i am working with NWS rainfall data, and the grib file comes in as Polar Stereographic, with a custom datum. I am trying to reproject to WGS84, but so far no luck.
thank you
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A spherical coordinate system is a naff globe with very low accuracy. Maybe there has been a typo in the EPSG number? Anyway you won't lose any significant precision by assuming that the datum is WGS84 if it is really Polar Stereographic. Is your data at the poles?
To debug the data further, have a look at the coordinates or transformation parameters to see if they are plausible.
no, this data is for CONUS, and is provided by national weather service. reprojecting to WGS does not work, because FME does not recognize this "custom" datum.