To get familiar with GeoJSON / Openlayers , I tried to use this example
http://gis-lab.info/share/DR/sandbox/geojson.html (found it here on stackoverflow)
first step was to copy the html locally a and change the url to the geojson file from
"./data/l1.geojson"
to
"http://gis-lab.info/share/DR/sandbox/data/l1.geojson"
no other changes made, but it didn't work ..
2nd try was to just put the geojson file locally.
didn't work either
What am I missing ?