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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

POST requests

If a user selects an arena from the list and pushes the Find Data button, the HTML form issues a POST request to the view. With the if conditional resolving to True, the view handles the request by generating an arena location coordinate pair and a custom popup, instead of using a default coordinate pair and popup value:

  if request.method == "POST":       arena_id = form.selections.data       arena = session.query(Arena).get(arena_id)       form.longitude = round(arena.longitude,4)       form.latitude = round(arena.latitude,4)

The property form.selections.data is used to retrieve the id of the arena chosen from the list and is passed to a variable called arena_id. This id is then used to query the database through the SQLAlchemy ORM's get method. ...

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Publisher Resources

ISBN: 9781788293334Supplemental Content