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TERRAIN - Working with Huge Point Datasets

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)