draw shp

draw shp shapefile <n> <m>

Draws the contents of a shapefile. The arguments are:

shapefile  The name of the shapefile. It is not necessary to include the file extension (.shp)
n          Element number (if you want to draw only one)
m          Use n  and m if you want to draw a range of elements

If n  and m are omitted, all the elements in the shapefile will be drawn.

Usage Notes

This command is available with GrADS version 2.0.a8 or later.

If you put the three shapefile components (*.shp, *.shx, and *.dbf) in the GrADS data directory (pointed to by the GADDIR environment variable), then it is not necessary to include the full path in shapefile.

Before invoking this command, it is necessary to draw a plot first in order to establish the dimensions and scaling of the display. Shapefiles contain 2-dimensional spatial features, so your plot must be varying in the X-Y (lon/lat) domain. A shapefile may contain one of three kinds of graphical elements: points, lines, or polygons.

• For shapefiles that contain points, GrADS will draw a mark at each point location. The mark type and size are controlled by the set shpopts command, and the color is controlled by the set line command.
• For shapefiles that contain lines, GrADS will draw the line elements using the color, style, and thickness settings that are controlled by the set line command.
• For shapefiles that contain polygons, the default behavior of GrADS is draw only the perimeter of each polygon element. Use the set shpopts command to draw filled polygons and set the fill color. The color, style, and thickness of the polygon perimeters are controlled by the set line command.

Please see the documentation page on shapefiles for more details.

Examples