Maps supports working with GeoJSON since version 6.
Since GeoJSON is an open standard, many tools allow you to create and consume GeoJson. A simple online visual map editor that outputs GeoJSON is geojson.io.
In-wiki GeoJSON
Since version 6.0, you can store your GeoJSON in wiki pages in the GeoJson namespace. For instance GeoJson:Berlin. You can use this GeoJSON via the geojson parameter by giving it the page name. The GeoJSON stored in a page can be used by as many maps as you like.
{{#display_map: center=Berlin | geojson=Berlin}}
Make sure the pages in the GeoJson namespace contain valid JSON. Once saved, the pages show a preview of the GeoJSON on a Leaflet map.
Visual editor
Since version 6.7, the pages in the GeoJson namespace contain a visual map editor. The editor is only shown to those with permission to edit the page.
Since version 7.13 the editor is also shown on regular maps that use GeoJson.
Semantic MediaWiki integration
Since Maps version 7.16, experimental SMW integration stores GeoJson data as SubObjects. Contact Jeroen De Dauw for more information.
GeoJSON export
You can export GeoJSON stored on a GeoJSON page by clicking "edit" or "view source" and copying the content.
Alternatively, add ?action=raw to the page URL. Example: GeoJson:Berlin?action=raw
Limitations
As of version 7.16:
- Only Leaflet supports GeoJson
- Marker styles cannot be changed
- Images and links cannot be added to the markers
- No visual editing of shape styles
- Editing the GeoJSON page directly does not cause automatic updates on pages that make use of it
- No captcha integration: edits will fail for users who need to fill out a captcha to edit
- The preview maps on GeoJson pages cannot be customized via wikitext or configuration
- https://github.com/JeroenDeDauw/Maps/projects/1
You can hire Jeroen De Dauw (creator of Maps) to work on the above via Professional Wiki.
GeoJSON files
{{#display_map: center=Berlin
| geojson = https://raw.githubusercontent.com/leakyMirror/map-of-europe/master/GeoJSON/europe.geojson
}}
