[Proj] Converting to WGS84 Latitude/Longitude

[Artur Bercik]

On Fri, Oct 24, 2014 at 3:50 PM, Mikael Rittri <Mikael.Rittri at carmenta.com>
wrote:

>   Hi Artur.
>
>
>
> It could be the same thing. “Geodetic” latitude is the same as ordinary,
>
> everyday latitude. There are some other flavours of latitude as well,
>
> auxiliary latitudes that are mainly used to simplify some kinds of
>
> computations, but “geodetic” is the ordinary kind.
>
>
>
> For longitudes, there is only one flavour, but the zero meridian is
>
> not always Greenwich.
>
>
>
> So the coordinates you mention could be in WGS84 Lat/Long already.
>
> But it is not certain, since they could be expressed in some other
>
> geodetic datum that uses a different ellipsoid.
>
>
>
> Do you have any documentation about the geodetic datum of your
> coordinates (like Pulkovo 1942, Pulkovo 1995, PZ 1990, or WGS84),
>
> or about the ellipsoid used?
>

Dear Mikael Rittri

Thanks for your answer.
Actually, I could not understand which datum or ellepsoid was used. The
following documents says only geodetic latitude and longitude:

http://modaps.nascom.nasa.gov/services/about/products/MOD03.html

I have read the above data product; and retrieved the pairs of geodetic
lats and lons as the document says, but could not figure out if  I should
convert them into WGS84 or not. I have to compare the data using above
product with other data which are in WGS84 lats and lons.

>
>
> Best regards,
>
>
>
> Mikael Rittri
>
> Carmenta
>
> Sweden
>
> http://www.carmenta.com
>
>
>  ------------------------------
>
> *From:* proj-bounces at lists.maptools.org [mailto:
> proj-bounces at lists.maptools.org] *On Behalf Of *Artur Bercik
> *Sent:* Friday, October 24, 2014 8:27 AM
> *To:* proj at lists.maptools.org
> *Subject:* [Proj] (no subject)
>
>
>
> Dear Proj list members:
>
> Being a very new in this field, could someone answer me about the
> following problem:
>
> I have a pair of Geodetic Latitude and Geodetic Longitude (50.89524,
> 117.69043).
> How can I convert it into Latitude and Longitude with WGS84 Ellepsoid?
>
> Thanks in the advance.
>
> Artur
>
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