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I have downloaded a GML file from Statistics Canada and would like to convert it into GeoJSON to use parts of it in a D3 visualization on the web. However, I did not find a converter that would do that for me (I tried http://converter.mygeodata.eu/ , but the GeoJSON it returned did not contain any actual geometry).
What is the best approach to convert GML into GeoJSON?
You Can use ogr2ogr. Simplest to install it would be to download fwTools.
the following command will do
ogr2ogr -f "GeoJSON" E:\lakes.geojson e:\lakes.gml
Else if you have QuantumGIS, you can add your GML layer to map and by Right-Clicking the Layer, Select Save As to GeoJSON format.
As vinayan said, ogr2ogr would be a good solution, but a handy way I've used in the past to quickly convert vector formats it to use this existing OpenLayers example:
http://openlayers.org/dev/examples/vector-formats.html
Just draw your features or paste the data and hit add feature.
If you have R Studio (it's a free software), you can use the converter located here to easily convert large GML files to GeoJSON:
