{ "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs", "Stylesheet": [ "simplevariabletest.mss" ], "Layer": [{ "id": "world", "name": "world", "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs", "Datasource": { "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip", "type": "shape" } }] }