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
       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.

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,
              according 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

       shp2img(1), shptree(1), shptreetst(1), shptreevis(1)

                                                28 February 2020                                      sortshp(1)