Graphics Reference
In-Depth Information
Creating the application
Our application is going to be a standalone Python program built using PyQt and the
PyQGIS library. Taking the Lex application we implemented in
Chapter 5
,
Using QGIS in
an External Application
, as a starting point, let's see how we can organize the source files
for the ForestTrails system. We'll start with the following basic structure:
This is very similar to the structure we used for the Lex application, so most of this should
be familiar to you. The main difference is that we're using two subdirectories to hold addi-
tional files. Let's take a look at what each of these files and directories will be used for:
•
constants.py
: This module will hold various constants used throughout the
ForestTrails system.
•
data
: This is a directory that we will use to hold our raster basemap as well as the
SpatiaLite database that holds our tracks.
•
forestTrails.py
: This is the main program for our application.
