CN105021181B - A kind of drawing electronic map area determination method, device and navigation equipment - Google Patents

A kind of drawing electronic map area determination method, device and navigation equipment Download PDF

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Publication number
CN105021181B
CN105021181B CN201410175338.0A CN201410175338A CN105021181B CN 105021181 B CN105021181 B CN 105021181B CN 201410175338 A CN201410175338 A CN 201410175338A CN 105021181 B CN105021181 B CN 105021181B
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electronic map
screen display
actual
picture element
per inch
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CN105021181A (en
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范联升
吴朝良
陈其义
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Autonavi Information Technology Co Ltd
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Autonavi Information Technology Co Ltd
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Priority to CN201410175338.0A priority Critical patent/CN105021181B/en
Priority to PCT/CN2014/092347 priority patent/WO2015165258A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
    • G01C21/3863—Structures of map data
    • G01C21/387—Organisation of map data, e.g. version management or database structures

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Databases & Information Systems (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Navigation (AREA)

Abstract

The invention discloses a kind of drawing electronic map area determination method, device and navigation equipment, to show regional extent that rational electronic map includes in different sizes, the navigation equipment of different resolution.Drawing electronic map area determination method, including：When drawing electronic map, the actual screen display parameters of navigation equipment are obtained；According to the actual screen display parameters and preset standard screen display parameters, determine that scale parameter is drawn in electronic map region；Scale parameter is drawn according to the electronic map region determined and determines drawing electronic map region.

Description

A kind of drawing electronic map area determination method, device and navigation equipment
Technical field
The present invention relates to electronic map processing technology field, more particularly to a kind of drawing electronic map area determination method, Device and navigation equipment.
Background technology
At present, show that the size in electronic map region and the resolution ratio of navigation equipment have in the display interface of navigation equipment Close, for size identical navigation equipment, when showing same electronic map, the navigation apparatus displays of high resolution The region that electronic map includes is wider, and the region that the electronic map of the low navigation apparatus displays of resolution ratio includes is narrower, such as Fig. 1 Shown, middle dash area is the viewing area of electronic map.
If the area size that the electronic map that user needs adjustment display interface to show includes is, it is necessary to manually adjust parameter Control currently shows the regional extent that the electronic map of interface display is included.
Because the size and resolution ratio of different hardware equipment are inconsistent, on the one hand, for the navigation equipment of high resolution, The regional extent that the electronic map that display interface is shown includes is relatively wide, it is necessary to the map datum amount of loading is relatively more, so, wash with watercolours The map datum amount that dye engine needs load is very big, have impact on the speed rendered；On the other hand, for the low navigation of resolution ratio Equipment, the regional extent that the electronic map that display interface is shown includes is narrower, although rendering engine needs the map datum loaded Measure less, but the regional extent shown possibly can not meet that user's checks demand.
Thus, it could be seen that how in different sizes, the navigation equipment of different resolution to show that rational electronic map includes Regional extent turn into urgent problem to be solved in the prior art.
The content of the invention
The embodiment of the present invention provides a kind of drawing electronic map area determination method, device and navigation equipment, to not The regional extent that rational electronic map includes is shown in same size, the navigation equipment of different resolution.
The embodiment of the present invention provides a kind of drawing electronic map area determination method, including：
When drawing electronic map, the actual screen display parameters of navigation equipment are obtained；
According to the actual screen display parameters and preset standard screen display parameters, determine that electronic map region is drawn Scale parameter；
Scale parameter is drawn according to the electronic map region determined and determines drawing electronic map region.
The embodiment of the present invention provides a kind of drawing electronic map area determining device, including：
Acquiring unit, for when drawing electronic map, obtaining the actual screen display parameters of navigation equipment；
Determining unit, for according to the actual screen display parameters and preset standard screen display parameters, it is determined that electric Sub- map area draws scale parameter；
Drawing electronic map unit, electronic map is determined for drawing scale parameter according to the electronic map region determined Drawing area.
The embodiment of the present invention provides a kind of navigation equipment, including above-mentioned drawing electronic map area determining device.
Drawing electronic map area determination method, device and navigation equipment provided in an embodiment of the present invention, drawing electronics During map, the actual screen display parameters of navigation equipment are obtained first, are shown and joined according to acquisition, navigation equipment actual screen Number and preset standard screen display parameters, determine that scale parameter is drawn in electronic map region, and according to determining electronically Graph region draws scale parameter and determines drawing electronic map region, in said process, it is determined that ratio is drawn in electronic map region During parameter, the actual screen display parameters of navigation equipment are with reference to so that the electronics determined according to drawing electronic map parameter Mapping more conforms to navigation equipment screen display, so as to show rational electronic map bag on navigation equipment screen The regional extent contained.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the contrast schematic diagram that same electronic map is shown in the navigation equipment of different resolution in the prior art；
Fig. 2 is the implementation process diagram of drawing electronic map area determination method in the embodiment of the present invention；
Fig. 3 is the structural representation of drawing electronic map area determining device in the embodiment of the present invention.
Embodiment
In order to realize the purpose that rational electronic map regional extent is shown on navigation equipment screen, the embodiment of the present invention Provide a kind of drawing electronic map area determination method, device and navigation equipment.
The preferred embodiments of the present invention are illustrated below in conjunction with Figure of description, it will be appreciated that described herein Preferred embodiment is merely to illustrate and explain the present invention, and is not intended to limit the present invention, and in the case where not conflicting, this hair The feature in embodiment and embodiment in bright can be mutually combined.
As shown in Fig. 2 illustrate for the implementing procedure of drawing electronic map area determination method provided in an embodiment of the present invention Figure, may comprise steps of：
S21, when drawing electronic map, obtain the actual screen display parameters of navigation equipment；
In the embodiment of the present invention, electronic map engine can provide UI (user interface) layer upstream device parameter information Interface：The screen display such as MEK_GRA_SetBaseMapRate, size, screen display resolution for receiving navigation equipment is joined Number information.So, when needing to draw electronic map, the actual screen display parameters of navigation equipment can be obtained by the interface Information.
S22, the actual screen display parameters according to acquisition and preset standard screen display parameters, determine electronic map area Draw scale parameter in domain；
When it is implemented, needing to pre-set standard screen display parameters, can be, but not limited to, which includes standard screen, shows Resolution ratio and standard screen size.Assuming that preset standard screen resolution ratio (PPI) is Ps1*Ps2, standard screen size is cun to be Cs。
Based on standard screen size and standard screen display resolution, it may be determined that go out standard screen per inch picture element density (DPI) below with DsRepresent standard screen per inch picture element density.Preferably, in the embodiment of the present invention, can be according to following public affairs Formula determines standard screen per inch picture element density：Using standard screen display resolution as 800*480, mark Exemplified by quasi- screen size is 13 cun, corresponding standard screen per inch picture element density (Ds) it is then 72.
Accordingly, in the embodiment of the present invention, actual screen size and actual screen display resolution based on navigation equipment, Actual screen per inch picture element density (D can be determinedt).Preferably, in the embodiment of the present invention, can be true according to below equation Determine actual screen per inch picture element density：
So, in step S22, based on the actual screen per inch picture element density and standard screen per inch pixel determined Density and actual screen size and standard screen size, it can determine that ratio ginseng is drawn in electronic map region according to equation below Number：Wherein：F represents that scale parameter is drawn in electronic map region；DtRepresent that actual screen per inch pixel is close Degree；DsRepresent standard screen per inch picture element density；CtRepresent actual screen size；CsRepresent standard screen size.
Draw scale parameter and determine drawing electronic map region in the electronic map region that S23, basis are determined.
Preferably, in step S23, drawing electronic map region can be determined according to below equation：F=f*l, wherein：F tables Show actual drawing area, l represents preset standard area.
For example, be that 1 pixel draws 100 meters of region, exemplified by f=2 by preset standard area, in the embodiment of the present invention, It is determined that, it is necessary to draw 100 meters of region with 2 pixels during drawing electronic map region, i.e., in the embodiment of the present invention, use 2 Individual pixel draws the region that 1 pixel of standard device represents.
After drawing electronic map region is defined, electronic map engine can be with according to the drawing area determined Draw electronic map.
In order to be better understood from the present invention, the embodiment of the present invention is illustrated by taking two navigation equipments as an example below, needed It is noted that navigation equipment of the present invention can be special navigator or the terminal for being provided with electronic map Equipment etc., the present invention are not limited this.For the ease of description, 800*480, standard screen are arranged to standard screen resolution ratio It is sized to exemplified by 13 cun, so as to be capable of determining that standard screen per inch pixel is close according to the formula provided in step S22 Spend for 72, and preset standard draws distance and draws 100 meters for 1 pixel, then 800 pixels can draw 800*100=80KM Region.
Assuming that the actual screen resolution ratio of first navigation equipment is 960*640, actual screen size is 3.5 cun, then may be used To determine actual screen per inch picture element density as 330；Assuming that the actual screen resolution ratio of second navigation equipment is 1136* 640, actual screen size is 4 cun, then it is 326 that can determine actual screen per inch picture element density.
It can determine that the electronic map region of first navigation equipment draws scale parameter and is according to step S22；Draw scale parameter in the electronic map region of second navigation equipment。
Then according to step 23 it was determined that the drawing electronic map region of first navigation equipment is：；The drawing electronic map region of second navigation equipment is：, with standard The region that equipment can draw 80KM is also basically identical.That is, in the embodiment of the present invention, different screen size and screen show Show that the scope that the electronic map shown in the navigation equipment of resolution ratio is included is basically identical.
As can be seen here, the drawing electronic map area determination method provided according to embodiments of the present invention is determined electronically Figure drawing area is essentially identical, in different screen size and the navigation equipment of screen display resolution can viewing area it is basic Identical electronic map.
In the embodiment of the present invention, due to reference to the actual screen display parameters of navigation equipment so that according to electronic map The drawing electronic map that rendering parameter is determined more conforms to navigation equipment screen display, so as on navigation equipment screen Show the regional extent that rational electronic map includes.Meanwhile rendering parameter is manually adjusted without user, electronic map engine can Drawing electronic map region is determined with the screen size and screen display resolution of the navigation equipment according to acquisition, so as to improve The drafting efficiency of electronic map.
Based on same inventive concept, additionally provided in the embodiment of the present invention a kind of drawing electronic map area determining device and Navigation equipment, because the principle of said apparatus and equipment solution problem is similar to drawing electronic map area determination method, therefore The implementation of said apparatus and equipment may refer to the implementation of method, repeats part and repeats no more.
As shown in figure 3, for the structural representation of drawing electronic map area determining device provided in an embodiment of the present invention, can With including：
Acquiring unit 31, for when drawing electronic map, obtaining the actual screen display parameters of navigation equipment；
Determining unit 32, actual screen display parameters and preset standard screen for being obtained according to acquiring unit 31 show Show parameter, determine that scale parameter is drawn in electronic map region；
Scale parameter is drawn in drawing area determining unit 33, the electronic map region for being determined according to determining unit 32 Determine drawing electronic map region.
Preferably, when it is implemented, screen display parameters can include screen size and screen display resolution, then Determining unit 32, it can include：
First determination subelement, it can be used for, according to standard screen size and standard screen display resolution, determining standard Screen per inch picture element density；And according to actual screen size and actual screen display resolution, determine actual screen per English Very little picture element density；
Second determination subelement, it can be used for determining that scale parameter is drawn in the electronic map region according to equation below：Wherein：F represents that scale parameter is drawn in electronic map region；DtRepresent actual screen per inch picture element density；Ds Represent standard screen per inch picture element density；CtRepresent actual screen size；CsRepresent standard screen size.
When it is implemented, standard screen display resolution can be expressed as Ps1*Ps2, actual screen display resolution can be with It is expressed as Pt1*Pt2；First determination subelement, specifically for determining standard screen per inch picture element density according to equation below：And determine actual screen per inch picture element density according to equation below：
Preferably, when it is implemented, drawing area determining unit 33, can be used for determining actual draw according to equation below Region：Wherein：F represents actual drawing area, and l represents preset standard area distance.
Preferably, acquiring unit 31, can be used for obtaining by user interface UI layer upstream device parameter informations interface and leads The actual screen display parameters for equipment of navigating.
For convenience of description, above each several part is divided by function describes respectively for each module (or unit).Certainly, exist The function of each module (or unit) can be realized in same or multiple softwares or hardware when implementing of the invention.
When it is implemented, above-mentioned drawing electronic map area determining device can be arranged in navigation equipment.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (11)

  1. A kind of 1. drawing electronic map area determination method, it is characterised in that including：
    When drawing electronic map, the actual screen display parameters of navigation equipment are obtained；
    According to the actual screen display parameters and preset standard screen display parameters, determine that ratio is drawn in electronic map region Parameter；
    Scale parameter is drawn according to the electronic map region determined and determines drawing electronic map region.
  2. 2. the method as described in claim 1, it is characterised in that the screen display parameters include screen size and screen display Resolution ratio；And
    According to the actual screen display parameters and preset standard screen display parameters, determine that ratio is drawn in electronic map region Parameter, specifically include：
    According to standard screen size and standard screen display resolution, standard screen per inch picture element density is determined；
    According to actual screen size and actual screen display resolution, actual screen per inch picture element density is determined；And
    Determine that scale parameter is drawn in the electronic map region according to equation below：Wherein：
    F represents that scale parameter is drawn in electronic map region；
    DtRepresent actual screen per inch picture element density；
    DsRepresent standard screen per inch picture element density；
    CtRepresent actual screen size；
    CsRepresent standard screen size.
  3. 3. method as claimed in claim 2, it is characterised in that standard screen display resolution is Ps1*Ps2, actual screen shows Resolution ratio is Pt1*Pt2；And
    According to standard screen size and standard screen display resolution, standard screen per inch picture element density is determined, is specifically included：
    Standard screen per inch picture element density is determined according to equation below：
    According to actual screen size and actual screen display resolution, actual screen per inch picture element density is determined, is specifically included：
    Actual screen per inch picture element density is determined according to equation below：
  4. 4. method as claimed in claim 3, it is characterised in that it is true that scale parameter is drawn according to the electronic map region determined Determine drawing electronic map region, specifically include：
    Actual drawing area is determined according to equation below：Wherein：F represents actual drawing area, and l represents preset Standard area distance.
  5. 5. the method as described in claim 1, it is characterised in that obtain the actual screen display parameters of navigation equipment, specific bag Include：
    The actual screen display parameters of navigation equipment are obtained by user interface UI layer upstream device parameter informations interface.
  6. A kind of 6. drawing electronic map area determining device, it is characterised in that including：
    Acquiring unit, for when drawing electronic map, obtaining the actual screen display parameters of navigation equipment；
    Determining unit, for according to the actual screen display parameters and preset standard screen display parameters, it is determined that electronically Graph region draws scale parameter；
    Drawing area determining unit, drawing electronic map is determined for drawing scale parameter according to the electronic map region determined Region.
  7. 7. device as claimed in claim 6, it is characterised in that the screen display parameters include screen size and screen display Resolution ratio；And
    The determining unit, including：
    First determination subelement, for according to standard screen size and standard screen display resolution, determining standard screen per English Very little picture element density；And according to actual screen size and actual screen display resolution, determine that actual screen per inch pixel is close Degree；
    Second determination subelement, for determining that scale parameter is drawn in the electronic map region according to equation below：Wherein：F represents that scale parameter is drawn in electronic map region；DtRepresent actual screen per inch picture element density；Ds Represent standard screen per inch picture element density；CtRepresent actual screen size；CsRepresent standard screen size.
  8. 8. device as claimed in claim 7, it is characterised in that standard screen display resolution is Ps1*Ps2, actual screen shows Resolution ratio is Pt1*Pt2；And
    First determination subelement, specifically for determining standard screen per inch picture element density according to equation below：And determine actual screen per inch picture element density according to equation below：
    <mrow> <msub> <mi>D</mi> <mi>t</mi> </msub> <mo>=</mo> <mfrac> <msqrt> <msup> <msub> <mi>P</mi> <mrow> <mi>t</mi> <mn>1</mn> </mrow> </msub> <mn>2</mn> </msup> <mo>+</mo> <msup> <msub> <mi>P</mi> <mrow> <mi>t</mi> <mn>2</mn> </mrow> </msub> <mn>2</mn> </msup> </msqrt> <msub> <mi>C</mi> <mi>t</mi> </msub> </mfrac> <mo>.</mo> </mrow>
  9. 9. device as claimed in claim 8, it is characterised in that
    The drawing area determining unit, specifically for determining actual drawing area according to equation below：Wherein：F Actual drawing area is represented, l represents preset standard area distance.
  10. 10. device as claimed in claim 6, it is characterised in that
    The acquiring unit, the reality specifically for obtaining navigation equipment by user interface UI layer upstream device parameter informations interface Border screen display parameters.
  11. 11. a kind of navigation equipment, it is characterised in that including the device described in claim 6~10 any claim.
CN201410175338.0A 2014-04-28 2014-04-28 A kind of drawing electronic map area determination method, device and navigation equipment Active CN105021181B (en)

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CN201410175338.0A CN105021181B (en) 2014-04-28 2014-04-28 A kind of drawing electronic map area determination method, device and navigation equipment
PCT/CN2014/092347 WO2015165258A1 (en) 2014-04-28 2014-11-27 Method and apparatus for determining electronic map drawing area, and navigation device

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CN110618799B (en) * 2019-09-11 2023-03-28 Oppo广东移动通信有限公司 Display method and device based on folding screen
CN111915699A (en) * 2020-06-16 2020-11-10 中铁第四勘察设计院集团有限公司 Method for generating and publishing tile map based on CAD data
CN111883066B (en) * 2020-07-09 2022-02-22 深圳市华星光电半导体显示技术有限公司 Gate electrode drive design method and device and electronic equipment
CN114166230A (en) * 2021-11-30 2022-03-11 北京新兴华安智慧科技有限公司 Data access method and device, electronic equipment and storage medium

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