CN103000074A - Conversion method and conversion system for electronic maps with height information - Google Patents
Conversion method and conversion system for electronic maps with height information Download PDFInfo
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- CN103000074A CN103000074A CN2011102786867A CN201110278686A CN103000074A CN 103000074 A CN103000074 A CN 103000074A CN 2011102786867 A CN2011102786867 A CN 2011102786867A CN 201110278686 A CN201110278686 A CN 201110278686A CN 103000074 A CN103000074 A CN 103000074A
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Abstract
The invention relates to a conversion method and a conversion system for electronic maps with height information. The conversion method includes firstly, converting information of a first electronic map into information of a second electronic map; secondly, determining a plurality of first geological positions, which are adjacent to each second geological position, in the first electronic map on the basis of coordinates of the second geological position and coordinates of various first geological positions; and thirdly, determining height information of each second geological position on the basis of determined respective height information of the corresponding first geological positions adjacent to the second geological position so as to form information of the second electronic map containing the height information. The various first geological positions of the first electronic map are represented by the coordinates of a first coordinate system, and the various second geological positions of the second electronic map are represented by the coordinates of a second coordinate system. The conversion method and the conversion system have the advantage that the electronic maps in different formats can be converted among one another so as to bring convenience for users.
Description
Technical field
The invention belongs to the conversion field of electronic chart, particularly a kind of conversion method and system with electronic chart of elevation information.
Background technology
Because loss can occur in electric wave after course is stopped by barrier, and can the loss of electric wave be estimated based on the elevation information of barrier, by obtaining more accurately Wave Propagation Prediction result to radio wave propagation loss correction, therefore, the electronic chart that has an elevation information is widely used in fields such as terrestrial transmission at remote sensing remote measurement, electric wave.Yet; because it is varied to have the form of the electronic chart with elevation information now; and the sole user usually comes development based on a kind of data message of electronic chart of set form; will cause thus its product of developing can't utilize the data message of the electronic chart of other form; therefore; in the urgent need to a kind of method that can carry out format conversion, use with convenient.
Summary of the invention
The object of the present invention is to provide a kind of conversion method and system with electronic chart of elevation information, changed in order to will have the electronic chart of elevation information.
Based on above-mentioned purpose, the method for the invention comprises step: the coordinate that 1) will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system; 2) based on the coordinate in each the second geographic position and the coordinate in each the first geographic position, in described the first electronic chart, determine a plurality of first geographic position adjacent with each second geographic position; 3) based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
Preferably, described step 3) also comprises step: based on determined first geographic position separately the elevation information adjacent with each second geographic position, adopt method of interpolation to determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
Preferably, described step 3) also comprises step: a) based on each the elevation information in the projected position information on the line in per two first geographic position in adjacent separately a plurality of the first geographic position, each second geographic position and this two the first geographic position, determine the elevation information of each projected position; B) determine the elevation information in corresponding the second geographic position of each projected position based on the elevation information of each projected position.
The present invention also provides a kind of converting system with electronic chart of elevation information, comprise: coordinate transferring, the coordinate that will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system; Determination module is put at the ortho position, is connected in described coordinate transferring, is used for determining a plurality of first geographic position adjacent with each second geographic position based on the coordinate in each the second geographic position and the coordinate in each the first geographic position in described the first electronic chart; The elevation information determination module, be connected in described ortho position and put determination module, be used for based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
Preferably, described elevation information determination module also comprises: interpolating module, be connected in described ortho position and put determination module, be used for based on determined first geographic position separately the elevation information adjacent with each second geographic position, adopt method of interpolation to determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
Preferably, described high computational module also comprises: projection module, be connected in described ortho position and put determination module, be used for determining the elevation information of each projected position based on the projected position information of each second geographic position on the line in adjacent separately per two the first geographic position, a plurality of the first geographic position and each the elevation information in this two the first geographic position; Sub-elevation information determination module is connected in described projection module, is used for determining based on the elevation information of each projected position the elevation information in corresponding the second geographic position of each projected position.
Beneficial effect of the present invention is: can will represent with the coordinate of the first coordinate system the first geographic position and the first electronic chart of comprising each first geographic position elevation information be converted to the second electronic chart that coordinate with the second coordinate system represents the second geographic position and comprises each second geographic position elevation information, use with convenient.
Description of drawings
Fig. 1 is the conversion method process flow diagram with electronic chart of elevation information of the present invention;
Fig. 2 is the projected position information synoptic diagram of the second geographic position on the line in per two the first geographic position in the first coordinate system;
Fig. 3 is the converting system structural representation with electronic chart of elevation information of the present invention.
Embodiment
Fig. 1 shows the conversion method process flow diagram with electronic chart of elevation information of the present invention.Wherein, conversion method of the present invention is mainly carried out by converting system, and described converting system is to be installed in application module in the computer equipment etc.This computer equipment is a kind ofly can carry out automatically, at high speed the modernized intelligent electronic device of massive values computation and various information processings according to the program of prior storage, and its hardware includes but not limited to microprocessor, FPGA, DSP, embedded device etc.
In step S1, the coordinate that described converting system will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system.Wherein, described the first coordinate system and described the second coordinate system are respectively two kinds of different coordinate systems, and preferably, described the first coordinate is the UTM coordinate system, and then described the second coordinate is the WGS84 coordinate system; Perhaps, described the first coordinate is the WGS84 coordinate system, and then described the second coordinate is UTM coordinate system etc.
Particularly, described converting system is converted to the first electronic chart the second electronic chart that comprises a plurality of the second geographic position based on dimension information and the boundary information of described the first electronic chart.
For example, described converting system first with the pixel of first row in described the first electronic chart separately the coordinate in corresponding the first geographic position and last row pixel separately the coordinate in corresponding the first geographic position be converted to respectively coordinate in the second coordinate system according to the first predetermined formula, with the pixel that obtains first row in the second electronic chart pixel of last row coordinate in corresponding the second geographic position separately in the coordinate in corresponding the second geographic position and the second electronic chart separately, subsequently again take the pixel of described first row separately the coordinate in corresponding the second geographic position as starting point, obtain secondary series with predetermined stepping, the 3rd row, .... N row pixel is the coordinate in corresponding the second geographic position separately, wherein, N row pixel separately the coordinate in corresponding the second geographic position less than the pixel of last row in described the second electronic chart coordinate in corresponding the second geographic position separately.Wherein, described the first predetermined formula is known to those skilled in the art knowing, so be not described in detail in this.
Need to prove, those skilled in the art should understand that, described abovely only just list, but not limitation of the present invention, in fact, any coordinate that will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the mode that represents second electronic map information in each second geographic position with the coordinate of the second coordinate system, all should be within the scope of the present invention.
In addition, also need to prove, those skilled in the art should understand that, adopt the electronic chart of UTM coordinate system, its minimum step is 20m, and the electronic chart of employing WGS84 coordinate system (namely longitude and latitude), its minimum step is 1 second, because the first electronic chart is different from the minimum step of the second electronic chart, so when described converting system was converted to the second electronic chart with the first electronic chart, the first geographic position that comprises in described the first electronic chart was not corresponding one by one with the second geographic position that described the second electronic chart comprises.For example, adopt the UTM coordinate system with the first electronic chart, it is example that the second electronic chart adopts the WGS84 coordinate, comprising origin coordinates among the first electronic chart L1 is (x1, y1) the first geographic position A1, coordinate is (x2, y2) the second geographic position A2, ... and the termination coordinate is (x3, y3) the first geographic position A3, wherein, the first geographic position A1 is adjacent with the second geographic position A2, so the distance between the first geographic position A1 and the second geographic position A2 is minimum step, be 20m, if described converting system is based on this first electronic chart L1 origin coordinates, stop coordinate and minimum step and be converted into that to comprise origin coordinates be (p1, q1) the second geographic position B1, coordinate is (p2, q2) the second geographic position B2, ... and the termination coordinate is (p3, q3) the second geographic position B3, wherein, the second geographic position B1 is adjacent with the second geographic position B2, so the distance between the second geographic position B1 and the second geographic position B2 is minimum step, namely 1 second, this shows, even the second geographic position B1 in the first geographic position A1 in the first electronic chart and the second electronic chart is same place, but because the first electronic chart is different from the second electronic chart minimum step separately, obviously, the first geographic position A2 and the second geographic position B2 in the second electronic chart in the first electronic chart also can not be same place, this shows that the first geographic position that comprises in described the first electronic chart is not corresponding one by one with the second geographic position that described the second electronic chart comprises.
Then, in step S2, described converting system is determined a plurality of first geographic position adjacent with each second geographic position based on the coordinate in each the second geographic position and the coordinate in each the first geographic position in described the first electronic chart.
Particularly, described converting system is converted to coordinate in the first coordinate system with the coordinate in each the second geographic position according to the second predetermined formula, and determines a plurality of the first geographic position that each second geographic position is adjacent based on each the second geographic position coordinate in the first coordinate system; Perhaps, described converting system is converted to coordinate in the second coordinate system with the coordinate in each the first geographic position according to the first predetermined formula, and determines a plurality of the first geographic position that each second geographic position is adjacent based on the coordinate in the second coordinate system in each the first geographic position.Wherein, described the second predetermined formula is known to those skilled in the art knowing, so be not described in detail in this.
Then, in step S3, described converting system is determined the elevation information in each the second geographic position based on determined a plurality of the first geographic position elevation information separately adjacent with each second geographic position, comprises the second electronic map information of elevation information with formation.Wherein, described converting system is based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise with formation elevation information the second electronic map information mode including but not limited to:
1) select one in a plurality of the first geographic position elevation information separately adjacent with the second geographic position as the elevation information in this second geographic position, wherein, the mode of selection includes but not limited to select at random, selects reckling, selects the maximum etc.; For example, described converting system determines that in step S2 first geographic position adjacent with the second geographic position B11 comprises: elevation information is that the first geographic position A11, the elevation information of m11 is the first geographic position A12 of m12, and then described converting system is based on selecting the maximum with the elevation information of elevation information m12 as the second geographic position B11.
2) adopt method of interpolation to determine the elevation information in the second geographic position; Wherein, described method of interpolation includes but not limited to: linear interpolation method, Lagrange's interpolation etc.
For example, described converting system determines that in step S2 first geographic position adjacent with the second geographic position B21 comprises: elevation information is that the first geographic position A21, the elevation information of m21 is the first geographic position A22 of m22, then to ask for elevation information based on linear interpolation method be that m21 and elevation information are the mean value of m22 to described converting system, and with the elevation information of this mean value as the second geographic position B21.
Preferably, described step S3 comprises step S31 (not giving diagram) and step S32 (not giving diagram).
In step S31, described converting system is determined the elevation information of each projected position based on each the elevation information in the projected position information on the line in per two first geographic position in adjacent separately a plurality of the first geographic position, each second geographic position and this two the first geographic position.
For example, described converting system determines that in step S2 first geographic position adjacent with the second geographic position B31 comprises: elevation information is that the first geographic position A31, the elevation information of m31 is that the first geographic position A32, the elevation information of m32 is that the first geographic position A33, the elevation information of m33 is the first geographic position A34 of m34, and then described converting system is converted to coordinate in the first coordinate system with the coordinate of described the second geographic position B31 according to the second predetermined formula first.Wherein, the first geographic position A31, the first geographic position A32, the first geographic position A33, the first geographic position A34, the position of the second geographic position B31 in the first coordinate system respectively as shown in Figure 2, then, described converting system again based on the distance of the subpoint a1 distance first geographic position A31 of the second geographic position B31 on the line of the first geographic position A31 and A32 and A32 than being 1: 1, the elevation information of determining subpoint a1 is the elevation information of elevation information+1/2* the first geographic position A32 of 1/2* the first geographic position A31, equally, described converting system is again based on the projected position information of the subpoint a2 of the second geographic position B31 on the line of the first geographic position A32 and A33, the projected position information of subpoint a3 on the line of the first geographic position A33 and A34, the projected position information of subpoint a4 on the line of the first geographic position A34 and A31 is determined respectively subpoint a2, a3, the elevation information of a4.
Need to prove, only just list shown in above-mentioned, but not limitation of the present invention, in fact, also can be the coordinate in the second coordinate system with the coordinate conversion in a plurality of the first geographic position adjacent with the second geographic position, in the second coordinate system, determine again the elevation information of the projected position of the second geographic position on per two the first geographic position lines.
Then, in step S32, described converting system is determined the elevation information in corresponding the second geographic position of each projected position based on the elevation information of each projected position.Wherein, described converting system determines that based on the elevation information of each projected position the mode of the elevation information in corresponding the second geographic position of each projected position includes but not limited to:
I) with the mean value of the elevation information of each projected position elevation information as corresponding the second geographic position of this projected position; For example, the elevation information of the projected position a1 that described converting system is determined in step S31 is that the elevation information of n1, projected position a2 is that the elevation information of n2, projected position a3 is that the elevation information of n3, projected position a4 is n4, and then described converting system is that the mean value (n1+n2+n3+n4)/4 of n1, n2, n3, n4 is as the elevation information of projected position a1, a2, corresponding the second geographic position B31 of a3, a4 with elevation information.
Ii) described converting system is again based on the projected position information of the second geographic position on the line of adjacent two projected positions, determine the elevation information of projected position again, determine this second geographic position based on the elevation information of described projected position again again.Still Figure 2 shows that example, for example, described converting system determines that in step S31 the elevation information of the projected position a1 of the second geographic position B31 is n1, the elevation information of projected position a2 is n2, the elevation information of projected position a3 is n3, the elevation information of projected position a4 is n4, then described converting system is determined the elevation information of the subpoint b1 (do not give diagram) of the second geographic position B31 on subpoint a1 and a4 line again according to the described mode of step S31, the elevation information of subpoint b2 on subpoint a2 and a3 line (not giving diagram) is again with the mean value of the elevation information of subpoint b1 and the b2 elevation information as described the second geographic position B31.
Need to prove, those skilled in the art should understand that, definite mode of the elevation information in above-mentioned the second geographic position only just lists, but not limitation of the present invention, in fact, any based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the mode of the elevation information in each the second geographic position, for example, adopt nonlinear interpolation, again for example, with the weighted mean value of the elevation information of subpoint as the elevation information in the second geographic position etc., all should be within the scope of the present invention.
Fig. 3 shows the structural representation of the converting system of the electronic chart with elevation information of the present invention.Wherein said converting system 1 comprises that coordinate transferring 10, ortho position put determination module 11, elevation information determination module 12.
The coordinate that described coordinate transferring 10 will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system.Wherein, described the first coordinate system and described the second coordinate system are respectively two kinds of different coordinate systems, and preferably, described the first coordinate is the UTM coordinate system, and then described the second coordinate is the WGS84 coordinate system; Perhaps, described the first coordinate is the WGS84 coordinate system, and then described the second coordinate is UTM coordinate system etc.
Particularly, described coordinate transferring 10 is converted to the first electronic chart the second electronic chart that comprises a plurality of the second geographic position based on dimension information and the boundary information of described the first electronic chart.
For example, described coordinate transferring 10 first with the pixel of first row in described the first electronic chart separately the coordinate in corresponding the first geographic position and last row pixel separately the coordinate in corresponding the first geographic position be converted to respectively coordinate in the second coordinate system according to the first predetermined formula, with the pixel that obtains first row in the second electronic chart pixel of last row coordinate in corresponding the second geographic position separately in the coordinate in corresponding the second geographic position and the second electronic chart separately, subsequently again take the pixel of described first row separately the coordinate in corresponding the second geographic position as starting point, obtain secondary series with predetermined stepping, the 3rd row, .... N row pixel is the coordinate in corresponding the second geographic position separately, wherein, N row pixel separately the coordinate in corresponding the second geographic position less than the pixel of last row in described the second electronic chart coordinate in corresponding the second geographic position separately.Wherein, described the first predetermined formula is known to those skilled in the art knowing, so be not described in detail in this.
Need to prove, those skilled in the art should understand that, described abovely only just list, but not limitation of the present invention, in fact, any coordinate that will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the mode that represents second electronic map information in each second geographic position with the coordinate of the second coordinate system, all should be within the scope of the present invention.
In addition, also need to prove, those skilled in the art should understand that, adopt the electronic chart of UTM coordinate system, its minimum step is 20m, and the electronic chart of employing WGS84 coordinate system (namely longitude and latitude), its minimum step is 1 second, because the first electronic chart is different from the minimum step of the second electronic chart, so when described coordinate transferring 10 was converted to the second electronic chart with the first electronic chart, the first geographic position that comprises in described the first electronic chart was not corresponding one by one with the second geographic position that described the second electronic chart comprises.For example, adopt the UTM coordinate system with the first electronic chart, it is example that the second electronic chart adopts the WGS84 coordinate, comprising origin coordinates among the first electronic chart L1 is (x1, y1) the first geographic position A1, coordinate is (x2, y2) the second geographic position A2, ... and the termination coordinate is (x3, y3) the first geographic position A3, wherein, the first geographic position A1 is adjacent with the second geographic position A2, so the distance between the first geographic position A1 and the second geographic position A2 is minimum step, be 20m, if described coordinate transferring 10 is based on this first electronic chart L1 origin coordinates, stop coordinate and minimum step and be converted into that to comprise origin coordinates be (p1, q1) the second geographic position B1, coordinate is (p2, q2) the second geographic position B2, ... and the termination coordinate is (p3, q3) the second geographic position B3, wherein, the second geographic position B1 is adjacent with the second geographic position B2, so the distance between the second geographic position B1 and the second geographic position B2 is the minimum step value, namely 1 second, this shows, even the second geographic position B1 in the first geographic position A1 in the first electronic chart and the second electronic chart is same place, but because the first electronic chart is different from the second electronic chart minimum step separately, obviously, the first geographic position A2 and the second geographic position B2 in the second electronic chart in the first electronic chart also can not be same place, this shows that the first geographic position that comprises in described the first electronic chart is not corresponding one by one with the second geographic position that described the second electronic chart comprises.
Then, determination module 11 is put based on coordinate definite a plurality of first geographic position adjacent with each second geographic position in described the first electronic chart in the coordinate in each the second geographic position and each the first geographic position in described ortho position.
Particularly, described ortho position is put determination module 11 coordinate in each the second geographic position is converted to coordinate in the first coordinate system according to the second predetermined formula, and determines a plurality of the first geographic position that each second geographic position is adjacent based on each the second geographic position coordinate in the first coordinate system; Perhaps, described converting system is converted to coordinate in the second coordinate system with the coordinate in each the first geographic position according to the first predetermined formula, and determines a plurality of the first geographic position that each second geographic position is adjacent based on each the first geographic position coordinate in the second coordinate system.
Then, described elevation information determination module 12 is based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.Wherein, described elevation information determination module 12 is based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise with formation elevation information the second electronic map information mode including but not limited to:
1) select one in a plurality of the first geographic position elevation information separately adjacent with the second geographic position as the elevation information in this second geographic position, wherein, the mode of selection includes but not limited to select at random, selects reckling, selects the maximum etc.; For example, described ortho position is put determination module 11 and determined that first geographic position adjacent with the second geographic position B11 comprises: elevation information is that the first geographic position A11, the elevation information of m11 is the first geographic position A12 of m12, and then described elevation information determination module 12 is based on selecting the maximum with the elevation information of elevation information m12 as the second geographic position B11.
2) adopt method of interpolation to determine the elevation information in the second geographic position; Wherein, described method of interpolation includes but not limited to: linear interpolation method, Lagrange's interpolation etc.
Preferably, described elevation information determination module 12 comprises interpolating module (not giving diagram).It is that m21 and elevation information are the mean value of m22 that described interpolating module is asked for elevation information based on linear interpolation method, and with the elevation information of this mean value as the second geographic position.
For example, described ortho position is put determination module 11 and determined that first geographic position adjacent with the second geographic position B21 comprises: elevation information is that the first geographic position A21, the elevation information of m21 is the first geographic position A22 of m22, then to ask for elevation information based on linear interpolation method be that m21 and elevation information are the mean value of m22 to described interpolating module, and with the elevation information of this mean value as the second geographic position B21.
Preferably, described elevation information determination module 12 comprises projection module (not giving diagram) and sub-elevation information determination module (not giving diagram).
Described projection module is determined the elevation information of each projected position based on each the elevation information in the projected position information on the line in per two first geographic position in adjacent separately a plurality of the first geographic position, each second geographic position and this two the first geographic position.
For example, described ortho position is put determination module 11 and determined that first geographic position adjacent with the second geographic position B31 comprises: elevation information is the first geographic position A31 of m31, elevation information is the first geographic position A32 of m32, elevation information is the first geographic position A33 of m33, elevation information is the first geographic position A34 of m34, then described projection module is converted to coordinate in the first coordinate system with the coordinate of described the second geographic position B31 according to the second predetermined formula first, wherein, the first geographic position A31, the first geographic position A32, the first geographic position A33, the first geographic position A34, the position of the second geographic position B31 in the first coordinate system respectively as shown in Figure 2, then, described projection module again based on the distance of the subpoint a1 distance first geographic position A31 of the second geographic position B31 on the line of the first geographic position A31 and A32 and A32 than being 1: 1, the elevation information of determining subpoint a1 is: the elevation information of elevation information+1/2* the first geographic position A32 of 1/2* the first geographic position A31, equally, described projection module is again based on the projected position information of the subpoint a2 of the second geographic position B31 on the line of the first geographic position A32 and A33, the projected position information of subpoint a3 on the line of the first geographic position A33 and A34, the projected position information of subpoint a4 on the line of the first geographic position A34 and A31 is determined respectively subpoint a2, a3, the elevation information of a4.
Need to prove, only just list shown in above-mentioned, but not limitation of the present invention, in fact, described projection module also can be the coordinate in the second coordinate system with the coordinate conversion in a plurality of the first geographic position adjacent with the second geographic position, determines the elevation information of the projected position of the second geographic position on per two the first geographic position lines in the second coordinate system again.
Then, described sub-elevation information determination module is determined the elevation information in corresponding the second geographic position of each projected position based on the elevation information of each projected position.Wherein, described sub-elevation information determination module determines that based on the elevation information of each projected position the mode of the elevation information in corresponding the second geographic position of each projected position includes but not limited to:
I) with the mean value of the elevation information of each projected position elevation information as corresponding the second geographic position of this projected position; For example, described projection module determines that the elevation information of projected position a1 is that the elevation information of n1, projected position a2 is that the elevation information of n2, projected position a3 is that the elevation information of n3, projected position a4 is n4, and then described sub-elevation information determination module is that the mean value (n1+n2+n3+n4)/4 of n1, n2, n3, n4 is as the elevation information of projected position a1, a2, corresponding the second geographic position B31 of a3, a4 with elevation information.
Ii) described sub-elevation information determination module is again based on the projected position information of the second geographic position on the line of adjacent two projected positions, determine the elevation information of projected position again, determine this second geographic position based on the elevation information of described projected position again again.Still Figure 2 shows that example, for example, described projection module determines that the elevation information of the projected position a1 of the second geographic position B31 is n1, the elevation information of projected position a2 is n2, the elevation information of projected position a3 is n3, the elevation information of projected position a4 is n4, then described sub-elevation information determination module is determined the elevation information of the subpoint b1 (do not give diagram) of the second geographic position B31 on subpoint a1 and a4 line again according to the processing mode of described projection module, the elevation information of subpoint b2 on subpoint a2 and a3 line (not giving diagram) is again with the mean value of the elevation information of subpoint b1 and the b2 elevation information as described the second geographic position B31.
Need to prove, those skilled in the art should understand that, definite mode of the elevation information in above-mentioned the second geographic position only just lists, but not limitation of the present invention, in fact, any based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the mode of the elevation information in each the second geographic position, for example, adopt nonlinear interpolation, again for example, with the weighted mean value of the elevation information of subpoint as the elevation information in the second geographic position etc., all should be within the scope of the present invention.
In sum, beneficial effect of the present invention is: can will represent with the coordinate in the first coordinate system the first geographic position and the first electronic chart of comprising each first geographic position elevation information be converted to the coordinate in the second coordinate system and represent the second geographic position and comprise second electronic chart of each second geographic position elevation information, use with convenient.
Above-described embodiment just lists expressivity principle of the present invention and effect is described, but not is used for restriction the present invention.Any personnel that are familiar with technique all can without departing from the spirit and scope of the present invention, make amendment to above-described embodiment.Therefore, the scope of the present invention should be listed such as claims.
Claims (8)
1. the conversion method with electronic chart of elevation information is characterized in that, comprises step:
The coordinate that 1) will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system;
2) based on the coordinate in each the second geographic position and the coordinate in each the first geographic position, in described the first electronic chart, determine a plurality of first geographic position adjacent with each second geographic position;
3) based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
2. the conversion method with electronic chart of elevation information according to claim 1 is characterized in that, described step 3) also comprise step:
-based on determined first geographic position separately the elevation information adjacent with each second geographic position, adopt method of interpolation to determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
3. the conversion method with electronic chart of elevation information according to claim 1 and 2 is characterized in that, described step 3) also comprise step:
-based on each the elevation information in the projected position information on the line in per two first geographic position in adjacent separately a plurality of the first geographic position, each second geographic position and this two the first geographic position, determine the elevation information of each projected position;
-determine the elevation information in corresponding the second geographic position of each projected position based on the elevation information of each projected position.
4. the conversion method with electronic chart of elevation information according to claim 1 and 2 is characterized in that, the one in described the first coordinate system and the second coordinate system is the UTM coordinate system, and another one is the WGS84 coordinate system.
5. the converting system with electronic chart of elevation information is characterized in that, comprising:
Coordinate transferring, the coordinate that will comprise with the first coordinate system represents that first electronic map information in each first geographic position is converted to the second electronic map information that represents each second geographic position with the coordinate of the second coordinate system;
Determination module is put at the ortho position, is connected in described coordinate transferring, is used for determining a plurality of first geographic position adjacent with each second geographic position based on the coordinate in each the second geographic position and the various places coordinate in geographic position in described the first electronic chart;
The elevation information determination module, be connected in described ortho position and put determination module, be used for based on determined a plurality of first geographic position separately the elevation information adjacent with each second geographic position, determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
6. the converting system with electronic chart of elevation information according to claim 5 is characterized in that, described elevation information determination module also comprises:
Interpolating module, be connected in described ortho position and put determination module, be used for based on determined first geographic position separately the elevation information adjacent with each second geographic position, adopt method of interpolation to determine the elevation information in each the second geographic position, comprise the second electronic map information of elevation information with formation.
7. according to claim 5 or 6 described converting systems with electronic chart of elevation information, it is characterized in that described elevation information determination module also comprises:
Projection module, be connected in described ortho position and put determination module, be used for determining the elevation information of each projected position based on the projected position information of each second geographic position on the line in adjacent separately per two the first geographic position, a plurality of the first geographic position and each the elevation information in this two the first geographic position;
Sub-elevation information determination module is connected in described projection module, is used for determining based on the elevation information of each projected position the elevation information in corresponding the second geographic position of each projected position.
8. according to claim 5 or 6 described converting systems with electronic chart of elevation information, it is characterized in that the one in described the first coordinate system and the second coordinate system is the UTM coordinate system, another one is the WGS84 coordinate system.
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