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779ac74fc7
This is the only way I can think to stop this shape self-intersecting without drastically changing its area (i.e. filling the hole in the donut). This is the only area in our library which is a genuine donut and presents this problem
Adding or updating source files
If the files are in GeoJSON format you can drop them straight in.
If you have a Shapefile, for example from the ONS Open Geography Portal, you need to convert it:
- download the .zip from the portal
- extract it, giving you a folder with a few files in
- go to https://mapshaper.org
- drag all the files in the folder into mapshaper
- click ‘import’
- you should see a rendering of the shapes
- click ‘console’ (top right)
- run this command:
mapshaper -proj wgs84 - click ‘export’ (top right)
- choose ‘GeoJSON’
- click the button
- done