[Live-demo] Provide .fix files for all Shapefiles

Tue Aug 10 12:38:41 EDT 2010

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Hi

1. good news: I debugged AtlasStyler and Geopublisher today a OSGeoLive
system and fixed all the problems reported.
AS and GP now have no more problems when opening a Shapefile without a
.fix spatial index from a read-only drive - it doesn't try to create the
index anymore.

2. The problem with read-only and .fix lies in Geotools, so it affects
uDig also.

3. I created a patch for Geotools
(http://jira.codehaus.org/browse/GEOT-3245) but it is not yet reviewed.

Options are:

A: Get the patch into Geotools and make a new release of Geotools and uDig

Advantage: No big changes on the OSGeo side.

Disadvantage: Lots of work for Jody. uDig, Geopublisher, AtlasStyler and
will not profit from a spatial index when working with the demo
shapefile data.

B: Create .fix indexes during build after the Shapefiles are unzipped
and while the drive is still read-write.

.fix are Geotools-specific, so ogr doesn't create these files. We need a
command line tool to add .fix indexes if we want it to be done in
'bin/loadgisdata.sh'. Such a tool doesn't exists yet... So i added a
command line option to AtlasStyler 1.5 that does exactly that.

So for option B, we have to do only one thing: Add a line to
'bin/install_atlasStyler' that will add a spatial index to all
shapefiles in the $DATA_FOLDER:
>find $DATA_FOLDER -iname "*.shp" -exec atlasstyler "addFix={}" \;

This REQUIRES that 'bin/loadgisdata.sh' is run before
install_AtlasStyler.sh is run.

Actually install_Gisdata is setting the data read-only already. So in
the install_AtlasStyler.sh i will have to change the permissions twice..
something not so nice.

Advantage: No quick re-releasing of Geotools and uDig just for one patch
two days after the last release.

Disadvantage: Some unorthodox modifications on the install scripts.

A or B ? Waiting for feedback.

Greetings,
Steve

Am 10.08.2010 13:33, schrieb Cameron Shorter:
> The naturalearth data shapefiles are loaded by bin/loadgisdata.sh
> 
> It is loaded from the naturalearth website directly.
> 
> I'm open to you adding .fix files if you think it is easy enough to
> achieve.
> 
> On 10/08/10 21:10, Stefan A. Tzeggai wrote:
> Hi
> 
> I have installed the rc5 to my HDD and started investigating the
> problems reported for AtlasStyler and Geopublisher. This is what happens:
> 
> The natural earth shapes don't have .fix spatial indexes. AtlasStyler
> tries to create them on-the-fly and gets a permission exception.
> 
> I will write a fix, so that that will not be a problem anymore, but
> maybe we should anyways add .fix files to all Shapefiles on the DVD.
> 
> .fix files are supported by Geotools, so uDig, Geoserver,
> Geopublisher and AtlasStyler (and probably more) would profit
> performance-wise.
> 
> The data dir is not in the svn.. Tell me where it is, and i can provide
> .fix files for all shapefiles.
> 
> Greetings,
> Steve
> 
> 
> 
> 
> -- wiki² - Softwareentwicklung
> Stefan A. Tzeggai, geb. Krüger
> Straßburger Weg 26
> 53113 Bonn
> 
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> mobile  0176 40 38 9559
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> 
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- -- 
wiki² - Softwareentwicklung
Stefan A. Tzeggai, geb. Krüger
Straßburger Weg 26
53113 Bonn

email   tzeggai at wikisquare.de
phone   0228 24 000 528
mobile  0176 40 38 9559
webpage wikisquare.de
twitter http://twitter.com/geopublishing
skype   alfonx

reclaim your net - http://tor.eff.org
enforce privacy - http://www.pgpi.org
pgp key id: 51B576FD - http://pgp.mit.edu

Please note that according to the German law on data retention,
information on every electronic information exchange with me is
retained for a period of six months.
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