DEM data works at 1 arc/sec, but not 1/3

[BoostedFridge]

Hello all,

I've been struggling for the past few hours trying to import DEM data into TS2014 for the first time.

I read BNSFsudivision's excellent tutorial, and followed it to the letter, but try as I might I couldn't get any DEM data to import into the world editor. I kept getting flat ground. I was using the USGS gridfloat data, and running it through MIcrodem to make .bil files, and creating my .hgt files with BILxSRTM. The data from USGS showed 1/3 arc sec gridfloat was available for the co-ordinates around my smallish test area, so I set BILxSRTM to make the .hgt files for 1/3 arc sec. After hours of frustration reading every thread on here about DEM importation I set BILxSRTM to export to 1 arc sec, and suddenly the DEM data imports to the world editor like it was supposed to.

When I was trying to get 1/3 arc sec .hgt files, BILxSRTM output 90 2.8MB .hgt files for the area. At 1 arc sec I ended up with a single 25MB file. Can TS2014 only handle a single SRTM file? Do I have to merge the 90 individual files into 1 somehow? Is there a chance that the data from USGS is NOT actually 1/3 arc sec for the area, like it claims to be? Any ideas? My test area is the valley around Hornbrook, CA.

I'm working on a very mountainous route, and at 1 arc second the ledges that the line clings to are barely discernable in the terrain, so I would love to find a way to get the accuracy up.

[GreatNortherner]

Hi,

My guess is -- the in-game importer can't handle the tiles.

As far as I know, it looks for a specific file name: for example, N40W073.hgt for SRTM, and ASTGTM_N40W073_dem.tif for ASTER. It may be possible to import 1/3 arc sec data, but probably only if it duplicates the standard SRTM tile grid (one file for each degree long/lat).

The game itself can handle the 1/3 arc sec resolution, even 1/9 arc sec where available, but to my knowledge the old ReDem tool (see http://www.zugware.com/ ) may be the only way to import it.

Cheers,
Michael

[Bananarama]

http://www.3dtrains.com/forums/index.ph ... ap-viewer/

[BoostedFridge]

Thanks guys! DL'ing Redem. Does it matter if your .BIL file comes from an IMG or a gridfloat for this purpose?

[Bananarama]

Thanks guys! DL'ing Redem. Does it matter if your .BIL file comes from an IMG or a gridfloat for this purpose?

No, so long as the other files specified in the post I linked to above are present.