I am using ArcGIS 10.1. How do I calculate an accurate area measure for a polygon, where portions of it are falling in two zones, i.e. UTM ZONE 44 & 45 (India)?
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1do you want area in just those two zones? or area in each zone? – klewis Apr 07 '16 at 16:23
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2Accurate is relative here. Have you looked at this yet: http://gis.stackexchange.com/questions/3761/dealing-with-data-that-spreads-across-utm-zones – John Apr 07 '16 at 16:31
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1And this: http://gis.stackexchange.com/questions/31701/calculate-distortion-outside-a-utm-zone/31711#31711 – mwalker Apr 07 '16 at 16:32
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This is a FAQ: see http://gis.stackexchange.com/search?q=polygon+area+accurate+calculate . The short answer: use an equal-area projection. – whuber Apr 07 '16 at 22:01