sortshp1
Sort a shape data set
Usage
FCsortshpF [0]
[{infile
outfile
item
[{ascending | descending}] | FC-vF
[0]}]
Overview
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) |
FC
|
Display mapserver version and build options. |
Examples
This example uses a roads file ('roads_ugl') that has a field with road classes in integer format ('class1').
FC
sortshp roads_ugl roads-sort class1 ascending
F[0]
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⟩
Releases
6 releases since Debian 8 (Jessie); the text changed 5 times.