Creates a .png image from a shapefile.
By default it will draw all polygons in the shapefile.
You can specify which polygon you want to draw by providing
an attribute filter.
Attribute filters can be chained.
The syntax for an attribute filter is as followed:
python shp2png.py <SHAPEFILE NAME> -f <ATTRIBUTE NAME> "<ATTRIBUTE VALUE>" -f <SECOND ATTRIBUTE NAME> "<SECOND ATTRIBUTE VALUE>" -o <OUTPUT NAME>
You can batch-generate multiple images by specifying a group by constraint.
Group by constraints look like attribute filters,
but are surrounded by [square brackets] and do not have attribute values.
The syntax for a "group by" constraint is as followed:
python shp2png.py <SHAPEFILE NAME> -f [<ATTRIBUTE NAME>] -o <OUTPUT PREFIX>
The polygon fill and stroke colors are white by default.
You can override the colors with the --fill and --stroke options respectively.
To generate an additional image with a transparent polygon and opaque stroke specify the --outline option.
--outline takes an optional color parameter (defaults to black):
--outline rgb(255,0,0)
or
--outline red
The default image width is 4333 (pixels).
You can override this with the --width option.
Example output (without attribute filters):
This script requires the Python Imaging Library.
To to install it run pip install PIL or easy_install PIL
author: Mike Furlender date: 20140910
mfurlend AT gmail DOT com