TransDEM anomaly: map cut-off

[martinvk]

After many successful maps created using TransDEM, I ran into a strange anomaly today.
I got the DEM data from SRTM, the upper right part is N07W009
After going through the MapTile Servers and JOSM to create the GPX files for various splines, it was time to create the map.
In TransDEM I have this

But when I load it into Tranz22PE I only get part of it, this

Note the sharp cut-off at the upper right and lower left.
What could cause this and how do resolve this to get the whole map The top cut-off is not that critical since the map is supposed to stop there but the bottom left should continue to the left.

 

[OddRails]

I've not seen Transdem truncate anything unless what I'm doing is too much data for the system to handle. I don't know what is causing it in your case.

 

[HiBaller]

I ran across something similar to that. Turned out I hadn't extended the LEFT side of the margin square far enough, and the program truncated the build.

Bill

 

[martinvk]

I ran across something similar to that. Turned out I hadn't extended the LEFT side of the margin square far enough, and the program truncated the build.

Bill

Hmmm, that could explain the upper right but not the left side which is missing the short leg. I've created wider maps so not an TransDEM limit issue. I've heard of a UTM boundary issue. It is almost centred in UTM zone 29.

 

[martinvk]

Was able to create another new map without any anomalous cut-off in a different area so I conclude that the data was somehow causing this issue. The next time I need a map in the same general area I'll see if the issue re-appears.