A command-line tool and Python module to assign a property from one set of GeoJSON features to another
geo_assigner operates on two set of GeoJSON features: the sources and the
targets. For each target, it copies a chosen property from all sources that
intersect the target to the target.
Say you have a file trees.geojson containing the trees in your city and a
file districts.geojson containing the city's districts. We'll assume that
every tree has a property TreeID with a unique ID and that each district has
a property DistrictName holding its name.
To add to each tree the name of the district it is located in:
geo_assigner districts.geojson trees.geojson DistrictName output.geojson
To add to each district a list of all IDs of its trees:
geo_assigner -s list trees.geojson districts.geojson TreeID output.geojson
pip install -e git+https://https://github.com/stadt-karlsruhe/geo_assigner.git#egg=geo_assigner
$ geo_assigner --help
usage: geo_assigner.py [-h] [--strategy {list,last}]
SOURCE TARGET PROPERTY OUTPUT
Assign a property from one set of GeoJSON features to another.
positional arguments:
SOURCE Source GeoJSON file
TARGET Target GeoJSON file
PROPERTY Property name
OUTPUT Output file
optional arguments:
-h, --help show this help message and exit
--strategy {list,last}, -s {list,last}
Conflict resolution strategy in case of multiple
matches. Can either be "last" (use the value of the
last match, default) or "list" (collect the values
from all matches).
Copyright (c) 2017, Stadt Karlsruhe (www.karlsruhe.de)
Distributed under the MIT license, see the file LICENSE for details.