Raster GIS Operations

Menu available with a raster grid as the active map window.  Those options requiring multiple open grids will not appear until you have opened the grids.  A DEM is just a specialized grid.

• DEM/Grid Histogram--create simple histogram of  current grid.  Settings on options form, (Analysis tab for using sea level for statistics and clipping the tails) will be used for histogram. Other histogram options
• Fixed palette stats
• Geomorphometry by categories
• Filter DEM/grid: creates a new grid, leaving the original unchanged.
• Downsampling (creating a lower resolution grid)
• Create derivative grid--create new grids from current grid.
• Multiple grid arithmec (map algebra)
• Geomorphometry analysis  (requires geomorphometry menu option set)
• Heat Map
• External tools
• Multiple grid masking
• ID features
  • Create database
  • Load database
• Migration over time
• Feature geomorphometry
  • Compute
  • Create grid
• Two grid comparisons
  • Scatterplot of two grids
  • Co-occurrence matrix of two grids
  • Missing data locations in one grid: create a database where one grid has missing values, and the other a valid value.
• Moment report
• Grid correlations:  get correlation matrix for open DEMs/grids.
• Terrain categories--create terrain categories.
• Viewshed--find masked/visible terrain.
• Required antenna height
• Parallel profiles
• Aligned profiles
• Create Mask
• Mask Grid
• RGB three parameter map
• Accumulated cost surface
• Least cost paths
• Geomorph atlas
  • Grids
  • Database
• Create bitmap mask: pick area shape file, and then the location and file name for it to be saved.  You should probably use the GIF format for most efficient storage on disk.  This will create a bitmap with the current screen resolution and coverage area, with the shape file as a solid color.
• Load sidescan imagery
• Random sampling points: pick the number of points.  If there is a DEM on the map, the points will only occur at locations with valid points on the grid.  The points will be in the current map area.
• Experimental

Last revision 2/23/2023