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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] Global area calculations |
| Date: |
06/30/2005 12:20:02 PM |
| From: |
Zach Travis |
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x tools pro.
-----Original Message-----
From: gislist-bounces@lists.geocomm.com
[mailto:gislist-bounces@lists.geocomm.com]On Behalf Of Brian Klinkenberg
Sent: Wednesday, June 29, 2005 5:05 PM
To: gislist@lists.thinkburst.com
Subject: [gislist] Global area calculations
Hi,
I have a student who has a geodatabase that contains protected areas from
around the world. She needs to calculate the areas (ha) of each of the
areas. What means would people suggest as the best approach to take? She
could:
1) calculate the areas using lat/long, but apply a correction factor
(complicated if the areas extend considerably north-south).
2) divide the world into blocks and project each block using the most
suitable projection, and then calculate the areas. The question then
becomes, what projection(s) would be best, in order to reduce the number of
blocks she needs to split the world into.
3) any other choices?
Any guidance appreciated!
Thanks,
Brian
Brian Klinkenberg http://www.geog.ubc.ca/~brian
Department of Geography, UBC
1984 West Mall Visit http://eflora.bc.ca
Vancouver, B V6T 1Z2
604.822.3534 (office)
604.822.6150 (fax)
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