d.vect.thematic - Creates thematic maps from vectors of all types and numeric attributes (stored in the data table connected to a vector map). Thematic maps can be displayed by either a graduated color scheme (for all vector types), or as graduated icon sizes (for point and centroid types). The user selects the vector file to be mapped and attribute column from which to derive mapping intervals, and (optionally) the layer for attribute data.
In thematic maps, the color or point size changes for each range of attribute values. Value ranges for thematic mapping can be set at regular intervals, standard deviation units on either side of the mean, quartiles, or delimited by user-defined breakpoints. User-defined breakpoints also can be piped into d.vect.thematic from standard input or other external source.
There are options to define the color scheme (graduated colors) and range of point sizes (graduated points) for thematic maps. A simple text legend is printed. Optionally, a graphic legend can be drawn in the selected display monitor. Thematic colors can be uploaded to a GRASSRGB column for later display, and thematic map display commands can be saved to a group file (*.dm) that can be opened, edited, and displayed in the GIS Manager.
(GRASS Shell Script)
AUTHORS d.vect.thematic: Michael Barton, Arizona State University, Daniel Cavelo Aros, Martin Landa, and Jachym Cepicky.
Last changed: $Date$