Siva, If you want to remove features with duplicate centroids, it is not safe to use the spatial filter directly. A centroid may lie outside the geometry.
Make a duplicate layer using OGRDataSource::CopyLayer() and replace the geometry in each feature with its centroid. So, the duplicate layer will have all the corresponding centroids. Now you can loop through each feature in the original layer and then get coinciding points by applying a spatial filter on the duplicate layer. Let us know how it went. On Wed, Feb 20, 2013 at 12:04 PM, SIVA RAMA KRISHNA <s.r.kriis...@gmail.com>wrote: > Chaitanya, > Fine i got your point .I wanted to know when do different features have > same centroids for removing duplicate centriods > > With Regards > -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E
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