A method for quickly extracting the road network in the specified administrative area from osm data
An administrative area and data technology, applied in geographic information databases, structured data retrieval, still image data retrieval, etc., can solve problems that do not meet user needs, complex shapes, increased workload, etc.
Active Publication Date: 2021-04-16
SOUTHEAST UNIV
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Problems solved by technology
If the shape of a certain administrative area is very irregular, the urban traffic network constructed by the downloaded OSM data will contain many unnecessary nodes and road sections, which need to be manually deleted by the user, which increases the workload
In addition, the boundaries of administrative districts directly downloaded from the Openstreetmap website are very fine and complex in shape. If nodes are judged according to this boundary, it will take a lot of calculation time. At the same time, nodes and road sections on the boundary will also be eliminated, which does not meet user needs
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[0035] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0036] The invention provides a method for quickly extracting the road network in a designated administrative area in OSM data. The present invention is described with the road network near Xicheng District, Beijing as an embodiment, and the map of this area in Openstreetmap is as follows figure 1 As shown in , the black outline is the administrative district boundary of Xicheng District.
[0037] Step (1) Convert the latitude and longitude coordinates of the nodes in the OSM data and the boundary points of the administrative area into the coordinates of the UTM coordinate system. If there is no specific reference, the coordinates in the subsequent steps are considered to be in the UTM coordinate system; after the conversion, they are arranged in the original order The set of boundary points of the administrative area is S all ;
[0038] In t...
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The invention discloses a method for quickly extracting the road network in a specified administrative area in OSM data. The method expands and simplifies the boundary outline of the specified administrative area provided by OSM, and carries out the nodes and road sections outside the expanded and simplified area. Delete, and finally get the OSM road network data in the specified administrative area. The present invention can automatically delete nodes and road networks outside the administrative area specified by the user, reducing the workload of the user to establish a virtual road network using OSM data; in addition, the expanded and simplified administrative area boundary also shortens the calculation of the process of judging whether the node is in the administrative area At the same time, it also avoids the possibility of mistakenly deleting the road section that coincides with the boundary.
Description
technical field [0001] The invention relates to the technical field of computer abstract expression of road traffic networks, in particular to a method for quickly extracting road networks in designated administrative areas in OSM data. Background technique [0002] In addition to complex characteristics such as involving multiple disciplines, cross-fields, and huge scale, the transportation system also has the characteristics of extremely high or even impossible experimental trials. With the continuous development of computer and network technology, its application in transportation is becoming more and more extensive. The concept and method of intelligent transportation system are becoming more and more mature, and the transportation system is also developing towards informatization, networking, automation and intelligence. An important technology in the intelligent transportation system is the traffic simulation technology, that is, the technical method of using modern co...
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IPC IPC(8): G06F16/29G06F16/56G06F16/58
CPCG06F16/29G06F16/56G06F16/5866
Inventor 王炜丁浩洋吴丽霞汪宇轩
Owner SOUTHEAST UNIV