TerrainTool

[Olly Betts]

On Mon, Nov 27, 2017 at 09:14:05PM -0000, Graham Mullan wrote:
> Serious question. That which you describe has never worked for me with
> 3D files generated from Therion rather than from Survex. Has anyone
> else, do you know, had the same problem?

You'll need to specify the coordinate system to Therion with its "cs"
command, and to use Therion 5.4.0 or newer so that this information is
actually included in the .3d file:

| Therion 5.4.0 (2017-04-03):
[...]
|  * bugs and issues fixed:
[...]
|    - include coordinate system and date-surveyed in the .3d export [PR#9,19]

You can check if a given .3d file specifies a coordinate system by
using "dump3d" (which has to be run from the command line) - there will
be a "CS" line in the header section (the part before the "--") if one
is specified:

$ dump3d all.3d
TITLE "Caves of the Loser Plateau"
DATE "@1484362246"
DATE_NUMERIC 1484362246
CS +proj=utm +ellps=WGS84 +datum=WGS84 +units=m +zone=33 +no_defs
VERSION 8
SEPARATOR '.'
--
[...]

If that's really not working for you, a complete example would be useful
for investigating why not.

Cheers,
    Olly