Global Mapper v25.0

Problem with rectification

jonpatch
jonpatch Global Mapper User
edited December 2014 in Technical Support
It's been a few years since I've used GM, and lots has changed, including my memory retention. I am attempting to georeference an image from an online source, but the output looks identical to the input, squashed north to south. Here's my workflow:

  1. File->Download online imagery
  2. In dialog box, add new source, specify image source WMS address
  3. Under Imagery – select desired source and press Connect
  4. Back at main menu select Export->Export Raster/Image format
  5. Select GeoTIFF format, press OK
  6. In GeoTIFF Export options, use defaults except:
  • 24 bit RGB
  • Generate TFW
  • Generate PRJ
  • Select Export Bounds tab and specify lat/long
  • Press OK
  1. Back at main menu: File->Rectify
  2. Select > Export rectified images to new files, GeoTIFF 24 bit RGB
  3. In the image rectifier dialog, select Add control points at corner points, and delete upper right and lower left, leaving UL and LR
  4. Enter known coordinates for these points and update
  5. Press OK
  6. GeoTIff is exported, but no correction is applied when viewed in PS. Looks identical to original image