[gdal-dev] Using gdalwarp with HDF files- problem reading proejction

2011-07-07 Thread António Rocha

Greetings

I have a dataset (in HDF) and I need to convert its projection. When I 
do gdalinfo I get this information:

Coordinate System is:
GEOGCS[Unknown datum based upon the Clarke 1866 ellipsoid,
   DATUM[Not specified (based on Clarke 1866 spheroid),
   SPHEROID[Clarke 1866,6378206.4,294.9786982139006,
   AUTHORITY[EPSG,7008]]],
   PRIMEM[Greenwich,0],
   UNIT[degree,0.0174532925199433]]
Origin = (-10.0013888,45.0013890)
Pixel Size = (0.0027778,-0.0027778)

But this is odd. I was suppose to get Plate-Carrée with geographic 
Lat/Long and Ref ellipsoid

WGS 84 Spherical Radius= Equatorial Radius=Re= 6378,14km)

Why am I no obtaining this information? Nevertheless, has this any 
impact or shall I use *-s_srs and define it do Plate Carée (EPSG:??) ?

*Thanks
Antonio


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Re: [gdal-dev] Using gdalwarp with HDF files- problem reading proejction

2011-07-07 Thread Joaquim Luis

António,

I don't know what is a WGS 84 Spherical Radius. WGS84 is an ellipsoid 
with Equatorial radius of 6378.137  km  (flattening 1/298.2572235630)


Why you are getting that info? Well, that's because it is encoded in the 
file (and apparently not the one you expected).


Joaquim


Greetings

I have a dataset (in HDF) and I need to convert its projection. When I 
do gdalinfo I get this information:

Coordinate System is:
GEOGCS[Unknown datum based upon the Clarke 1866 ellipsoid,
   DATUM[Not specified (based on Clarke 1866 spheroid),
   SPHEROID[Clarke 1866,6378206.4,294.9786982139006,
   AUTHORITY[EPSG,7008]]],
   PRIMEM[Greenwich,0],
   UNIT[degree,0.0174532925199433]]
Origin = (-10.0013888,45.0013890)
Pixel Size = (0.0027778,-0.0027778)

But this is odd. I was suppose to get Plate-Carrée with geographic 
Lat/Long and Ref ellipsoid

WGS 84 Spherical Radius= Equatorial Radius=Re= 6378,14km)

Why am I no obtaining this information? Nevertheless, has this any 
impact or shall I use *-s_srs and define it do Plate Carée (EPSG:??) ?

*Thanks
Antonio


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