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.if \n(.g .ds T< \\FC
.if \n(.g .ds T> \\F[\n[.fam]]
.de URL
\\$2 \(la\\$1\(ra\\$3
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.TH sortshp 1 "05 February 2024" "" ""
.SH NAME
sortshp \- sort a Shape data set
.SH SYNOPSIS
'nh
.fi
.ad l
\*(T<\fBsortshp\fR\*(T> \kx
.if (\nx>(\n(.l/2)) .nr x (\n(.l/5)
'in \n(.iu+\nxu
[
\fIinfile\fR
\fIoutfile\fR 
\fIitem\fR 
[\fIascending\fR | \fIdescending\fR]
| \*(T<\fB\-v\fR\*(T>]
'in \n(.iu-\nxu
.ad b
'hy
.SH DESCRIPTION
\fBsortshp\fR 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.
.PP
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.
.SH OPTIONS
.TP 
\fIinfile\fR
The name of the .shp file
.TP 
\fIoutfile\fR
The name of the .shp/.shx and .dbf files to create
.TP 
\fIitem\fR
Name of the field to sort on
.TP 
\fIascending\fR, \fIdescending\fR
Sort order (default: ascending)
.TP 
\*(T<\fB\-v\fR\*(T>
Display mapserver version and build options.
.SH EXAMPLE
This example uses a roads file ('roads_ugl') that has a field with road
classes in integer format ('class1').
.PP
.nf
\*(T<
       sortshp roads_ugl roads\-sort class1 ascending
      \*(T>
.fi

Result:
.RS 
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.
.RE
.PP
\fBFigure 1: Attributes Before sortshp\fR
.URL http://mapserver.org/_images/sortshp-before.png ""
.PP
\fBFigure 2: Attributes After sortshp\fR
.URL http://mapserver.org/_images/sortshp-after.png ""
.SH "SEE ALSO"
\fBmap2img\fR(1),
\fBshptree\fR(1),
\fBshptreetst\fR(1),
\fBshptreevis\fR(1)