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Measure the total area of a polygon
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Measure the total area of a polygon Josh 06-19-2006
Posted by Josh on June 19, 2006, 2:19 am
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 Anyone can help and tell me how to measure the total area of a polygon.




Posted by rsmgeo on June 19, 2006, 3:51 am
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Josh schrieb:

> Anyone can help and tell me how to measure the total area of a polygon.

Depends on what software you are using. If you have to implement the
algorithm yourself this is how it works: You look for the polygon
points with minimum and maximum x-value. You iterate the 'upper'
segment between the two points and sum the area under each segment i.e.
the area between the segment and the x-axis. When you have reached the
point with maximum x-value you turn to the 'lower' segments. You
iterate through these segments to make your way back to the starting
point. This time you subtract the areas below the segments from the
total in order to finally achieve the polygon area.

http://astronomy.swin.edu.au/~pbourke/geometry/polyarea/


Posted by Uffe Kousgaard on June 19, 2006, 6:34 am
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http://astronomy.swin.edu.au/~pbourke/geometry/polyarea/

> Anyone can help and tell me how to measure the total area of a polygon.
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Posted by Josh on June 19, 2006, 9:19 pm
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I am using ArcView 9.X. Do you know any simple way to measure it?

Joshua


> Anyone can help and tell me how to measure the total area of a polygon.
>
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Posted by news.tele.dk on June 20, 2006, 3:32 am
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If I get you right is "Calculate Areas" what you are looking for.... Launch
Toolbox - click Index ... and find .... Calculate Areas.

:-) Poul

>I am using ArcView 9.X. Do you know any simple way to measure it?
>
> Joshua
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> ¼¶¼g©ó¶l¥ó·s»D:e75fgc$odu$1@nnews.pacific.net.hk...
>> Anyone can help and tell me how to measure the total area of a polygon.
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