[Gdal-dev] Merging DEMs seamlessly

[Chris Pennock]

All - 

Merging DEMs is a frequent topic, but the suggestion I
often see is like:

gdal_merge.py -o merged.tif dem1.dem dem2.dem

I when this is done, even if the two DEMs being merged
have the *same* corner points, I usually get a few
points of empty space between the dems in the merged
tif. 

Does anyone have any thoughts on why this would
happen, or a possbile fix? Perhaps the culprit is that
neither of of two dems has the set of height points
closest to the line forming their interface. I
thought, however, that for every column of height
points, that one dem or the other would have each
point on the column. 

Many thanks in advance for this very newbie question!

Chris

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com