I am using QGIS 1.8 and I have this polygon. I want to know the area of this polygon and I have used field calculator and it shows my area as 651692439. Under the general tab, CRS is EPSG:4326 - WGS 84. So I want know what is the unit of this area? What should i do to convert the values mentioned to square meters? The vector layer is from Gujarat state of India.
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