Dmitry Kazimirov wrote:
Greetings,
I currently trying to convert image data in grib2 format
(specification is here if someone interested-
http://www.weather.gov/forecasts/graphical/docs/grib_design.html, my
datafeed is using 'Template 30' i.e. Lambert Conform Conic Projection)
and rewarp it to other projection
I have data about projection(they are sometimes changed)
Lambert Conformal: (614 x 428) input WE:SN output WE:SN res 8 mode 8
Lat1 12.190000 - latitude of first grid point
Lon1 226.541000 - longitude of first grid point
LoV 265.000000 - Orientation longitude (?)
LatD 25.000000 - "Latitude where grid spacing is defined"
Latin1 25.000000 Latin1, first secant latitude
Latin2 25.000000 Latin2, second secant latitude (
LatSP -90.000000 LonSP 0.000000 - Latitude and longitude of southern pole (?)
Dx 12190.528000 m - Dx, X-direction grid length
Dy 12190.590000 m - Dy, Y-direction grid length
GDAL Georeference's SetLCC require parameters
SetLCC ( double dfStdP1,
double dfStdP2,
double dfCenterLat,
double dfCenterLong,
double dfFalseEasting,
double dfFalseNorthing
)
(uncommented at all)
how I use my parameters to with GDAL?
I understood that dfStdP1/P2 is 1st/2nd standard parallel(25.0000 in my case)
What I should use fort dfCenterLat/Long?
for falseEasting/Northing?
Could anyone help?
Dmitry,
I don't have any good help. I find the way that the GRIB folks describe
coordinate systems *very* hard to relate to normal GIS/Cartography
terminology. I will note that the grib driver has this logic for
some LCC coordinate systems:
case GS3_LAMBERT:
oSRS.SetLCC(meta->gds.scaleLat1, meta->gds.scaleLat2,
0.0, meta->gds.orientLon,
0.0, 0.0); // set projection
I don't know if that helps at all or not.
Good luck,
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