Have a look at http://www.gdal.org/ogr/ogr_sql.html and
http://www.gdal.org/ogr2ogr.html
If you have base.{shp,shx,dbf} and addon.dbf that look like
$ ogrinfo -al -so base.shp
INFO: Open of `base.shp'
using driver `ESRI Shapefile' successful.
Layer name: base
Geometry: Multi
Hi. The first thing to note: editing a DBF with Excel Co. seems to be
a _really_ bad idea. Those who tried that got Shapes wired to wrong
attribute lines. So DBF, SHP, SHX and QIX files have to be used as a
whole or will usually end up in a corrupted dataset. I would suggest
ogr2ogr from the
I agree with Andreas,
if you just want to manipulate the shapefile and continue to use a
moded shapefile with MapServer then Spatialite ( or ogr2ogr ) can help
you, but if you want query flexibility with MapServer then postGIS is
the way to go.
On Wed, May 4, 2011 at 3:23 AM, Eichner, Andreas -
Hi Andreas,
I have looked and looked but could not find how to use ogr2ogr to do
the operation I am interested in. Could you point me in the right
direction here as to how can ogr2ogr be used to add new fields to an
existing dbf file from another dbf file. The external dbf file from
which I need
Hi,
Thanks a lot Andreas. That JOIN was the culprit as you rightly
suggested. Once I removed the join, the performance increased
exponentially. The 5 minute cgi run now took under 5 seconds which is
simply amazing. I just need one more help. Is there a DBF editor out
there that can be used to
On May 3, 2011, at 3:36 PM, Varun saraf wrote:
Hi Puneet,
Thanks a lot for the prompt reply. I tried using Excel 2007 and was
not able to re-save the dbf file after editing. Also, I am having DBF
files with about a million records and Excel tends to hang for these
operations.
Now you
Hi,
Thanks a lot for the quick help. I am a PHP/Java guy. I shall try my
luck with some sort of PHP scripting as I need a solution fairly
quickly. I had made the suggestion of shifting to a PostGIS system
quite some time back but I guess you know how it is with approvals :)
Thanks again,
Varun
Spatialite jumps into my mind.
http://www.gaia-gis.it/spatialite/
On Tue, May 3, 2011 at 3:19 PM, Varun saraf vsaraf@gmail.com wrote:
Hi,
Thanks a lot Andreas. That JOIN was the culprit as you rightly
suggested. Once I removed the join, the performance increased
exponentially. The 5
, 2011 4:06 PM
To: Varun saraf
Cc: mapserver-users@lists.osgeo.org
Subject: Re: VS: [mapserver-users] Mapserver search performance
Spatialite jumps into my mind.
http://www.gaia-gis.it/spatialite/
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mapserver-users
Hi,
AFAIK dBase files don't provide an index themselves and there's no other
way to provide one. shptree only creates an spatial index. Therefore
only queries like 'does this geometry touch/intersect/lie within a given
rectangle'can be accelerated.
I tried the shptree tool but did not see any
Hi,
I tried the shptree tool but did not see any performance improvement.
It fetched results about 4-5 seconds faster. Without QIX files, it was
5 minutes and with QIX files, it took about 4 minutes and 56 seconds.
All of my requests are based on the MAPSHAPE parameter in NQUERY
mode. I noticed
Hello Everyone,
I have programmed a GIS application using Mapserver, Google maps and
Tilecache. The functionality of this GIS application is to extract the
data (from the dbf file) for all features (Points) within a randomly
drawn user shape and doing some statistical operation on that data. I
Hi,
Shptree will help and stopwatch will tell you how much. Without spatial
index Mapserver needs to go through the whole shapefile every time. Have
a try, it will not take very many seconds to run shptree. Make different
requests, take times with and without .qix files and you will some
numbers.
Thanks a lot for the quick reply. I will give it a try.
On Mon, Apr 11, 2011 at 1:50 PM, Rahkonen Jukka
jukka.rahko...@mmmtike.fi wrote:
Hi,
Shptree will help and stopwatch will tell you how much. Without spatial
index Mapserver needs to go through the whole shapefile every time. Have
a try,
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