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First validate the geojson at GeoJSONLint - that will tell you definitively whether your problem is the syntax or tilemill. When I put your json into the validator it responded:
Invalid GeoJSON
A Feature must have a "properties" property.
First validate the geojson at GeoJSONLint - that will tell you definitively whether your problem is the syntax or tilemill. When I put your json into the validator it responded:
Invalid GeoJSON
A Feature must have a "properties" property.
First validate the geojson at GeoJSONLint - that will tell you definitively whether your problem is the syntax or tilemill. When I put your json into the validator it responded:
First validate the geojson at GeoJSONLint - that will tell you definitively whether your problem is the syntax or tilemill. When I put your json into the validator it responded: