datasette-geojson-map 0.2.1

Render a map for any query with a geometry column

datasette-geojson-map

Render a map for any query with a geometry column

Installation

Install this plugin in the same environment as Datasette.

$ datasette install datasette-geojson-map

Usage

Start by loading a GIS file.

For example, you might use geojson-to-sqlite or shapefile-to-sqlite to load neighborhood boundaries into a SQLite database.

wget -O neighborhoods.geojson https://opendata.arcgis.com/datasets/3525b0ee6e6b427f9aab5d0a1d0a1a28_0.geojson
geojson-to-sqlite boston.db neighborhoods neighborhoods.geojson --spatial-index # create a spatial index

(The command above uses Spatialite, but that's not required.)

Start up datasette and navigate to the neighborhoods table.

datasette serve boston.db --load-extension spatialite

# in another terminal tab
open http://localhost:8001/boston/neighborhoods

You should see a map centered on Boston with each neighborhood outlined. Clicking a boundary will bring up a popup with details on that feature.

This plugin relies on (and will install) datasette-geojson. Any query that includes a geometry column will produce a map of the results. This also includes single row views.

Development

To set up this plugin locally, first checkout the code. Then create a new virtual environment:

cd datasette-geojson-map
python3 -mvenv venv
source venv/bin/activate

Or if you are using pipenv:

pipenv shell

Now install the dependencies and test dependencies:

pip install -e '.[test]'

To run the tests:

pytest