[gdal-dev] Calculating polygon area

[Tyler Mitchell]

Did you get square degrees back?  Project to a meter or feet based projection to get a measure more meaningful.  

Cheers,
Tyler

On 2013-05-28, at 7:14 AM, "Federico Jurio" <federicojurio at suremptec.com.ar> wrote:



	Dear all, here I am with one question which I'm sure has such a simple answer that I already feel embarassed in advance! Here goes anyway... I'm trying to calculate the area length on a GeoTIFF file using GetArea() method of OGRPolygon class and i'm not sure which is the unit that returns.

	This is the information about the raster dataset

	"GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.2572235630016,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433],AUTHORITY[\"EPSG\",\"4326\"]]"

	Thanks for your patience
	

	-- 
	
	Federico Jurio
	
	SUR Emprendimientos Tecnológicos
	

	Perú 345  Piso 5to Oficina "B" (C1067AAG)
	
	Ciudad de Buenos Aires, Argentina
	Tel. +54 (11) 4342-2976/84
	federicojurio at suremptec.com.ar
	www.suremptec.com

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