[GRASS-user] retrieve centroids from polygons

[Niels Thevs]

Hi,

how can I extract the centroids from polygons and transform them into a 
point vector layer ? I have tiny polygons as groundtruth data for a 
satellite image analysis and I would like to retrieve the centroids as 
points so that I can use v.what.rast, in order to obtain the spectral 
information for the groundtruth data.

Best regards

Niels

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Dr. Niels Thevs
Chair of Geobotany and Landscape Ecology
Institute of Botany and Landscape Ecology
Greifswald University
Grimmer Strasse 88
17487 Greifswald
Germany

Tel.: +49-3834-86-4132
Fax:  +49-3834-86-4114

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