How to use pgRouting in GIS Development

This article mainly introduces how to use pgRouting in GIS development, which is very detailed and has certain reference value. Friends who are interested must finish it!

PgRouting is an open source shortest path algorithm calculation class library, which is developed based on postgresql and postgis. Through the way of database, the imported data can be analyzed by the shortest path, and the results can be returned by using SQL statements. On the basis of the database, it has quite fast calculation efficiency.

Official website:

Http://pgrouting.org/

Integrate a variety of shortest path algorithms:

Follow postgresql before use, install the corresponding versions of postgis and pgRouting, and then use it.

For the use of the shortest path, the most time-consuming thing in the early stage is to make the data well, import the spatial road network data into the postgresql database, and add the relevant attribute data in the road network, such as road direction, distance length, time, etc., according to the help document of pgRouting. In generating the corresponding topological relationship, there are corresponding sql statements in these operations. After the data is completed, The above algorithms can be used to analyze the shortest path.

Compared with the shortest path analysis in arcgis, we also use arcmap and other tools to establish the topological relationship of the road network, and then calculate the data of the shortest path according to the incoming starting point and end point.

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