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SW for creation of arrows and ellipses shapefiles for GIS
SW for creation of arrows and ellipses shapefiles for visualization of vectors error ellipses etc. Input is structured text file. Output is shapefile (open specification from ESRI). Shapefile is widely used in GIS SW.
Simulates data from a gaussian/beta/piecewise-linear species response function on an environmental gradient, with different sampling (error) distributions. See "Cline (biology)" on wikipedia.org.