Data Manipulation Window

  The data manipulation window is accessible only from the main program file menu option or the main program toolbar. It presupposes a degree of knowledge about the data and some options may not be completely error trapped.  Opening most data sets no longer disables this window, but you should be very careful not to change an open data set.

This is a modal window; you must close it to revert to the other program options.

It allows the following options:

• File (to close window)
• Import: convert data into formats the program can use.
• Export: move data to format for other programs.
• Subset: create a smaller data set covering a smaller region.
  • LAS file: recursively quarter the LAS file, until all parts are smaller than specified size.  Depending on the aspect of the data set, it will be in corner quarters, or 4 tiles in the NS or EW direction.
  • DEMs: this lets you pick the corner coordinates, and subset a number of DEMs.  You might use this for a series of lidar grids over timel
  • Mask DEMs:  Pick a DEM to use as the mask, and then a number of DEMS to mask.  All points in the DEM to mask, for which there is not a valid point in the DEM to use as the mask, will be removed.  The masked DEMs will be stored in a "masked" directory, with just the region with valid data.
• Thin: only option here is to thin an ASCII file.
• Resample:  Many of these require GDAL to be installed.
• Create/Index
• Edit
• Compress/Uncompress
• Download
  • Text file of URLs such as OpenTopography or USGS National Map
• Delete: remove project, DEM, movie, or KML files from you hard disk. This will remove all associated files.
• Help

Last revised 7/22/2018