I use ESRI's ArcView GIS (Geographic Information System) with Spatial Analyst to
combine them.  It isn't an inexpensive solution, but there are two other
alternatives that I can think of.

1.  Employ the services of a GIS Analyst.
2.  Manually distort each TGA in Photoshop (or similar app) so that the sides
are parallel, then combine them in same app.

David Vincent-Jones wrote:

> I am using a series of USGS 7.5' DEM files as height_fields.
> I would like to join several of them either before or after converting to
> .TGA format.
> Since the files represent map sheets they are all slightly 'key-stone'
> shaped.
> Does anybody know of an easy way to create a seamless image from such files?

Post a reply to this message