NAME¶sortshp - sort a Shape data set
[ infile outfile item [ascending | descending] | -v]
DESCRIPTION¶sortshp sorts a Shape data set based on a single column in ascending or descending order. Supports INTEGER, DOUBLE and STRING column types. Useful for prioritizing shapes for rendering and/or labeling.
The idea here is that if you know that you need to display a certain attribute classed by a certain value, it will be faster for MapServer to access that value if it is at the beginning of the attribute file.
- The name of the .shp file
- The name of the .shp/.shx and .dbf files to create
- Name of the field to sort on
- ascending, descending
- Sort order (default: ascending)
- Display mapserver version and build options.
EXAMPLE¶This example uses a roads file ('roads_ugl') that has a field with road classes in integer format ('class1').
sortshp roads_ugl roads-sort class1 ascending
Figure 1: Attributes Before sortshp ⟨http://mapserver.org/_images/sortshp-before.png⟩
Figure 2: Attributes After sortshp ⟨http://mapserver.org/_images/sortshp-after.png⟩
SEE ALSO¶shp2img(1), shptree(1), shptreetst(1), shptreevis(1)
|01 May 2021|