CN104215256A - Method for displaying vehicle travel route on map - Google Patents
Method for displaying vehicle travel route on map Download PDFInfo
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- CN104215256A CN104215256A CN201310221095.5A CN201310221095A CN104215256A CN 104215256 A CN104215256 A CN 104215256A CN 201310221095 A CN201310221095 A CN 201310221095A CN 104215256 A CN104215256 A CN 104215256A
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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
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/367—Details, e.g. road map scale, orientation, zooming, illumination, level of detail, scrolling of road map or positioning of current position marker
Abstract
The invention discloses a method for displaying a vehicle travel route on a map. The method comprising the steps of: S1. judging whether the reported vehicle trajectory points are GPS drift points, if not, executing S2, if yes, abandoning the trajectory points, and returning to the S1; S2. matching the trajectory points with roads on a pre-stored map; S3. looking for road points matching with the trajectory points on the roads matching the trajectory points, and setting the road points as deviation rectification points of the trajectory points; and S4. finding out the deviation rectification points of all non-GPS drift points' trajectory points, and then connecting all the deviation rectification points by a fitting curve. By implementing the method provided by the invention, the travel route of a GPS vehicle can truly and accurately reappear on the electronic map, and at the same time the playback track looks smoother and more beautiful.
Description
Technical field
The present invention relates to vehicular traffic field of navigation technology, particularly relate to a kind of method showing route or travel by vehicle on map.
Background technology
Trace playback, refers to according to the data in the vehicles traveling process of navigation system records, to the operation that the course of the public tool of traffic is reappeared in geographic information map (electronic chart).
The maximum navigational system of current use is gps system, and the track of vehicle playback based on gps system has become a kind of popular widely used technology.But easily there is following technical matters in the track of vehicle playback at present based on gps system:
1, due to hysteresis quality during gps system collection data, when gps system receives the locator data of vehicle, because vehicle is in traveling process always, likely there is comparatively big error with the physical location of vehicle in this locator data, actual with it for the track of vehicle making electronic chart shows travel route is existed range deviation by this.
2, to be generally direct straight line by the traveling-position that vehicle timing reports couple together the track of vehicle on electronic chart is formed, and entirety is a polygonal broken line, seems level and smooth not, affects attractive in appearance.
Summary of the invention
The technical problem to be solved in the present invention is, for track of vehicle and large, the inaesthetic above-mentioned defect of actual travel path deviation of playback on electronic chart in prior art, provide a kind of can on electronic chart accurately and the method for flow display route or travel by vehicle.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method showing route or travel by vehicle on map, is characterized in that, said method comprising the steps of:
S1. self current residing position is periodically reported information desk as tracing point by vehicle, and information desk judges whether the track of vehicle point reported is GPS shift point, if not, then performs step S2, if so, then gives up described tracing point, get back to step S1;
S2. described tracing point is mated with the road information prestored;
S3. on the road that there is the information matched with described tracing point, find the road waypoint of mating with described tracing point, and described road waypoint is set to the correction point of described tracing point;
S4., after finding the correction point of the tracing point of all non-GPS shift point, all corrections point is connected with matched curve.
Preferably, described step S1 comprises:
S11. from the track of vehicle point reported preset a reference point, and record described reference point on call time;
S12. calculate the spacing of described tracing point and described reference point and report the mistiming;
S13. calculate spacing and the ratio of described mistiming of described tracing point and described reference point, if described ratio is in preset range, then judge that described tracing point is not GPS shift point, if do not exist, then judge that described tracing point is GPS shift point.
Preferably, on-site address when the reference point in described step S11 is described vehicle launch, if described vehicle is out of service, when being restarted by described vehicle, on-site address is updated to reference point.
Preferably, the reference point in described step S11 is a tracing point before described tracing point.
Preferably, described step S2 comprises:
S21. according to the latitude and longitude information of described tracing point, in the road information prestored, search the road of the latitude and longitude information containing described tracing point, if find a road, then perform step S23, if find at least two road, then perform step S22;
S22. according to other at least one tracing point adjacent with described tracing point, from described at least two road, select a road, and selected road is set to the coupling road of described tracing point;
S23. a described road is set to the coupling road of described tracing point.
Preferably, in described step S22, if the other tracing point adjacent with described tracing point is multiple, and in the plurality of other tracing point at least half be in a road in described many roads, then described road is set to the coupling road of described tracing point.
Preferably, described step S3 comprises:
S31. described tracing point and described distance of mating road Shang Ge road waypoint is calculated;
S32. more all distances, find out with described tracing point apart from minimum road waypoint, and described road waypoint is set to the correction point of described tracing point;
S33. on the map with presetting the described correction point of mark mark.
Preferably, described step S4 comprises:
S41. default fitting function is called;
S42. all correction points are connected along described with the curve that the direction that described tracing point has the road of the information matched generates with the fitting function called.
Implement method of the present invention, the comparatively big error that the gps data that reports and actual travel point exist can be eliminated, make track of vehicle that electronic chart shows more accurately true; Also the track of vehicle on electronic chart can be made to seem more smoothly attractive in appearance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic flow sheet of the inventive method preferred embodiment;
Fig. 2 is the schematic flow sheet of the preferred embodiment of step S1 in specific implementation figure;
Fig. 3 is the schematic flow sheet of the preferred embodiment of step S2 in specific implementation figure;
Fig. 4 is the schematic flow sheet of the preferred embodiment of step S3 in specific implementation figure;
Fig. 5 is the trace playback display effect schematic diagram without matching;
Fig. 6 is the trace playback display effect schematic diagram after matching.
Embodiment
As shown in Figure 1, the present invention shows the method for route or travel by vehicle on map, comprises the following steps:
S1. self current residing position is periodically reported information desk as tracing point by vehicle, and information desk judges whether the track of vehicle point reported is GPS shift point, if not, then perform step S2, if so, then give up described tracing point, get back to step S1, continue to judge next tracing point.GPS drift refers to when GPS locates, locator data and the actual bit of track of vehicle point are equipped with larger gap, and appearance and actual path have the continuous path of certain intervals at the volley, in the present invention, this tracing point larger with physical location gap are called GPS shift point.
Tracing point be vehicle GPS positioning system in the actual locating information of carrying out the vehicle calculated in process of vehicle, this locating information is the latitude and longitude information that vehicle travels each traveling-position in actual road conditions.And there is unfixed error when calculating the locating information of vehicle in gps system, the point that big error produces and GPS shift point.In this step; in order to avoid tracing point that error is larger affects the whole structure of trace playback; first the error range of gps system when calculating vehicle location information will be added up in advance; then criterion is preset according to this error range; concrete criterion can be the distance of this tracing point a and preset reference point, also can be the scope of the unit interval operating range of vehicle belonging to this tracing point.If tracing point a meets criterion, then carry out next step operation, if do not meet criterion, then give up this tracing point a.
S2. tracing point is mated with the road information prestored.
If tracing point a is not GPS shift point, the concrete orientation of tracing point on electronic chart to be determined further.In this step, the present invention will not be that GPS shift point tracing point mates with the road on electronic chart, in geographic information database, each point latitude and longitude information in the scope that the circumscribed rectangle that the longitude and latitude scope of the every bar road on the electronic chart prestored is this road covers.If the latitude and longitude information of tracing point a is within the scope of the longitude and latitude of a certain bar road A of electronic chart, so this road A is the coupling road of this tracing point a.
In this step, if the road comprising the latitude and longitude information of this tracing point a has more than two, so can with further reference to preset with this tracing point a before and after concrete and that road of adjacent some tracing points match, in this step, concrete with reference to those adjacent track points, with reference to several tracing point and specifically how with reference to being preset by operator, can only with reference to and that prior to it report at least 1 tracing point adjacent with this tracing point a, also can only with reference to adjacent with this tracing point a and be later than its at least 1 tracing point reported, also can with reference to front and back separately at least one tracing point adjacent with this tracing point a, best reference more than three, if most a certain bar A be in more than two roads in reference point, namely the so current tracing point a finding coupling road is within the scope of the longitude and latitude of A road, this road A is the coupling road of this tracing point a.
In this step, if can not find the road mated with tracing point a, then first can be upgraded electronic chart by Geographic Information System, and then find the road mated with this tracing point a.If the coupling road of tracing point a still cannot be found, then can all tracing points of critical-path analysis, find out all tracing points that cannot find coupling road, according to the newly-built road of the latitude and longitude information of these tracing points, this newly-built road is the coupling road of these tracing points.
S3. on the road having the information matched with described tracing point, find the road waypoint of mating with described tracing point, and described road waypoint is set to the correction point of described tracing point, this road waypoint is some electronic chart forming this road.
In this step, tracing point a is replaced by the road waypoint on coupling road, and the road waypoint b of tracing point a can be replaced to be set to the correction point of tracing point a, then demarcate out with the mark preset, the mark preset can be red circle, the triangle of a black or a mark for other shape.By comparing composition coupling all roads waypoint of road and the distance of tracing point a on electronic chart to find correction point.
S4., after finding the correction point of the tracing point of all non-GPS shift point, all corrections point is connected with matched curve.
In this step, coupled together by the correction marked point with matched curve in step S, form a level and smooth geometric locus, this smooth curve is the history travel route having reproduced GPS vehicle really and accurately.
In the specific operation process of this step, first to call default fitting function, then according to this fitting function, all corrections point be connected along road direction curve.
As shown in Figure 2, in specific implementation Fig. 1, the step of step S1 is as follows:
S11. reference point is set, and record reports the time of reference point.
In this step, on-site address when reference point can be vehicle launch, if in driving process, this vehicle is temporarily out of service, when then being restarted by this vehicle, on-site address is updated to reference point, the latitude and longitude information only recording time when the new Startup time of this car weight reports enabling address longitude and latitude geography information and report.
In this step, reference point also can be tracing point a before any one tracing point, but will guarantee the moment between tracing point a and reference point, vehicle is temporarily out of service.If centre has out of service, then to record the time out of service, pay attention to when calculating the spacing of tracing point and reference point in step s 12.
S12. calculate the spacing of tracing point a and preset reference point and report the mistiming.
S13. calculate spacing and the ratio of mistiming, if this ratio is in preset range, this tracing point a is not GPS shift point, then perform step S2, if do not exist, then give up tracing point a.The scope of the distance that vehicle belonging to tracing point a travels within the unit interval in the scope preset and the present invention.
As shown in Figure 3, in specific implementation Fig. 1, the step of step S2 is as follows:
S21. according to the latitude and longitude information of tracing point a, pre-stored map is searched the road containing its latitude and longitude information, if find a road, then perform step S23, if find at least two road, then perform step S22.
S22. according at least two tracing points adjacent with tracing point a, from least two road step S21, select a road, and selected road is set to the coupling road of tracing point a.First add up at least two tracing points adjacent with tracing point a in this step and be in that road, if a road B wherein at least in above-mentioned at least many roads that are in of half, then this road B is set to the coupling road of tracing point a.
S23. that unique road in step S21 is set to the coupling road of tracing point a.
As shown in Figure 4, in specific implementation Fig. 1, the step of step S3 is as follows:
S31. tracing point a mates road Shang Ge road waypoint distance with it is calculated.
S32. more all distances calculated, find out apart from minimum road waypoint, and Bing Jianggai road waypoint is set to the correction point of tracing point a.
S33. on electronic chart, above-mentioned correction point is marked with presetting mark.
Fig. 5 and Fig. 6 be respectively according to the trace playback display effect schematic diagram without matching of data in table one to table three and matching after trace playback display effect schematic diagram.
Table one:
| Track period | Tracing point 1 | Tracing point 2 | Tracing point 3 | Tracing point 4 | Tracing point 5 |
| Original longitude | 94.299835 | 94.299946 | 94.300355 | 94.301384 | 94.302696 |
| Original latitude | 34.192997 | 34.193698 | 34.194512 | 34.194460 | 34.194567 |
| Correction longitude | 94.299976 | 94.299776 | 94.300486 | 94.301448 | 94.302601 |
| Correction latitude | 34.193109 | 34.193723 | 34.194384 | 34.194625 | 34.194437 |
Table one:
| Track period | Tracing point 6 | Tracing point 7 | Tracing point 8 | Tracing point 9 | Tracing point 10 |
| Original longitude | 94.303588 | 94.304968 | 94.306032 | 94.306530 | 94.307703 |
| Original latitude | 34.194125 | 34.194685 | 34.195375 | 34.196243 | 34.196346 |
| Correction longitude | 94.303650 | 94.305074 | 94.305849 | 94.306707 | 94.307682 |
| Correction latitude | 34.194246 | 34.194613 | 34.195434 | 34.196102 | 34.196496 |
Table three:
| Track period | Tracing point 11 | Tracing point 12 | Tracing point 13 | Tracing point 14 | Tracing point 15 |
| Original longitude | 94.309138 | 94.310193 | 94.310492 | 94.311029 | 94.310897 |
| Original latitude | 34.196889 | 34.196562 | 34.197251 | 34.197910 | 34.198598 |
| Correction longitude | 94.309151 | 94.310266 | 94.310602 | 94.310783 | 94.311065 |
| Correction latitude | 34.196731 | 34.196750 | 34.197278 | 34.197978 | 34.198704 |
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (8)
1. on map, show a method for route or travel by vehicle, it is characterized in that, said method comprising the steps of:
S1. self current residing position is periodically reported information desk as tracing point by vehicle, and information desk judges whether the track of vehicle point reported is GPS shift point, if not, then performs step S2, if so, then gives up described tracing point, get back to step S1;
S2. described tracing point is mated with the road information prestored;
S3. on the road that there is the information matched with described tracing point, find the road waypoint of mating with described tracing point, and described road waypoint is set to the correction point of described tracing point;
S4., after finding the correction point of the tracing point of all non-GPS shift point, all corrections point is connected with matched curve.
2. the method showing route or travel by vehicle on map according to claim 1, is characterized in that, described step S1 comprises:
S11. from the track of vehicle point reported preset a reference point, and record described reference point on call time;
S12. calculate the spacing of described tracing point and described reference point and report the mistiming;
S13. calculate spacing and the ratio of described mistiming of described tracing point and described reference point, if described ratio is in preset range, then judge that described tracing point is not GPS shift point, if do not exist, then judge that described tracing point is GPS shift point.
3. the method showing route or travel by vehicle on map according to claim 2, it is characterized in that, on-site address when reference point in described step S11 is described vehicle launch, if described vehicle is out of service, when being restarted by described vehicle, on-site address is updated to reference point.
4. the method showing route or travel by vehicle on map according to claim 2, is characterized in that, the reference point in described step S11 is a tracing point before described tracing point.
5. the method showing route or travel by vehicle on map according to claim 1, is characterized in that, described step S2 comprises:
S21. according to the latitude and longitude information of described tracing point, in the road information prestored, search the road of the latitude and longitude information containing described tracing point, if find a road, then perform step S23, if find at least two road, then perform step S22;
S22. according to other at least one tracing point adjacent with described tracing point, from described at least two road, select a road, and selected road is set to the coupling road of described tracing point;
S23. a described road is set to the coupling road of described tracing point.
6. the method showing route or travel by vehicle on map according to claim 5, it is characterized in that, in described step S22, if the other tracing point adjacent with described tracing point is multiple, and in the plurality of other tracing point at least half be in a road in described many roads, then described road is set to the coupling road of described tracing point.
7. the method showing route or travel by vehicle on map according to claim 5, is characterized in that, described step S3 comprises:
S31. described tracing point and described distance of mating road Shang Ge road waypoint is calculated;
S32. more all distances, find out with described tracing point apart from minimum road waypoint, and described road waypoint is set to the correction point of described tracing point;
S33. on the map with presetting the described correction point of mark mark.
8. the method showing route or travel by vehicle on map according to claim 1, is characterized in that, described step S4 comprises:
S41. default fitting function is called;
S42. all correction points are connected along described with the curve that the direction that described tracing point has the road of the information matched generates with the fitting function called.
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