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<div>This may not be the simplest way but you could use mapserver to draw the polygon layer as a point layer (at the centroids) and then use the wfs export format capability to export back to shapefile.</div>
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<div>Mike</div>
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<div>Michael Smith</div>
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<div>US Army Corps</div>
<div>Remote Sensing GIS/Center</div>
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<span style="font-weight:bold">From: </span>Chaitanya kumar CH <<a href="mailto:chaitanya.ch@gmail.com">chaitanya.ch@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Thu, 3 Nov 2011 08:12:39 +0530<br>
<span style="font-weight:bold">To: </span>katrin eggert <<a href="mailto:katrineggert1980@gmail.com">katrineggert1980@gmail.com</a>><br>
<span style="font-weight:bold">Cc: </span>gdal dev <<a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [gdal-dev] Extract centroids<br>
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That's exactly what I meant. None of the prebuilt utilities do that.<br>
You should try other desktop GIS programs like QGIS.<br>
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<div class="gmail_quote">On Thu, Nov 3, 2011 at 12:12 AM, katrin eggert <span dir="ltr">
<<a href="mailto:katrineggert1980@gmail.com">katrineggert1980@gmail.com</a>></span> wrote:<br>
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Hi (again ! :) )<br>
Ok you mean developing a function and use OGR library right? so none of the pre-built functions (e.g. ogr2ogr) is able to do that ?<br>
THanks<br>
Kat
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<div class="gmail_quote">2011/11/2 Chaitanya kumar CH <span dir="ltr"><<a href="mailto:chaitanya.ch@gmail.com" target="_blank">chaitanya.ch@gmail.com</a>></span><br>
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katrin,<br>
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You can programatically extract the centroids. You can use the OGR_G_Centroid() function on the geometry.<br>
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<div>On Thu, Nov 3, 2011 at 12:06 AM, katrin eggert <span dir="ltr"><<a href="mailto:katrineggert1980@gmail.com" target="_blank">katrineggert1980@gmail.com</a>></span> wrote:<br>
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<div>Greetings<br>
Just one question: I tried to find in Google if GDAL could be used to extract polygons centroids. But I was not able to find anything. Is it possible?<br>
Kat<br>
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Best regards,<br>
Chaitanya kumar CH.<br>
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<a href="tel:%2B91-9494447584" value="+919494447584" target="_blank">+91-9494447584</a><br>
17.2416N 80.1426E<br>
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Best regards,<br>
Chaitanya kumar CH.<br>
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+91-9494447584<br>
17.2416N 80.1426E<br>
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