[gdal-dev] MapServer and GDAL daily build Windows binaries available

2009-02-25 Thread Tamas Szekeres
Hi All,

I've set up a build server providing daily snapshot builds for various
compilers/architectures and created a root page containing the links to the
results (along with the build SDKs have been used for the builds)

http://vbkto.dyndns.org:1280/sdk/index.html

You can simply download and use any of the build snapshots to be able to
obtain the Windows binaries with the recent fixes without requiring to
compile by yourself. But if you would rather compile by hand (eg for
debugging purposes) just pick up the SDK packages providing a ready to use
compile environment for all of those platforms enumerated.

You may encounter some features missing (like swigpython binaries,
mapscript-java etc) which are about to be added shortly, after I make sure
those are working equally well on all platforms. I'll also provide links to
the corresponding autotest results until the buildbot configuration is not
resurrected.



Best regards,

Tamas
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Re: [gdal-dev] MapServer and GDAL daily build Windows binaries available

2009-02-25 Thread Even Rouault
Tamas,

this is a very good initiative ! It works pretty well as I've been able to run 
the Java GDAL apps from trunk under Wine ! (The apps themselves are not 
included in the bin/gdal/java directory of your packages, as they were 
missing from the ant build.xml. I've just commited a change in r16417, so 
that the .class should be generated in swig/java/build/apps)

wine 
~/.wine/c/Program\Files/Java/jre6/bin/java.exe -cp 
"../../swig/java/apps;./gdal.jar" 
gdalinfo byte.tif

(And I also hope we'll see buildbot working again soon.)

Best regards.

Even

Le Wednesday 25 February 2009 22:34:37 Tamas Szekeres, vous avez écrit :
> Hi All,
>
> I've set up a build server providing daily snapshot builds for various
> compilers/architectures and created a root page containing the links to the
> results (along with the build SDKs have been used for the builds)
>
> http://vbkto.dyndns.org:1280/sdk/index.html
>
> You can simply download and use any of the build snapshots to be able to
> obtain the Windows binaries with the recent fixes without requiring to
> compile by yourself. But if you would rather compile by hand (eg for
> debugging purposes) just pick up the SDK packages providing a ready to use
> compile environment for all of those platforms enumerated.
>
> You may encounter some features missing (like swigpython binaries,
> mapscript-java etc) which are about to be added shortly, after I make sure
> those are working equally well on all platforms. I'll also provide links to
> the corresponding autotest results until the buildbot configuration is not
> resurrected.
>
>
>
> Best regards,
>
> Tamas


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[gdal-dev] weeding out x,y,z points

2009-02-25 Thread nicholas . g . lawrence

A client has a very large (millions of records) ascii file consisting
solely of x,y,z co-ordinates.

They would like to reduce the number of records by weeking out points that
are too close to each other.

Can GDAL or OGR weed out 3D points based on proximity to each other?

Regards,
nick


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Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Mateusz Loskot
nicholas.g.lawre...@mainroads.qld.gov.au wrote:
> A client has a very large (millions of records) ascii file consisting
>  solely of x,y,z co-ordinates.
> 
> They would like to reduce the number of records by weeking out points
> that are too close to each other.
> 
> Can GDAL or OGR weed out 3D points based on proximity to each other?

Perhaps libLAS (http://liblas.org/) and its utils will help, try txt2las
with -scale or -xyz_scale option:

http://liblas.org/browser/trunk/doc/txt2las.txt

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org
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Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Joaquim Luis

nicholas.g.lawre...@mainroads.qld.gov.au wrote:

A client has a very large (millions of records) ascii file consisting
solely of x,y,z co-ordinates.

They would like to reduce the number of records by weeking out points that
are too close to each other.

Can GDAL or OGR weed out 3D points based on proximity to each other?



A job for GMT's blockmean or blockmedian.

Joaquim Luis
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Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread nicholas . g . lawrence
> nicholas.g.lawre...@mainroads.qld.gov.au wrote:
> > A client has a very large (millions of records) ascii file consisting
> > solely of x,y,z co-ordinates.
> >
> > They would like to reduce the number of records by weeking out points
that
> > are too close to each other.
> >
> > Can GDAL or OGR weed out 3D points based on proximity to each other?

>
> A job for GMT's blockmean or blockmedian.

> Joaquim Luis

Okay, I downloaded the Manpages.

My initial reading is that blockmean and blockmedian work by averaging
the values.

My client says that they want the resulting data points to be
a subset of the original data points, that is the process should
delete points, not re-calculate new ones that are an average.

Is this still do-able? Is there a specific option I should
be looking at?

Regards,
nick


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Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Ari Jolma

nicholas.g.lawre...@mainroads.qld.gov.au wrote:

nicholas.g.lawre...@mainroads.qld.gov.au wrote:


A client has a very large (millions of records) ascii file consisting
solely of x,y,z co-ordinates.

They would like to reduce the number of records by weeking out points that
  
are too close to each other.


Can GDAL or OGR weed out 3D points based on proximity to each other?
  


My client says that they want the resulting data points to be
a subset of the original data points, that is the process should
delete points, not re-calculate new ones that are an average.
  



I would use plain Perl (or Python or high level language X) to read in 
the points sequentially and discard new ones that are "too close" to 
existing ones. It may take a while & require a bit of memory it is 
probably doable that way (millions of points but not 100s of millions in 
the end set). The program shouldn't need to be more than 20 lines I guess.


This is doable in plain programming language since distance is so easy 
to compute. If you had polygons or linestrings then GDAL+GEOS would be 
natural additional tools.


Ari

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