1 Reply Latest reply: Sep 4, 2017 5:30 AM by Patric Nordström RSS

    Change coordinate system to EPSG:28992

    Frank Beunder

      Hi,

       

      With our customer, most data is in EPSG:28992. The user guide gives me the following information:

       

      If you have lots of coordinates in another coordinate system than WGS-84 it might be efficient to run GeoAnalytics in another coordinate system. You then need to provide a background map in that coordinate system, either a tile service or a simple vector file.

      Qlik GeoAnalytics - User Guide

       

      Can someone give me a more hands-on explanation on how 'run GeoAnalytics' in another coordinate system?

       

      Thanks,

      Frank

        • Re: Change coordinate system to EPSG:28992
          Patric Nordström

          Hi Frank,

          This probably calls for a longer post, but here's the short version.

          • QGA default base map is in web mercator EPSG 3857
          • Default feature layers should be in WGS84 EPSG 4326
          • QGA can handle background and feature layers in other projections using base map "Empty" meter or degrees
          • If a custom projection, then all layers should follow the same projection.
          • No reprojection takes place on the client.

           

          So for instance, using your CRS EPSG:28992, it's a meter based CRS:

          • Switch to base map Empty meters
          • Load a background WMS in CRS EPSG:28992
          • Load coordinates from an excel file with EPSG:28992
          • Connect to WFS, use EPSG:28992

           

          Fyi, when importing data through the connector in other projections, the connector automatically converts to WGS 84, EPSG:4326.

           

          Thanks,

          Patric