CN104699709A - Method and system for combined hierarchical display of multiple positioning points - Google Patents
Method and system for combined hierarchical display of multiple positioning points Download PDFInfo
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Abstract
The invention discloses a method and a system for combined hierarchical display of multiple positioning points, and relates to the technical field of computer geological information systems. The method comprises the following steps: firstly, triggering map zooming according to demands, and acquiring a present display area range of the zoomed map; checking a geological coordinate of target positioning points within the present display area range, and converting the geological coordinate into a pixel coordinate on the map; finally confirming the pixel filtering radius on the map, filtering the pixel coordinate of the target positioning points within the present display area range according to the pixel filtering radius, converting the filtered pixel coordinate of the target positioning points into the geological coordinate, and calibrating and displaying the geological coordinate on the map. According to the method and the system disclosed by the invention, based on the zooming operation of a user to the map, the target positioning points within the present display range of the map can be combined and displayed hierarchically, the display mode of the target positioning points relatively well meets the practical display demands, the efficiency in displaying the target positioning points is also improved, and an effective solving scheme is provided for improving the user experience.
Description
Technical field
The present invention relates to geographic information computer system technical field, be specifically related to the method and system that a kind of multiple anchor point merges classification display.
Background technology
In geographic information computer system, often need the problem facing the anchor point displaying solving big data quantity.Currently represent at process big data quantity anchor point, common practice takes coordinate filtering technology, when map is amplified to certain specific map rank, just shown by real anchor point.Can also take in addition with " distributed points " signal.
The advantage of existing anchor point exhibition method in enormous quantities is: obviously alleviate map and be initialised to the displaying pressure between specific rank, shortcoming is after specific rank, the anchor point of target all displays, if it is large still to there is anchor point gather density under this rank, then exist and be difficult to the situation distinguishing objectives, as shown in fig. 1, the triangle symbols in figure is the anchor point needing to show on map, because a site quantity is comparatively large, intensive place cannot distinguish certain anchor point concrete.In a word, on anchor point is shown, lack stereovision in existing anchor point exhibition method in enormous quantities, anchor point is obscured easily to cause user to identify.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of multiple anchor point to merge the method and system of classification display, the method can carry out the merging classification display of target localization point according to the level of zoom of actual map.
For achieving the above object, the technical solution used in the present invention is: a kind of multiple anchor point merges the method for classification display, comprises the following steps:
(1) start map application, trigger map convergent-divergent as required, and the current display area scope of map after obtaining convergent-divergent;
(2) inquire about the geographic coordinate of current display area scope internal object anchor point, and geographic coordinate is converted into the pixel coordinate on map;
(3) determine that the pixel on map filters radius, and filter according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtain the pixel coordinate of the target localization point after filtering;
(4) pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.
Further, a kind of multiple anchor point as above merges the method for classification display, in step (1), also comprises the current zoom rank obtaining map after convergent-divergent, in step (3), filter radius according to the pixel on the current zoom rank determination map of map after convergent-divergent.
Further, a kind of multiple anchor point as above merges the method for classification display, in step (2), when geographic coordinate being converted into the pixel coordinate on map, record the coordinate ID of geographic coordinate corresponding to each pixel coordinate, in step (4), when pixel coordinate is converted to geographic coordinate, the coordinate ID corresponding according to pixel coordinate obtains the geographic coordinate of its correspondence.
Further, a kind of multiple anchor point as above merges the method for classification display, and in step (3), the concrete mode of filtering the pixel coordinate of radius filtration current display area scope internal object anchor point according to pixel comprises:
Determine the filter center's point within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds square, if target localization point drops within described square, then vanishing target anchor point, then retains target localization point if not.
Further, a kind of multiple anchor point as above merges the method for classification display, and in step (3), the concrete mode of filtering the pixel coordinate of radius filtration current display area scope internal object anchor point according to pixel comprises:
Determine the filter center's point within the scope of current display area, calculate the distance of target localization point and filter center's point;
Check whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retain target localization point if not.
Further, a kind of multiple anchor point as above merges the method for classification display, in step (4), the pixel coordinate of the target localization point after filtering is converted into geographic coordinate and the concrete mode of demarcating display on map is:
The target localization point kept after filtration is shown in the mode of coordinate single-point, all target localization points hidden after filtration are shown in the mode of coordinate point group.
Further again, a kind of multiple anchor point as above merges the method for classification display, and during mode display-object anchor point with coordinate point group, the geographic coordinate of the coordinate point group of display is the geographic coordinate of filter center's point.
Further, a kind of multiple anchor point as above merges the method for classification display, and described filter center's point is any point within the scope of current display area or is a target localization point within the scope of current display area.
Multiple anchor point merges a system for classification display, comprising:
Engine map module, for starting map application, triggers map convergent-divergent as required, and the current display area scope of map after obtaining convergent-divergent;
Coordinate enquiry module, for inquiring about the geographic coordinate of current display area scope internal object anchor point, and is converted into the pixel coordinate on map by geographic coordinate;
Coordinate filtering module, for determining that the pixel on map filters radius, and filtering according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtaining the pixel coordinate of the target localization point after filtering;
Coordinate display module, for the pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.
Further, a kind of multiple anchor point as above merges the system of classification display, and described coordinate filtering module comprises:
Metrics calculation unit, for determining the filter center's point within the scope of current display area, calculates the distance of target localization point and filter center's point;
Filter element, for checking whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retains target localization point if not.
Further, a kind of multiple anchor point as above merges the system of classification display, and described coordinate filtering module comprises:
Filter square construction unit, for determining the filter center's point within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds square.
Filter element, for checking whether target localization point drops within described square, if then vanishing target anchor point, then retains target localization point if not.
Further again, a kind of multiple anchor point as above merges the system of classification display, and described coordinate display module comprises:
Single-point display unit, for showing the target localization point kept after filtration in the mode of coordinate single-point;
Point group display unit, shows in the mode of coordinate point group for just filtering rear hiding all target localization points.
Beneficial effect of the present invention is: method and system of the present invention, according to the zoom operations of user to map, the target localization point multiple spot in the current indication range of map is enable to merge classification display, make the display mode more realistic display needs of target localization point, also improving the efficiency of target localization point display, providing effective solution for promoting Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing anchor point display in enormous quantities;
Fig. 2 is the structured flowchart that in embodiment, a kind of multiple anchor point merges the system of classification display;
Fig. 3 is the workflow schematic diagram that in embodiment, a kind of multiple anchor point merges each module of the system of classification display;
Fig. 4 is the process flow diagram that in embodiment, a kind of multiple anchor point merges the method for classification display;
Fig. 5 adopts method of the present invention to carry out the result schematic diagram shown in embodiment;
Fig. 6 is the personal settings display schematic diagram of coordinate point group in embodiment.
Embodiment
Below in conjunction with Figure of description and embodiment, the present invention is described in further detail.
Fig. 2 and Fig. 3 respectively illustrates a kind of multiple anchor point in the specific embodiment of the invention and merges the workflow diagram between the structured flowchart of the system of classification display and each module, this system mainly includes engine map module 11, coordinate enquiry module 12, coordinate filtering module 13 and coordinate display module 14, wherein:
Engine map module 11, for starting map application, triggers map convergent-divergent as required, and the current display area scope of map after obtaining convergent-divergent.
Geographic coordinate for inquiring about the geographic coordinate of current display area scope internal object anchor point, and is converted into the pixel coordinate on map by coordinate enquiry module 12.
Coordinate filtering module 13 for determining that the pixel on map filters radius, and filters according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtains the pixel coordinate of the target localization point after filtering;
Coordinate display module 14 for the pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.
Coordinate filtering module 13 in present embodiment can adopt the pixel coordinate of Filtration Goal anchor point in two ways, under a kind of mode, this module includes the filter center's point for determining within the scope of current display area, calculate the metrics calculation unit of the distance of target localization point and filter center's point, and for checking whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retain the filter element of target localization point if not; Under another kind of mode, this module comprises the filter center's point for determining within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds the square construction unit of foursquare filtration, and for checking whether target localization point drops within described square, if then vanishing target anchor point, then retain the filter element of target localization point if not.Wherein, filter center's point can be determined as required by user, can be any point within the scope of current display area, also can be a target localization point within the scope of current display area.
When coordinate display module 14 demarcates display-object pixel on map, include the single-point display unit for being shown in the mode of coordinate single-point by the target localization point kept after filtration, and for just filtering the point group display unit that rear hiding all target localization points show in the mode of coordinate point group.
In the operation of reality, this system also should comprise coordinate memory module 15(and be equivalent to database), this module is for storing the locator data of target localization point, and coordinate enquiry module 12 obtains the geographic coordinate of target localization point by the locator data obtained in coordinate memory module 15.
After the pixel coordinate being obtained the target localization point after filtering by coordinate filtering module 13, if the display result after having crossed also does not meet the display demand of user, user can carry out map convergent-divergent by engine map module 11 again, again carries out adjustment display by above-mentioned each module.
Fig. 4 shows the process flow diagram merging the method for classification display in this embodiment based on a kind of multiple anchor points of system shown in Fig. 2 and Fig. 3, and the method mainly comprises the following steps:
Step S21: trigger map convergent-divergent, and the current display area scope of map after obtaining convergent-divergent;
Step S22: the pixel coordinate obtaining current display area scope internal object anchor point;
Start the map application on terminal device, trigger map convergent-divergent as required, and the current display area scope of map and the level of zoom of current map after obtaining convergent-divergent, locator data afterwards in Query Database, obtain the geographic coordinate of current display area scope internal object anchor point, and geographic coordinate is converted into the pixel coordinate on map.Wherein, described geographic coordinate is the actual coordinate of target localization point, and pixel coordinate is the displaing coordinate of target localization point on map.Wherein, when the geographic coordinate of target localization point is converted into the pixel coordinate on map, record the coordinate ID of geographic coordinate corresponding to each pixel coordinate.
Target localization point in this embodiment is the point that user needs to inquire about the class object correspondence on map obtained, such as, user needs the display of positional information on map obtaining a series of vehicle, so, the point that the positional information of a series of vehicle is corresponding on map is target localization point.
Step S23: filter the pixel coordinate that radius filters current display area scope internal object anchor point according to pixel;
Step S24: the target localization point after filtering is demarcated display on map.
Determine that the pixel on map filters radius, and filter according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtain the pixel coordinate of the target localization point after filtering, the pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.Due in step 22, when the geographic coordinate of each target localization point is converted into pixel coordinate, have recorded the coordinate ID of geographic coordinate corresponding to each pixel coordinate, therefore, when the pixel coordinate of target localization point after filtering is converted to geographic coordinate, coordinate ID that can be directly corresponding according to pixel coordinate obtains the geographic coordinate of its correspondence.In actual applications, a large amount of reversals can be saved in this way and calculate, and effective guarantee coordinate data is undistorted.
In this embodiment, radius is filtered according to the pixel on the current zoom rank determination map of map after convergent-divergent, like this along with the change of map zoom levels, automatically can adjust pixel and filter radius, the map denotation scope after making the display mode of target localization point and display effect more meet convergent-divergent.
Provide two kinds in this embodiment and filter according to pixel the mode that radius filters the pixel coordinate of current display area scope internal object anchor point, a kind of concrete mode is as follows:
First, determine the filter center's point within the scope of current display area, calculate the distance of target localization point and filter center's point; Wherein, filter center's point is any point within the scope of current display area or is a target localization point within the scope of current display area;
Then, check whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retain target localization point if not.
Another kind of mode is: determine the filter center's point within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds square, if target localization point drops within described square, then vanishing target anchor point, then retains target localization point if not.Namely filter radius based on pixel to build " pixel filters square ", the point dropped in square is hidden.
The pixel coordinate of target localization point after filtering is converted into geographic coordinate and the concrete mode of demarcating display on map is: shown in the mode of coordinate single-point by the target localization point kept after filtering, shown in the mode of coordinate point group by all target localization points hidden after filtration.
Wherein, during mode display-object anchor point with coordinate point group, the geographic coordinate of the coordinate point group of display is the geographic coordinate of filter center's point.In addition, when showing in the mode of coordinate point group, the number of the target localization point hidden in this coordinate point group can be demarcated in of a coordinate point group less setting range.
That is, distance with target localization point is filtered in same pixel all target localization points (adopting the one in above-mentioned two kinds of filter types to determine whether to meet) in radius filters hiding, and shows these target localization points hidden by the mode of a point group.Wherein, choosing of filter center's point can only choose one within the scope of whole current display area, also can whole viewing area scope be selected multiple, as shown in Figure 5, whole large solid line housing in figure represents current display area scope, the point 1 of all displays in figure, point 2, all target localization points, have selected target localization point point 1 in this figure and put 8 as filter center's point, filter radius as shown in FIG., a 1-point 6 can be known through calculating, and point 13 is all positioned at " pixel filters square " with the distance of point 1, these points all need to hide, and show this group point by point group 1, the impact point number hidden in point group 1 is 7, the distance of some 7-10 and 8 is also all positioned at " pixel filters square ", and these points all need to hide, and show this group point by point group 2, and the number of the target point group hidden in point group 2 is 4.
Method and system of the present invention, reduce with map rank, merge anchor point step by step, and with succinct icon Uniform Name " point group title ", can not cause and obscure.Amplifying with map rank, step by step anchor point is peeled off " point group ", being separated display gradually by exceeding the target localization point filtered in radius, and the Old Name of reducible one-tenth target localization point, as shown in Figure 5.When reducing, can narrow down on map and only having a point group icon mark, can be amplified to until each target localization point demonstrates position in region.In addition, the personalization set as required for coordinate point group can also check setting, as shift to when mouse or touch-control to point group time, the attribute list (comprising: target designation, affiliated unit, align_type etc.) of all target localization points of this point group can be ejected; Also can at mouse-click point group, eject the precise position information list (comprising: the speed, direction etc. of anchor point ID, longitude and latitude, target movement) of all target localization points of this point group, as shown in Figure 6 in the list of ejection precise position information, certain anchor point can be selected arbitrarily to separate " point group " immediately and to show its locating information and other attributes.Wherein, the above-mentioned personal settings for coordinate point group can by existing techniques in realizing.
Method and system of the present invention are applicable to the display of map on all terminal devices, comprise computing machine, mobile intelligent terminal etc.The method and system are particularly useful for the display to a certain feature impact point site, as shown in Figure 5, point 11 is impact points that user needs to pay close attention to, other impact point can be shown in point group mode by method of the present invention, only have and a little 11 to show with independent coordinate points, display result more meets user's request.The method and system can be applied in " Big Dipper Vehicle Orientation, Monitoring & Control System ", when showing positioned vehicle with rank on a certain map, calculated, show display with congruent point (coordinate point group) and single anchor point simultaneously in viewing area by coordinate filtering algorithm; Along with mouse slip enlarged map rank, then see that congruent point is separated into sub-congruent point and anchor point gradually; Reduce map rank along with mouse slides, then see that congruent point and anchor point are gathered into father's congruent point gradually.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technology thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. multiple anchor point merges a method for classification display, comprises the following steps:
(1) start map application, trigger map convergent-divergent as required, and the current display area scope of map after obtaining convergent-divergent;
(2) inquire about the geographic coordinate of current display area scope internal object anchor point, and geographic coordinate is converted into the pixel coordinate on map;
(3) determine that the pixel on map filters radius, and filter according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtain the pixel coordinate of the target localization point after filtering;
(4) pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.
2. a kind of multiple anchor point as claimed in claim 1 merges the method for classification display, it is characterized in that, in step (1), also comprise the current zoom rank obtaining map after convergent-divergent, in step (3), filter radius according to the pixel on the current zoom rank determination map of map after convergent-divergent.
3. a kind of multiple anchor point as claimed in claim 1 merges the method for classification display, it is characterized in that, in step (2), when geographic coordinate being converted into the pixel coordinate on map, record the coordinate ID of geographic coordinate corresponding to each pixel coordinate, in step (4), when pixel coordinate is converted to geographic coordinate, the coordinate ID corresponding according to pixel coordinate obtains the geographic coordinate of its correspondence.
4. a kind of multiple anchor point as claimed in claim 1 merges the method for classification display, it is characterized in that, in step (3), the concrete mode of filtering the pixel coordinate of radius filtration current display area scope internal object anchor point according to pixel comprises:
Determine the filter center's point within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds square, if target localization point drops within described square, then vanishing target anchor point, then retains target localization point if not.
5. a kind of multiple anchor point as claimed in claim 1 merges the method for classification display, it is characterized in that, in step (3), the concrete mode of filtering the pixel coordinate of radius filtration current display area scope internal object anchor point according to pixel comprises:
Determine the filter center's point within the scope of current display area, calculate the distance of target localization point and filter center's point;
Check whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retain target localization point if not.
6. a kind of multiple anchor points as described in claim 4 or 5 merge the method for classification display, it is characterized in that, in step (4), the pixel coordinate of the target localization point after filtering are converted into geographic coordinate and the concrete mode of demarcating display on map is:
The target localization point kept after filtration is shown in the mode of coordinate single-point, all target localization points hidden after filtration are shown in the mode of coordinate point group.
7. a kind of multiple anchor point as claimed in claim 6 merges the method for classification display, it is characterized in that, during mode display-object anchor point with coordinate point group, the geographic coordinate of the coordinate point group of display is the geographic coordinate of filter center's point.
8. a kind of multiple anchor point as claimed in claim 7 merges the method for classification display, it is characterized in that, described filter center's point is any point within the scope of current display area or is a target localization point within the scope of current display area.
9. multiple anchor point merges a system for classification display, comprising:
Engine map module, for starting map application, triggers map convergent-divergent as required, and the current display area scope of map after obtaining convergent-divergent;
Coordinate enquiry module, for inquiring about the geographic coordinate of current display area scope internal object anchor point, and is converted into the pixel coordinate on map by geographic coordinate;
Coordinate filtering module, for determining that the pixel on map filters radius, and filtering according to pixel the pixel coordinate that radius filters current display area scope internal object anchor point, obtaining the pixel coordinate of the target localization point after filtering;
Coordinate display module, for the pixel coordinate of the target localization point after filtration is converted into geographic coordinate, and demarcates display on map.
10. a kind of multiple anchor point as claimed in claim 9 merges the system of classification display, and it is characterized in that, described coordinate filtering module comprises:
Metrics calculation unit, for determining the filter center's point within the scope of current display area, calculates the distance of target localization point and filter center's point;
Filter element, for checking whether the distance of target localization point and filter center's point is greater than pixel and filters radius, if then vanishing target anchor point, then retains target localization point if not.
11. a kind of multiple anchor points as claimed in claim 9 merge the system of classification display, and it is characterized in that, described coordinate filtering module comprises:
Filter square construction unit, for determining the filter center's point within the scope of current display area, centered by filter center's point, the length of filtering radius with pixel builds square.
Filter element, for checking whether target localization point drops within described square, if then vanishing target anchor point, then retains this demarcation site if not.
12. a kind of multiple anchor points as described in claim 10 or 11 merge the system of classification display, and it is characterized in that, described coordinate display module comprises:
Single-point display unit, for showing the target localization point kept after filtration in the mode of coordinate single-point;
Point group display unit, shows in the mode of coordinate point group for just filtering rear hiding all target localization points.
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Application publication date: 20150610 |