Conversion result implemented in Google Maps, using data of my hometown Deinze, Belgium
GDAL 1.9 Complete but perhaps the framework itself might also do.
After installation, you can use
ogr2ogr to do the actual conversion.
Convert ESRI Shapefile to geoJSON:
/Library/Frameworks/GDAL.framework/Programs/ogr2ogr -f "GeoJSON" output.json input.shp
Convert ESRI Shapefile to geoJSON with Coordinates Conversion (here LAMBERT 1972 (EPSG:31370) to WGS84):
/Library/Frameworks/GDAL.framework/Programs/ogr2ogr -f "GeoJSON" -s_srs "EPSG:31370" -t_srs "WGS84" output.json input.shp
The latter is the command you’ll be looking for when working with gisoost.be buurtwegen data.