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Mastering Geospatial Analysis with Python
book

Mastering Geospatial Analysis with Python

by Silas Toms, Paul Crickard, Eric van Rees
April 2018
Beginner to intermediate content levelBeginner to intermediate
440 pages
11h 36m
English
Packt Publishing
Content preview from Mastering Geospatial Analysis with Python

A geospatial query

By adding one more URL component, the API is spatially enabled. Passing an arena ID and adding "/intersect" will use spatial queries to find data describing the requested NBA Arena. In this view function, the County and District tables are queried using an intersect filter (that is, the county containing the arena is identified using a point in polygon function). The underlying state is retrieved using a table relation between the county and the state. All of the geometry and the selected fields are returned:

@app.route('/nba/api/v0.1/arena/<int:arena_id>/intersect', methods=['GET'])def arena_intersect(arena_id):  arena = session.query(Arena).get(arena_id)  county = session.query(County).filter(County.geom.ST_Intersects
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Publisher Resources

ISBN: 9781788293334Supplemental Content