The KLT TERRAIN program can process DTMs with hundreds of millions of data points. It is used for:
- Displaying correlated or LIDAR digital surface models (DSMs)
- Interpolating gridded DTMs and contours from huge point datasets
- Cutting and sorting DTM files into new sheets
- Extracting DSMs from aerial imagery by correlation
- Classifying DSMs
- Displaying point datasets in 3D perspective or profile views
- Generating LIDAR stereograms for stereo handling of point datasets
DTM Point Data
With TERRAIN you can open one or multiple files of random mass points, raw LIDAR data, and/or gridded DTMs. The files can be irregular spaced formats like:
- LAS (a public file format for the interchange of LIDAR data)
- KLT ATLAS (either native or by importing DXF, DGN, etc. files)
- ASCII (e.g. XYZ, RXYZI, XYZRI, CXYZI, TXYZXYZII, YXZ, etc.)
Or the data files can be regular spaced grid formats like:
- USGS DEM
- USGS SDTS DEM (*CATD.DDF)
- NIMA DTED (*.DT?)
- Japan GSI DEM (*.MEM)
- ArcInfo ASCII grid interchange (from ASCIIGRID) (*.ASC/*.PRJ)
- ArcInfo binary grid (HDR.ADF)
- ESRI .HDR labeled BIL (*.HDR/*.BIL) (can be 8/16/32-bit integer and 32-bit floating point)
- TIFF (can be 16-bit integer or 32-bit floating point, strip or tiled)