DEM data flavors

[aksnowbiker]

I'm above 60 degrees latitude, so I have to use local DEM files.  I've been using the same DEM files for a few years now, and I thought I'd see what else is out there.  USGS offers digital elevation models at 1/3 arc second resolution, but in some formats (IMG, ArcGrid, GridFloat) that I wasn't able to make work.

Does TF require that the DEM file has the .dem extension, or are other data types accepted? 

Thanks
Tom

[ScottMorris]

Hey Tom,

A few versions back TF got a new elevation server that supports 60*+.  However, your current maps.dat cache has unfortunately cached the missing data.  So the only way to get that data is to start a new map cache (in a new directory).  That's one thought.

I believe only .dem files are supported natively.  That code is still there and works, but hasn't been looked at for quite some years.

Thanks.

[aksnowbiker]

Thanks Scott -- I had installed the new TF v4.81, but didn't get rid of the map cache and DEM cache.  Once I did that, problem solved.  That's pretty cool that you got DEM support for us northerners.  Nice!  Now I don't have to worry about the extent of my local DEM files.

Is the DEM data resolution fixed, or variable by area?  It's chunky up near Fairbanks.

Tom