[Qgis-developer] Vector equivalent of a VRT - Linux bash script

[Zoltan Szecsei]

On 2014/10/24 18:49, Andre Joost wrote:
>
> +100 from me if you promise to build a QGIS plugin for the purpose ;-)
>

Right.... with a little help on the VRT syntax, from Even, this script 
will create you a vrt file (ie: in a simple case, 'ogrbuildvrt' :-)  )

#!/bin/bash
#
# Bash script to generate a VRT for SHP files
#
# Author: Zoltan Szecsei  zoltans at geograph.co.za
# Date:   26 October 2014
#
# Notes:
#       'find' is used instead of 'ls -1' as find descends nicely into 
subdirectories
#       WLC is the wildcard for 'find' to find the shapefiles you want
#       DIR is the parent directory, above the shapefiles you want to 
add into this VRT
#       NAM is the name you want to see in your QGIS 'Legend' sidebar
#       VRT is the me of the vrt file that will (must) be
#
#
WLC="*build*point*.shp"
DIR="."
NAM="MyVRT"
VRT="${DIR}/${NAM}.vrt"
echo "<OGRVRTDataSource>" > $VRT
echo "  <OGRVRTUnionLayer name=\"${NAM}\">" >> $VRT
for shp in `find $DIR -iname $WLC`
do
   lay="`ogrinfo  -al -so $shp | grep -i "layer name:" | awk '{print $3}'`"
   echo   "  <OGRVRTLayer name=\"$lay\">" >> $VRT
   echo   "    <SrcDataSource relativeToVRT=\"1\">${shp}</SrcDataSource> 
" >> $VRT
   echo   "  </OGRVRTLayer>" >> $VRT
done
echo "  </OGRVRTUnionLayer>" >> $VRT
echo "</OGRVRTDataSource>"   >> $VRT


Hope it's useful to some.
Regards,
Zoltan


-- 

===========================================
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:    +27-86-6115323     www.geograph.co.za
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