OpenLayers GeoJson reprojection

1
votes

I hot stack with reprojection of GeoJson
I have GeoJson object loaded by ajax from server
Object has CRS set to EPSG:2180
I want to overlay it on OpenStreet Map that has CRS EPSG:3857

var buildingsFeatures = (new ol.format.GeoJSON()).readFeatures($buildings, {
        dataProjection: 'EPSG:2180',
        featureProjection: 'EPSG:3857'
    });

$building is GeoJson FeatureCollection object and above code is as per OpenLayers documentation but coordinates are not changed.

I hit a wall with it :(

1
openlayers-3geojsonprojection

1 Answers

0
votes

Things to do to make it working:

proj4.defs([ [ 'EPSG:2180', '+proj=tmerc +lat_0=0 +lon_0=19 +k=0.9993 +x_0=500000 +y_0=-5300000 +ellps=GRS80 +units=m +no_defs' ] ]);

and that's all.