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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

Models

For the Arena application, a script called models.py contains the models that will be used for the application. As described earlier, these models are Python classes that contain database column definitions and can have internal functions for processing data. Our simplified models contain only data column definitions using SQLAlchemy and GeoAlchemy2 classes.

To connect to the database, the app object is imported. This makes the application configuration variables, including app.config['SQLALCHEMY_DATABASE_URI'] which stores the database connection string, available to the SQLAlchemy create_engine function:

from application import app# The database connections and session management are managed with SQLAlchemy functionsfrom sqlalchemy ...
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Publisher Resources

ISBN: 9781788293334Supplemental Content