A question of how to georeference a raster image was recently raised in our Geonet forum. There's an FAQ on How To: Warp or Georeference a Grid or a Database that provides some basic information on georeferencing.
This question also reminded me of a related topic: Using numeric channel formats in Geosoft databases (*.GDB) to convert from geographic number formats (DD.MM.SS.ssss) to decimal degrees (DD.dddd) or vice versa.
Here's how you can simply convert coordinates between these two common formats:
1. Create a new channel and set the display format to Geographic.
2. Enter the Long and Lat coordinates of your point(s).
2. Right click on the channel header and select Edit...
3. Change the format to Normal and set Decimals to 6, then click OK. Do the same for the other coordinate channel. The coordinates are now in decimal degrees.

I would like to suggest a video tutorial on warping a grid - I found the FAQ (How To: Warp or Georeference a Grid or a Database) difficult to follow and have not been able to emulate it.
Thanks
Posted by: Ian | 06 October 2010 at 09:32 PM