Surface layers:

• Raster datasets - currently single band rasters are supported only
  • ESRI binary grid
  • Erdas Imagine image (.img)
  • TIFF format (.tif)
  • ESRI Ascii Grid
• TIN datasets - PolygonZ TIN created with ET Surface or ET GeoWizards and stored in a shapefile. Note that if you have a data in ESRI TIN format, you can easily convert it in PolygonZ TIN using the functions of ET Surface

Feature layers - currently shapefiles are supported only:

• Point, PointZ
• Polyline, PolylineZ
• Polygon, PolygonZ
• Multi-Patch

Image Layers - three band rasters are supported:

• Erdas Imagine image (.img)
• TIFF format (.tif)
• JPEG

Note that the data to be used needs to be in a projected coordinate system. All the layers loaded in a single project need to have the same coordinate system.

For reading raster datasets ET TerrainViewer utilizes Geospatial Data Abstract Library (GDAL) by Frank Warmerdam. - http://www.gdal.org/. GDAL is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation.