It's now possible to use GeoJSON to generate the shapes of states and locations (v4.4+). This makes it possible to create overlays that can be positioned using the level property.
| State/Location GeoJSON properties | |
|---|---|
| geojson_url | The url of the GeoJSON file. (e.g. https://hosting.simplemaps.com/examples/states.json). |
| geojson_field | The fieldname used for selecting features (e.g. STUSPS). |
| geojson_value | The value of geojon_field for the targeted feature (e.g. NY). |
Defaults can be set for the above in the main_settings (e.g. main_settings.state_geojson_url).
Here is a simple example that will create a state with the shape of Ohio and lay it over the US map:
state_specific: {
OH_overlay: {
name: "Ohio Overlay",
geojson_url: "https://hosting.simplemaps.com/examples/states.json",
geojson_field: "STUSPS",
geojson_value: 'OH',
color: 'red',
hover_color: 'darkred',
opacity: .3, //allows us to see through the state
level: 4 //place this state above exising states (level 3)
},
}
You can copy the above and paste it into the "Code" section of your map to test it out.
| Advanced State/Location GeoJSON properties | |
|---|---|
| type | Optional. Giving a state a type of 'geojson' will make it use its id as the geojson_value. Giving a location a type of 'geojson' will import the geojson features in order (if geojson_value is not set). |
| feature | Optional. Allows you to reference the GeoJSON object's feature explicitly (e.g. geojson['features'][0]). Most useful for dynamic applications. |
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