CN102519452B - A kind of display method for electronic map and terminal - Google Patents
A kind of display method for electronic map and terminal Download PDFInfo
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- CN102519452B CN102519452B CN201110439036.6A CN201110439036A CN102519452B CN 102519452 B CN102519452 B CN 102519452B CN 201110439036 A CN201110439036 A CN 201110439036A CN 102519452 B CN102519452 B CN 102519452B
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Abstract
The present invention is applicable to electronic map field, provides a kind of display method for electronic map, and described method comprises: obtain current display control information, comprises current map displaying ratio chi, map denotation visual angle and display position information; Generate according to current display control information and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building.The corresponding embodiment of the present invention additionally provides a kind of electronic map display terminal.By implementing the present invention, electronic chart can be realized and represent, user can be understood the carrying out of urban geography environmental information more intuitively.
Description
Technical field
The invention belongs to area of geographic information, particularly relate to a kind of display method for electronic map and terminal.
Background technology
In recent years, along with the constantly universal of internet and navigation application and development, electronic chart because of with internet and navigational hardware for carrier and rapid rising, map has gone to internet, PC and vehicle-mounted and handheld device from paper.People can search for interested place, driving route and public bus network etc. easily in electronic chart, for trip arrangement provides reference proposition.And it is well-known, we live in a very three-dimensional real world, and traditional two-dimensional map only all carries out the simplify processes to equatorial projection to the various geographic object be in three dimensions, cause the disappearance of geometric position information on third dimension direction (i.e. vertical direction) and space topological information, intactly can not reflect objective world, thus the geography information that user gets from traditional two-dimensional map is directly perceived not.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of display method for electronic map and terminal, is intended to solve existing map loss of learning in vertical direction, causes that the cartographic information that provides to user is sufficiently complete, problem intuitively.
The embodiment of the present invention is achieved in that and provides a kind of display method for electronic map, and described method comprises:
Obtain current display control information, comprise current map displaying ratio chi, map denotation visual angle and display position information, described display position information is navigation current location or map view position;
Generate according to current display control information and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building.
Wherein, described generate according to current display control information and show electronic chart also comprise:
In the electronic chart of described generation, reflect the road elevation information of each abstract road, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata;
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
Wherein, described road information also comprises: for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road.
Wherein, described generate according to current display control information and show electronic chart also comprise:
According to the roads classification rule preset and current map displaying ratio chi, calculate the width of the abstract road of different brackets and color in, and display view angle and have an X-rayed the width of regular gradual change abstract road according to the map.
Wherein, described generate according to current display control information and show electronic chart also comprise:
When described display control information also comprises navigation route information, according to described navigation route information its institute on abstract road show navigator path, described guidance path from different through coloring in of abstract road.
Wherein, described generate according to current display control information and show electronic chart also comprise:
Detect abstract road under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
Accordingly, the embodiment of the present invention additionally provides a kind of electronic map display terminal, and described electronic map display terminal comprises:
Electronic map database, for the road data in storing electronic map and block, three-dimensional city data;
Control information module, for obtaining current display control information, comprises current map displaying ratio chi, map denotation visual angle and display position information, and described display position information is navigation current location or map view position;
Map display module, generate for the current display control information that gets according to control information module and electronic map database and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises ground, block and three-dimensional city building.
Wherein, described map display module also comprises:
Elevation information control module, for reflecting the road elevation information of each abstract road in the electronic chart of described generation, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata;
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
Wherein, the road information that described map display module generates also comprises: for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road.
Wherein, described map display module also comprises:
Road control module, for according to the roads classification rule preset and current map displaying ratio chi, calculates the width of the abstract road of different brackets and colors in, and display view angle and have an X-rayed the width of regular gradual change abstract road according to the map.
Wherein, described map display module also comprises:
Guidance path display unit, for when the display control information that described control information module gets also comprises navigation route information, according to described navigation route information its institute on abstract road show navigator path, described guidance path from different through coloring in of abstract road.
Wherein, described map display module also comprises:
Semi-transparent control module, for detect abstract road under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
In embodiments of the present invention, by representing three-dimensional block and the abstract road with road elevation information on city map simultaneously, achieve electronic chart and represent, user can be understood the carrying out of urban geography environmental information more intuitively.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of display method for electronic map that the embodiment of the present invention provides;
Fig. 2 is the structural representation of a kind of electronic map display terminal that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the realization flow of a kind of display method for electronic map that the embodiment of the present invention provides, and details are as follows:
Step S110, obtains current display control information, at least comprises current map displaying ratio chi, map denotation visual angle and display position information, and described display position information is navigation current location or map view position.
In specific implementation, the map-indication method of the present embodiment can be implemented on location-based service terminal, described location-based service terminal can have two kinds of mode of operations, one is map view pattern, want the electronic chart in the geographic position checked according to the operation display user of user, corresponding display position information is map view position; Two is navigation modes, and the display position information of the map under this pattern is navigation current location, and namely the current position that calculates according to gps signal of terminal, can change map denotation position along with the change of terminal position.No matter be a certain position coordinates that the navigation current location obtained under the map view position or navigation mode got under map view pattern uniquely can both correspond in electronic chart.
Described map denotation visual angle can comprise visual angle horizontal direction and two, viewing angles-both vertical direction component, wherein viewing angles-both vertical direction and map simulation visual angle and the angle that formed of level ground, this angle more close to 90 ° then map denotation effect more close to two-dimensional map, under same ratio chi, explicitly graph region scope is also less, and in specific implementation, this viewing angles-both vertical direction can be a pre-set value.
Further, when location-based service terminal is under navigation mode, gets current display control information and can also comprise travel direction, speed even navigation route information etc.
Step S120, generate according to current display control information and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road in order to indicate road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building.
In specific implementation, described road measuring point is process by data acquisition the information obtained, comprise geographic coordinate and road elevation information, the shape of road can be reflected by line, wherein road elevation information is for representing the relative height between each road and between road and ground, the relative height value, absolute altitude value etc. on the pavement of road distance ground of this road measuring point position such as can be adopted as described road elevation information, represent that the road measuring point of same path connects and obtain center line, generate described abstract road mark road according to center line.Exemplary, generate according to center line the mode indicating abstract road and can adopt following scheme: each road measuring point is linked to be line segment, and line and road axis centered by the line formed by this line segment, calculate the road display width at each point place on line segment, described road display width and color in can according to road self attributes (comprising category of roads), the roads classification rule preset and current map displaying ratio chi are determined, determine center line, road display width and just can obtain described abstract road after coloring in, determine that the abstract road of center line and width carries out lifting according to road elevation information finally by Procedure modeling by above-mentioned, just obtain the three-dimensional abstract road of " erecting ".The described abstract road of every bar obtained by center line may be used for representing and comprises two-way entire road, also the road on a direction only can be represented for the abstract road of every bar, comprise two-way road to be made up of 2 (can be 4 during You Fu road) abstract roads, even only can represent the track on a road for the abstract road of every bar.
The width of abstract road depends on the have a lot of social connections coefficient corresponding with engineer's scale and road grade.Coefficient of having a lot of social connections is kept in the electronic map database of terminal.Described three-dimensional block information can also comprise ground, block, such as comprise the elements such as People's Bank of China ground, greenery patches, water system, described three-dimensional city building can generate according to building its data information modeling, described building its data information can comprise building height (or floor+floor height), building type, Urban style etc., allows the different three-dimensional city of above-mentioned data characteristic build and has different modeling effects.
Further, the road elevation information of each abstract road can also be reflected in the electronic chart of described generation, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata; And/or
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
Preferably can also according to perspective regular gradual change described in road display width: under obtaining current engineer's scale according to road width list each in electronic chart and road grade, described road width is K pixel, then setting this road display width of eye-level display place is K pixel, be zero according to Perspective Principles end point place road display width, and then each pixel place road display width and the proportional relation of this road display width of eye-level display place on road axis, its ratio is identical to the ratio of the vertical range of end point with eye-level display to the vertical range of end point with this pixel.
Optionally, described road information also comprises for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road, specifically can road width or track quantity reach necessarily require time, just need to generate such isolation strip between reverse main stem or main stem/auxiliary road, this isolation strip also can, with certain elevation information, make road information more be rich in stereoscopic sensation.
Further, when the described display control information got in step S110 also comprises navigation route information, the method flow process can also comprise: after the above-mentioned electronic chart of generation, also according to described navigation route information its institute on abstract road show navigator path, described guidance path from different through coloring in of abstract road, and the guidance path of preferably this display is with direction.
Optionally, generate above-mentioned comprise three-dimensional city building three-dimensional block information after, the abstract road of further detection under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
It should be noted that, in order to make follow-up display more level and smooth, usually not only generating the current interface viewing area map area that can show when generating above-mentioned electronic chart, but generate more surplus in advance and be stored in the buffer zone of terminal.Such as under map view pattern, the electronic chart that current map browses a region more wider than viewing area around position can be generated; Under navigation mode then can according to the travel direction in display control information, speed even navigation route information generate the electronic chart region of front region in advance.
In specific implementation, except showing the electronic chart of current generation, can also by temporary in the buffer face time navigation picture with the seamless animation that Shows Picture continuously of the intrinsic display frequency of navigational system place hardware, coordinate with hardware display device, reach navigation picture and to move with navigation object or user browses the movement of position constantly with the effect of engineer's scale smooth change.
The structural representation of a kind of electronic map display terminal that Fig. 2 provides for the embodiment of the present invention, for convenience of description, illustrate only part related to the present invention.Electronic map display terminal particularly in the present embodiment comprises:
Electronic map database 10, for the road data in storing electronic map and block, three-dimensional city data;
Control information module 20, for obtaining current display control information, comprises current map displaying ratio chi, map denotation visual angle and display position information, and described display position information is navigation current location or map view position.
In specific implementation, the map display terminal of the present embodiment can be implemented on location-based service terminal, described location-based service terminal can have two kinds of mode of operations, one is map view pattern, want the electronic chart in the geographic position checked according to the operation display user of user, corresponding display position information is map view position; Two is navigation modes, and the display position information of the map under this pattern is navigation current location, and namely the current position that calculates according to gps signal of terminal, can change map denotation position along with the change of terminal position.No matter be a certain position coordinates that the navigation current location obtained under the map view position or navigation mode got under map view pattern uniquely can both correspond in electronic chart.
Described map denotation visual angle can comprise visual angle horizontal direction and two, viewing angles-both vertical direction component, wherein viewing angles-both vertical direction and map simulation visual angle and the angle that formed of level ground, this angle more close to 90 ° then map denotation effect more close to two-dimensional map, under same ratio chi, explicitly graph region scope is also less, and in specific implementation, this viewing angles-both vertical direction can be a pre-set value.
Further, when location-based service terminal is under navigation mode, control information module 20 gets current display control information can also comprise travel direction, speed even navigation route information etc.
Map display module 30, generate for the current display control information that gets according to control information module and electronic map database and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road in order to indicate road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building.
In specific implementation, described road measuring point is obtained by data acquisition processing and be stored in the information in electronic map database 10, its content comprises geographic coordinate and road elevation information, position and the shape of road can be reflected by connecting described road measuring point line, wherein road elevation information is for representing the relative height between each road and between road and ground, such as can adopt the relative height value on the pavement of road distance ground of this road measuring point position, absolute altitude values etc. are as described road elevation information, represent that the road measuring point of same path connects and obtain center line, map display module 30 generates described abstract road mark road according to center line.Exemplary, map display module 30 generates according to center line the mode indicating abstract road can adopt following scheme: each road measuring point is linked to be line segment, and line and road axis centered by the line formed by this line segment, calculate the road display width at each point place on line segment, described road display width and color in can according to road self attributes (comprising category of roads), the roads classification rule preset and current map displaying ratio chi are determined, determine that the abstract road of center line and width carries out lifting according to road elevation information finally by Procedure modeling by above-mentioned, just obtain the three-dimensional abstract road of " erecting ".The described abstract road of every bar obtained by center line may be used for representing and comprises two-way entire road, also the road on a direction only can be represented for the abstract road of every bar, comprise two-way road to be made up of 2 (can be 4 during You Fu road) abstract roads, even only can represent the track on a road for the abstract road of every bar.The width of abstract road depends on the have a lot of social connections coefficient corresponding with engineer's scale and road grade.Coefficient of having a lot of social connections is kept in electronic map database 10.Described three-dimensional block information can also comprise ground, block, such as comprise the elements such as People's Bank of China ground, greenery patches, water system, described three-dimensional city building can generate according to building its data information modeling, building its data information can comprise building height (or floor+floor height), building type, Urban style etc., the different three-dimensional city of above-mentioned data characteristic is built and has different modeling effects.
In specific implementation, map display module 30 except display current display area can show electronic chart, can also by temporary in the buffer face time navigation picture with the seamless animation that Shows Picture continuously of the intrinsic display frequency of navigational system place hardware, coordinate with hardware display device, reach navigation picture and to move with navigation object or user browses the movement of position constantly with the effect of engineer's scale smooth change.
Further, described map display module 30 can also comprise elevation information control module, for reflecting the road elevation information of each abstract road in the electronic chart of described generation, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata;
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
Preferably map display module 30 can further include road control module, for the regular and current map displaying ratio chi according to the roads classification preset, calculate the width of the abstract road of different brackets and color in, and the width of display view angle and perspective regular gradual change abstract road according to the map.Such as according to the regular gradual change of perspective, the mode of road display width can be: under obtaining current engineer's scale according to road width list each in electronic chart and road grade, described road width is K pixel, then setting this road display width of eye-level display place is K pixel, be zero according to Perspective Principles end point place road display width, and then each pixel place road display width and the proportional relation of this road display width of eye-level display place on road axis, its ratio is identical to the ratio of the vertical range of end point with eye-level display to the vertical range of end point with this pixel.
Optionally, the road information that described map display module 30 generates also comprises for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road, specifically can road width or track quantity reach necessarily require time, just need to generate such isolation strip between reverse main stem or main stem/auxiliary road, this isolation strip also can, with certain elevation information, make road information more be rich in stereoscopic sensation.
Further, described map display module 30 also comprises guidance path display unit, for when the display control information that described control information module gets also comprises navigation route information, according to described navigation route information in its institute show navigator path on abstract road, described guidance path from different through coloring in of abstract road, can also with direction on the guidance path of preferably described display.
Optionally, described map display module 30 also comprises semi-transparent control module, for detect abstract road under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
It should be noted that, in order to make follow-up display more level and smooth, map display module 30 not only generates the current interface viewing area map area that can show usually when generating above-mentioned electronic chart, but generates more surplus in advance and be stored in the buffer zone of terminal.Such as under map view pattern, map display module 30 can generate the electronic chart that current map browses a region more wider than viewing area around position; And time under navigation mode, map display module 30 can according to the travel direction in display control information, speed even navigation route information generate the electronic chart region of front region in advance.
Display method for electronic map in the embodiment of the present invention and terminal can be implemented on location-based service terminal, and described location-based service terminal refers to that equipment itself possesses the various function of being correlated with position or equipment by the equipment of far-end online mode to user-provided location service and correlation function thereof.Location-based service terminal can be computer, mobile phone, navigator etc.Location-based service terminal is for navigator, its principle of work is the position coordinates of navigator determination ad-hoc location, it is mated with the position coordinates recorded in the electronic chart self stored, determines with this accurate location of navigation object in electronic chart carrying this navigator.Navigator can be mobile unit, portable navigation device, cell phone apparatus etc.
In embodiments of the present invention, by representing three-dimensional block and the abstract road with road elevation information on navigation map simultaneously, achieve electronic chart to represent, user especially can be understood more intuitively urban geography environmental information in navigation procedure.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, any amendment done within all spirit in inventive embodiments and principle, equivalently to replace and improvement etc., within the protection domain that all should be included in inventive embodiments.
Claims (12)
1. a display method for electronic map, is characterized in that, described method comprises:
Obtain current display control information, comprise current map displaying ratio chi, map denotation visual angle and display position information, described display position information is navigation current location or map view position;
Generate according to current display control information and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building;
Described abstract road comprises three-dimensional abstract road, and described three-dimensional abstract road is determined that the abstract road of center line and width carries out lifting according to road elevation information and obtains.
2. display method for electronic map as claimed in claim 1, is characterized in that, described generate according to current display control information and show electronic chart also comprise:
In the electronic chart of described generation, reflect the road elevation information of each abstract road, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata;
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
3. display method for electronic map as claimed in claim 1, it is characterized in that, described road information also comprises: for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road.
4. display method for electronic map as claimed in claim 1, is characterized in that, described generate according to current display control information and show electronic chart also comprise:
According to the roads classification rule preset and current map displaying ratio chi, calculate the width of the abstract road of different brackets and color in, and display view angle and have an X-rayed the width of regular gradual change abstract road according to the map.
5. the display method for electronic map according to any one of claim 1-4, is characterized in that, described generate according to current display control information and show electronic chart also comprise:
When described display control information also comprises navigation route information, according to described navigation route information its institute on abstract road show navigator path, described guidance path from different through coloring in of abstract road.
6. display method for electronic map as claimed in claim 5, is characterized in that, described generate according to current display control information and show electronic chart also comprise:
Detect abstract road under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
7. an electronic map display terminal, is characterized in that, described electronic map display terminal comprises:
Electronic map database, for the road data in storing electronic map and block, three-dimensional city data;
Control information module, for obtaining current display control information, comprises current map displaying ratio chi, map denotation visual angle and display position information, and described display position information is navigation current location or map view position;
Map display module, generate for the current display control information that gets according to control information module and electronic map database and show electronic chart, described electronic chart comprises road information and three-dimensional block information, wherein: described road information comprises abstract road, described abstract road is for according to reflecting that center line that each road measuring point of road elevation information is linked to be generates; Described three-dimensional block information comprises three-dimensional city building; Described abstract road comprises three-dimensional abstract road, and described three-dimensional abstract road is determined that the abstract road of center line and width carries out lifting according to road elevation information and obtains.
8. electronic map display terminal as claimed in claim 7, it is characterized in that, described map display module also comprises:
Elevation information control module, for reflecting the road elevation information of each abstract road in the electronic chart of described generation, comprising:
When at least two abstract roads have crossing, according to the road elevation information of the road measuring point of each abstract road intersection leg, higher abstract road is arranged on upper strata;
Described abstract road is reflected by display shade or the mode of transparent effect and height relation between other abstract roads or ground.
9. electronic map display terminal as claimed in claim 7, is characterized in that, the road information that described map display module generates also comprises: for isolating rightabout adjacent road or the isolation strip for isolating main stem and auxiliary road.
10. electronic map display terminal as claimed in claim 7, it is characterized in that, described map display module also comprises:
Road control module, for according to the roads classification rule preset and current map displaying ratio chi, calculates the width of the abstract road of different brackets and colors in, and display view angle and have an X-rayed the width of regular gradual change abstract road according to the map.
11. electronic map display terminal according to any one of claim 7-10, it is characterized in that, described map display module also comprises:
Guidance path display unit, for when the display control information that described control information module gets also comprises navigation route information, according to described navigation route information its institute on abstract road show navigator path, described guidance path from different through coloring in of abstract road.
12. electronic map display terminal as claimed in claim 11, it is characterized in that, described electronic map display terminal also comprises:
Semi-transparent control module, for detect abstract road under current map display view angle and/or guidance path whether built by described three-dimensional city or other abstract roads block, if then the part that described abstract road and/or guidance path are blocked carried out translucent display or do not show.
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