problems whit the altitude

[moduca]

hi, first, sorry for my english...

I need to know the precision that the google earth plug-in calculate
the altitude. Because I have different results in different sources.

The cords are: Latitude: -2.983110 Longitude: -79.125054

If I try whit this:
http://ws.geonames.org/gtopo30?lat=-2.742046&lng=-78.985876 the
result is 3294, in
http://ws.geonames.org/srtm3?lat=-2.742046&lng=-78.985876 the
result is 3514
in radio mobile give me 3564,
the google earth program give me 3491

but, if I try en google earth plug-in I have 2826.69, it’s a lot of
difference.

I been trying whit this: ge.getGlobe().getGroundAltitude(lat, long);


Why is that big difference?

[Roman N]

Hi moduca,

The altitude data returned by the plugin has no guarantee of any
specific accuracy; it should only be used for visual purposes (i.e.
the Monster Milktruck demo uses it to roughly estimate the ground
normal). In fact, you'll probably get different values depending on
what LOD of terrain data you've got streamed in.

Thanks,
Roman