Re: Map Projection: Satellite versus Orthographic

Hi all,

Just a small correction to Dave's URL. It should be:

http://www.ncarg.ucar.edu/ngdoc/ng/supplements/ezmap/#AzimuthalProjections

The other one will work, but it is deprecated.

--Mary

On Fri, 12 Oct 2007, David Brown wrote:

> Hi Bruce,
>
> The Satellite projection is a perspective view from space that requires more
> parameters to fully
> specify. The resources mpSatelliteAngle1F, mpSatelliteAngle2F and
> mpSatelliteDistF apply only to
> the Satellite projection. Given the default settings of these parameters, you
> are correct that the Satellite
> projection defaults to an Orthographic projection.
>
> The Orthographic projection is essentially a limiting case of the Satellite
> view where the
> distance is theoretically infinite.
>
> You can find a more detailed discussion of these projections and the
> parameters in the documentation of the
> low level Fortran package that NCL relies on at:
>
> http://ngwww.ucar.edu/ngdoc/ng4.4/supplements/ezmap/#AzimuthalProjections
>
> -dave
>
> On Oct 12, 2007, at 12:59 PM, Lunde, Bruce N CIV NAVOCEANO, NP1 wrote:
>
>> Hello,
>>
>> Is there any difference between the
>> Satellite and Orthographic projections ?
>>
>> Thanks, Bruce
>>
>> =====
>> Bruce Lunde
>> Bruce.Lunde_at_navy.mil
>> 228-688-5843
>> Code NP1
>> Naval Oceanographic Office
>> Stennis Space Center, MS
>> =====
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>> ncl-talk mailing list
>> ncl-talk_at_ucar.edu
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>
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Received on Fri Oct 12 2007 - 13:46:52 MDT