Re: polygonal area on a sphere

Hi,
please, someone can tell me how can I to calculate the area of a
polygon on the earth's surface where I know the coordinates (lat/lon)
of its points?

The area is equal to the spherical excess,
which can be calculated directly from the coordinates.

For small polygons use plane trig,

Please, can you teach me or indicate an url where I can learn to
calculate the spherical excees from (lon, lat) coordinates?
Thanks


.

Relevant Pages

  • Re: polygonal area on a sphere
    ... polygon on the earth's surface where I know the coordinates (lat/lon) ... The area is equal to the spherical excess, ... For small polygons use plane trig, ...
    (sci.geo.satellite-nav)
  • Re: polygonal area on a sphere
    ... polygon on the earth's surface where I know the coordinates (lat/lon) ... The area is equal to the spherical excess, ... For small polygons use plane trig, ...
    (sci.geo.satellite-nav)
  • Re: polygonal area on a sphere
    ... If your polygon is small enough to allow you to ignore the Earth's curvature, you can use the following formula. ... You need to convert lat/lon to x-y coordinates. ... If the polygon lies within one UTM region, you can just convert lat/lon to UTM and use the UTM coordinates. ...
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  • Re: polygonal area on a sphere
    ... polygon on the earth's surface where I know the coordinates (lat/lon) ... triangles. ... Sum the areas. ...
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