3

I'm trying to georeference some maps of Namibia and am having trouble. The projection stated on the map is the "Gauss Conform Central Meridian 15deg E. Bessel's Spheroid". I've tried using South African CRS : HBK_NO_15 and CAPE_NO_15 on the assumption that perhaps the "NO_15" refers to the central meridian. However, when I rasterize the files, they are upside down.

Does anyone know why this would be?

Please see related question, here.

  • @AndreJ you indicated here that I should only enter my Southern degrees in the negative, however, this document indicates that both X and Y axes (East and North) should be entered in the negative. Perhaps you could clarify? – Cole Robertson Aug 21 '17 at 18:55
  • The document refers to the projected coordinates in meters, not the degree coordinates. – AndreJ Aug 22 '17 at 5:35
3

GIS software always uses positive coordinates to the right and up.

The Sounth African and Namibian Lo CRS avoid negative coordinates, using positive coordinates suthwards. That's the reason you see your map upside down.

If you use a north-up project CRS like UTM 33S or Web Mercator, your map is displayed north-up again. The layer CRS can be different.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.