datasette-leaflet-geojson/README.md
# datasette-leaflet-geojson
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Datasette plugin that replaces any GeoJSON column values with a Leaflet map
## Installation
Install this plugin in the same environment as Datasette.
$ datasette install datasette-leaflet-geojson
## Usage
Any columns containing valid GeoJSON strings will have their contents replaced with a Leaflet map when they are displayed in the Datasette interface.
## Demo
You can try this plugin out at https://calands.datasettes.com/calands/superunits_with_maps
![datasette-leaflet-geojson in action](https://raw.github.com/simonw/datasette-leaflet-geojson/main/datasette-leaflet-geojson.png)
## Configuration
By default this plugin displays maps for the first ten rows, and shows a "Click to load map" prompt for rows past the first ten.
You can change this limit using the `default_maps_to_load` plugin configuration setting. Add this to your `metadata.json`:
```json
{
"plugins": {
"datasette-leaflet-geojson": {
"default_maps_to_load": 20
}
}
}
```
Then run Datasette with `datasette mydb.db -m metadata.json`.