MacDEM for Mac

From MacDEM:

MacDEM is an application to view and edit digital elevation model (DEM) files.

• Import elevation data in these formats:
  • USGS ASCII DEM
  • SDTS DEM
  • DTED (Level 0, 1, and 2)
  • GTOPO30
  • GLOBE
  • TerrainBase
  • PGM
  • Raw ASCII
  • Raw Binary files
• Merge DEM files together
• Resample and crop DEMs
• Display DEMs in shaded relief, with user-definable color maps
• Export shaded relief images to PICT, TARGA, and TIFF formats
• Export elevation data to binary, PGM (e.g. for Bryce), 16-bit Photoshop, and POV-Ray
• Write World Files (.tfw)
• Make contour maps

  What's new in this version: Improved relief shader. Eliminates some artifacts that sometimes appeared. Also allows user to select one of two shaders to allow precise control of alignment of relief shading.