plate caree and EPSG:4326

[Alfredo Alessandrini]

Hi,

I'm trying to reproject the VGT-P product with the gdal libraries.

The metafile is reported below.

It's right to assume the EPSG 4326 code as source spatial reference set?


Thanks,

Alfredo


MAP_PROJ_NAME             PLATE_CARREE_1KMG nom provisoirement egal au code
MAP_PROJ_FAMILY           UNPROJECTED
MAP_PROJ_CODE             PLATE_CARREE_1KMG
MAP_PROJ_UNIT             DEGREES
MAP_PROJ_RESOLUTION       0.0089285714
GEODETIC_SYST_NAME        WGS 1984
GEODETIC_SYST_CODE        WG84
HORIZ_DATUM               WGS 1984
MERIDIAN_NAME             GREENWICH
MERIDIAN_ORIGIN           +000.000
SPHEROID_NAME             WGS 1984
SPHEROID_SEMI_MAJ_AXIS    6378137.000
SPHEROID_SEMI_MIN_AXIS    6356752.314
CARTO_UPPER_LEFT_X          91.267857
CARTO_UPPER_LEFT_Y          72.232143
CARTO_UPPER_RIGHT_X        154.160714
CARTO_UPPER_RIGHT_Y         72.232143
CARTO_LOWER_RIGHT_X        154.160714
CARTO_LOWER_RIGHT_Y         -8.241071
CARTO_LOWER_LEFT_X          91.267857
CARTO_LOWER_LEFT_Y          -8.241071

[Jose Gomez-Dans]

Hi

On 30 January 2012 13:28, Alfredo Alessandrini <[hidden email]> wrote:

Hi,

I'm trying to reproject the VGT-P product with the gdal libraries.
It's right to assume the EPSG 4326 code as source spatial reference set?

I don't think they are the same. Plate Carree is an equidistance cylindrical projection. I used a different EPSG (32662) for this same data with success, although it shows are "deprecated"...:

http://spatialreference.org/ref/epsg/32662/

 

Hope that helps

Jose

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[Jean-Claude Repetto]

Le 30/01/2012 14:28, Alfredo Alessandrini a écrit :
> Hi,
>
> I'm trying to reproject the VGT-P product with the gdal libraries.
>
> The metafile is reported below.
>
> It's right to assume the EPSG 4326 code as source spatial reference set?
>

Yes, I think so. But it is not a Plate Carrée projection, since the
units would have been meters, not degrees. It is sometimes called
"Geodetic Projection" (see http://www.dme.nt.gov.au/IWSDoc/html/295.htm ).

Jean-Claude
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[Jean-Claude Repetto]

Le 30/01/2012 15:05, Jose Gomez-Dans a écrit :
>
> I don't think they are the same. Plate Carree is an equidistance
> cylindrical projection. I used a different EPSG (32662) for this same
> data with success, although it shows are "deprecated"...:
> http://spatialreference.org/ref/epsg/32662/
>
> Jose
>

spatialreference.org says it has been replaced by EPSG:32663 .

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[Alfredo Alessandrini]

Hi,

the EPSG (32662) code is projected and in meters. But my metafile is
in degrees.


Alfredo

2012/1/30 Jose Gomez-Dans <[hidden email]>:

> Hi
>
>
>
> On 30 January 2012 13:28, Alfredo Alessandrini <[hidden email]> wrote:
>>
>> Hi,
>>
>> I'm trying to reproject the VGT-P product with the gdal libraries.
>> It's right to assume the EPSG 4326 code as source spatial reference set?
>
>
> I don't think they are the same. Plate Carree is an equidistance cylindrical
> projection. I used a different EPSG (32662) for this same data with success,
> although it shows are "deprecated"...:
> http://spatialreference.org/ref/epsg/32662/
>
> Hope that helps
> Jose

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[Vincent Schut]

On 01/30/2012 02:28 PM, Alfredo Alessandrini wrote:
> Hi,
>
> I'm trying to reproject the VGT-P product with the gdal libraries.
>
> The metafile is reported below.
>
> It's right to assume the EPSG 4326 code as source spatial reference set?

Probably, yes.
I have always used 4326 for spot vgt products, without any problems,
though I must mention that I mainly worked with areas located around the
equator. I think the 'plate carree' mentioned in the metadata is
misleading; as far as I know svgt products are in latlong unprojected space.

Vincent.

>
>
> Thanks,
>
> Alfredo
>
>
> MAP_PROJ_NAME             PLATE_CARREE_1KMG nom provisoirement egal au code
> MAP_PROJ_FAMILY           UNPROJECTED
> MAP_PROJ_CODE             PLATE_CARREE_1KMG
> MAP_PROJ_UNIT             DEGREES
> MAP_PROJ_RESOLUTION       0.0089285714
> GEODETIC_SYST_NAME        WGS 1984
> GEODETIC_SYST_CODE        WG84
> HORIZ_DATUM               WGS 1984
> MERIDIAN_NAME             GREENWICH
> MERIDIAN_ORIGIN           +000.000
> SPHEROID_NAME             WGS 1984
> SPHEROID_SEMI_MAJ_AXIS    6378137.000
> SPHEROID_SEMI_MIN_AXIS    6356752.314
> CARTO_UPPER_LEFT_X          91.267857
> CARTO_UPPER_LEFT_Y          72.232143
> CARTO_UPPER_RIGHT_X        154.160714
> CARTO_UPPER_RIGHT_Y         72.232143
> CARTO_LOWER_RIGHT_X        154.160714
> CARTO_LOWER_RIGHT_Y         -8.241071
> CARTO_LOWER_LEFT_X          91.267857
> CARTO_LOWER_LEFT_Y          -8.241071
>
>
> --
> View this message in context: http://osgeo-org.1560.n6.nabble.com/plate-caree-and-EPSG-4326-tp4350647p4350647.html
> Sent from the GDAL - Dev mailing list archive at Nabble.com.
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