AC3D Forums - View Single Post

Bob Pieterson · 11th December 2004, 09:23 AM

I tried the height field importer with a bmp image that I made from a SRTM GeoTiff.

The imput comes from:
http://glcf.umiacs.umd.edu/data/srtm/
SRTM 3 arc seconds tiles - 3 arcseconds means points 90 meters apart on equator ?
The tiles are 1200 by 1200 big. Looked at a tile of Holland (52 north 4 east) with 3Dem. A lot of (missing) data to be patched and much distortion over the North Sea (-2 mtr to 2 mtr) and cities(buildings).
Exported from 3Dem to .TXT format to read the values: decimeters elevation.

AC3D (.PF import) and 3DS max v 6 (USGS .DEM import) both stop showing any sign of life. 100 % CPU load for a long time.

Cut the GeoTiff up with Photoshop CS trial version into 36 pieces of 200 by 200. Saved them for web and converted only one sample out of the 36 pieces to BMP.

Imported with height field .BMP import into AC3D. Result 200 by 200 points on a size of 8 by 8 with elevation of 1. Hmm something has gone wrong.

11th December 2004, 09:23 AM	#2
Bob Pieterson Junior Member Junior member Join Date: Jun 2003 Posts: 7	I tried the height field importer with a bmp image that I made from a SRTM GeoTiff. The imput comes from: http://glcf.umiacs.umd.edu/data/srtm/ SRTM 3 arc seconds tiles - 3 arcseconds means points 90 meters apart on equator ? The tiles are 1200 by 1200 big. Looked at a tile of Holland (52 north 4 east) with 3Dem. A lot of (missing) data to be patched and much distortion over the North Sea (-2 mtr to 2 mtr) and cities(buildings). Exported from 3Dem to .TXT format to read the values: decimeters elevation. AC3D (.PF import) and 3DS max v 6 (USGS .DEM import) both stop showing any sign of life. 100 % CPU load for a long time. Cut the GeoTiff up with Photoshop CS trial version into 36 pieces of 200 by 200. Saved them for web and converted only one sample out of the 36 pieces to BMP. Imported with height field .BMP import into AC3D. Result 200 by 200 points on a size of 8 by 8 with elevation of 1. Hmm something has gone wrong.