CN104765783A - Trajectory management method based on electronic map plotting - Google Patents
Trajectory management method based on electronic map plotting Download PDFInfo
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- CN104765783A CN104765783A CN201510125678.7A CN201510125678A CN104765783A CN 104765783 A CN104765783 A CN 104765783A CN 201510125678 A CN201510125678 A CN 201510125678A CN 104765783 A CN104765783 A CN 104765783A
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Abstract
The invention relates to a trajectory management method based on electronic map plotting. The historical evolution process of surface features are dynamically displayed, and the reason can be analyzed and the future tendency can be predicted according to the historical evolution process. The trajectory management method is based on the three major characteristics, namely spatial features, attribute features and time features, of spatial data. The time features and the spatial features are two important features of the trajectory management method. The historical trajectory management based on electronic map plotting is to firstly store the spatial data, filtering according to the time features of the polygons of the surface features and then displaying on the map. Besides, the trajectory management method also comprises a gis data acquisition function; the data acquisition refers to the plotting of the spatial data; the outline polygons of the surface features are plotted on a striograph.
Description
Technical field
The present invention relates to a kind of track management method marked and drawed based on electronic chart.
Background technology
Traditional atural object historical process develops in research, people cannot find out the historical variations process of atural object intuitively, could can only be found by the contrast of paper map, the professional being so only engaged in relevant Geographical Study just can be ready to think to contrast the differentiation in certain atural object such as desert, the differentiation in river, just can know what kind of evolution process they there occurs.And analyze the reason of differentiation like this and predict later trend, although this traditional method has certain scientific basis, there is obvious deficiency, too loaded down with trivial details, as needed a large amount of enquiry datas, complicated empirical analysis prediction, workload is large, and input cost is also large.
Geographic Information System (Geography Information System, GIS) there is the functions such as the input of spatial data, storage, management, analysis and output, it combines computer technology and spatial data, based on geospatial database, by a series of spatial operation and spatial analysis, for people provide spatial decision-making system information.GIS technology application is geographically the product of map Development of Morden.Its inevitable requirement to the comprehensive analysis of locus and temporal information.Traditional management information system, can only management attribute information, lacks the function of spatial information analysis and management.Geographic Information System has the function of attribute information and spatial information and temporal information integrated management and spatial analysis, a large amount of atural object polygon attribute can be brought in geodata by GIS spatial data storehouse, utilize the spatial analysis functions of GIS, researcher can carry out dynamic demonstration to the terrestrial object information of different time and intuitively compare very intuitively, and makes analysis and prediction based on the historical evolution of time to certain atural object.The spatial database technology of GIS and the spatial analysis functions of GIS create positive effect to the spatial information of atural object and the management of attribute information.
Summary of the invention
The present invention wants technical solution problem to be: the above-mentioned deficiency overcoming prior art, a kind of generation method that historical track marked and drawed based on electronic chart manages is provided, show the historical evolution of atural object dynamically, according to the process of historical development, reason can be analyzed and and prediction trend in the future.
The present invention is according to three large features of spatial data: space characteristics, attributive character, temporal characteristics.
Temporal characteristics and space characteristics are then two key properties of the present invention.The historical track management of marking and drawing based on electronic chart is exactly first storage space data and carries out filtering according to the polygonal temporal characteristics of atural object to be then shown on map.And the data acquisition function of gis, data be captured in the plotting namely referring to spatial data here, striograph is marked and drawn the outline polygon of atural object.
Data store: utilize PostgreSQL database postgreSql, postgis spatial spread, storage space data.
Table 1 atural object storage format in a database
| ID | date | geom | area | Other attribute |
| ID1 | Time1 | Geom1 | Area1 | ... |
| ID1 | Time2 | Geom2 | Area2 | ... |
| ... | ... | ... | ... | ... |
| IDn | Time n | Geom n | Arean | ... |
(note: ID represents the unique identifier of an atural object, and date represents the plotting time attribute of atural object, and geom represents the polygon object of atural object, and the area of atural object is marked and drawed in area representative, and other attribute then represents the correlation attribute information of atural object.)
According to storage format form, the ID of known same atural object is identical, but time attribute value is different, and the polygon that geom is corresponding is also different.So demonstrate the polygonal shape corresponding to each time according to time shaft.
In order to solve the wretched insufficiency that conventional art exists, a kind of historical track management method marked and drawed based on electronic chart provided by the invention, comprises the following steps:
The first step: draw polygon on map.
Second step: calculate this polygonal area, and automatically generate an ID, enclose corresponding attribute information and comprise time attribute, be stored in database.(table 1 is a kind of storage format of recommendation).
3rd step: certain polygon can be chosen to modify according to actual conditions, calculate amended area of a polygon, new time attribute is stored in database, the polygon of this amendment is up-to-date atural object polygon, the polygon before covering, map shown, but still retain historical record in a database.
4th step: the polygon marked and drawed and revised afterwards belongs to an ID, inquires all polygons belonging to same ID in database according to ID.
5th step: load a time shaft control on map, when mouse chooses a time, then filter from all history polygons inquired according to this time, select qualified polygon and show.Time shaft is the mobile Dynamic Announce then forming polygon historical track fast.
Embodiment
According to Hongchehu Lake example, the present invention is described below, object of the present invention and effect will become more obviously (for Hongchehu Lake).
The first step: image data, photomap is drawn out the outline polygon in Hongchehu Lake.
Second step: the area calculating this polygon (i.e. Hongchehu Lake), and automatically generate an ID, enclose corresponding attribute information and comprise time attribute, be stored in PostgreSQL database.
3rd step: the profile in Hongchehu Lake is being modified according to actual conditions every a period of time, calculate the area in amended Hongchehu Lake, and new time attribute is stored in database, and the region, Hongchehu Lake before the Hongchehu Lake area polygonal newly revised is covered, map shown.
Table 2 map plotting Hongchehu Lake area polygonal
| ID | date | geom | area |
| hz | 1980 | Polygon1 | 1762 |
| hz | 1985 | Polygon2 | 1597 |
| ... | ... | ... | ... |
| dt | 1980 | Polygonn | ... |
(note: representated by geom field is a geometry object, and replace with polygon because length is long, the unit of area is km herein
2)
4th step: the polygon marked and drawed and revise belongs to an ID, and this ID shows that these polygons are both an atural object.Then the spatial data record corresponding to Hongchehu Lake all in database is inquired according to ID.
5th step: load a time shaft control on map, when mouse chooses a time, then filter from all Hongchehu Lake spatial data inquired according to this time, selection meets the polygon of time conditions and is shown on map.Time shaft is the mobile dynamic evolution process then forming Hongchehu Lake historical track fast, it can be seen that the area in Hongchehu Lake is in reduction, now people can according to the reason of this dynamic evolution process analysis procedure analysis Hongchehu Lake area reduction, and make corresponding decision-making, to slow down the reduction speed in Hongchehu Lake, can also make prediction to Hongchehu Lake region area in the future.
Claims (1)
1., based on the track management method that electronic chart is marked and drawed, step is as follows:
The first step: draw polygon on map;
Second step: calculate this polygonal area, and automatically generate an ID, enclose corresponding attribute information and comprise time attribute, be stored in database;
3rd step: certain polygon can be chosen to modify according to actual conditions, calculate amended area of a polygon, new time attribute is stored in database, the polygon of this amendment is up-to-date atural object polygon, the polygon before covering, map shown, but still retain historical record in a database;
4th step: the polygon marked and drawed and revised afterwards belongs to an ID, inquires all polygons belonging to same ID in database according to ID;
5th step: load a time shaft control on map, when mouse chooses a time, then filter from all history polygons inquired according to this time, select qualified polygon and show, time shaft is the mobile Dynamic Announce then forming polygon historical track fast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125678.7A CN104765783A (en) | 2015-03-23 | 2015-03-23 | Trajectory management method based on electronic map plotting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125678.7A CN104765783A (en) | 2015-03-23 | 2015-03-23 | Trajectory management method based on electronic map plotting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104765783A true CN104765783A (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510125678.7A Pending CN104765783A (en) | 2015-03-23 | 2015-03-23 | Trajectory management method based on electronic map plotting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176845A (en) * | 2021-04-23 | 2021-07-27 | 北京完美知识科技有限公司 | Method and device for displaying historical information in historical map |
| CN114490601A (en) * | 2021-12-31 | 2022-05-13 | 北京中交兴路信息科技有限公司 | Vehicle track testing method and system |
-
2015
- 2015-03-23 CN CN201510125678.7A patent/CN104765783A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176845A (en) * | 2021-04-23 | 2021-07-27 | 北京完美知识科技有限公司 | Method and device for displaying historical information in historical map |
| CN113176845B (en) * | 2021-04-23 | 2024-01-12 | 北京完美知识科技有限公司 | Method and device for displaying history information in history map |
| CN114490601A (en) * | 2021-12-31 | 2022-05-13 | 北京中交兴路信息科技有限公司 | Vehicle track testing method and system |
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Application publication date: 20150708 |