NAME

       sortshp - sort a Shape data set

SYNOPSIS

       sortshp [ infile outfile item [ascending | descending] | -v]

DESCRIPTION

       sortshp  sorts a Shape data set based on a single column in ascending or descending order. Supports INTE‐
       GER, 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  val‐
       ue, it will be faster for MapServer to access that value if it is at the beginning of the attribute file.

OPTIONS

       infile The name of the .shp file

       outfile
              The name of the .shp/.shx and .dbf files to create

       item   Name of the field to sort on

       ascending, descending
              Sort order (default: ascending)

       -v     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

       Result:
              A new Shape data set named 'roads-sort.shp' is created with shapes sorted in ascending order,  ac‐
              cording to the values in the 'class1' field.

       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

       map2img(1), shptree(1), shptreetst(1), shptreevis(1)

                                                  31 March 2024                                       sortshp(1)