Problems w geoTIFF/baselayer alignment even after spatially referencing to WGS 1984

MelissaTraverso — Fri, 15 Feb 2013 20:56:31 GMT

I obtained Sea Surface Temperature Data from JPL's PODAAC website for temperature front analysis. The options to download this data is in HDF or NetCDF. Both need to be converted before putting into ArcMap (not sure how to deal with the NetCDF). Therefore I used this program called NEST, similar to ENVI and batch processed the data into both GeoTIFF and ENVI formats which both open in ArcMap (However the ENVI format looks very noisy).

The original geocoded HDF information off Podacc is :
Center latitude:    34°06'38" N
Center longitude:   74°53'26" W
Upper left latitude: 26°15'02" N
Upper left longitude: 61°00'26" W
Upper right latitude: 22°59'35" N
Upper right longitude: 83°43'46" W
Lower left latitude: 44°15'36" N
Lower left longitude: 63°12'02" W
Lower right latitude: 40°15'17" N
Lower right longitude: 91°09'05" W

Well-known text format (WKT) of the image CRS:

FITTED_CS["Image CS based on WGS84(DD)",
PARAM_MT[],
GEOGCS["WGS84(DD)",
    DATUM["WGS84",
      SPHEROID["WGS84", 6378137.0, 298.257223563]],
    PRIMEM["Greenwich", 0.0],
    UNIT["degree", 0.017453292519943295],
    AXIS["Geodetic longitude", EAST],
    AXIS["Geodetic latitude", NORTH]]]
Well-known text format (WKT) of the geographical CRS:

GEOGCS["WGS84(DD)",
DATUM["WGS84",
    SPHEROID["WGS84", 6378137.0, 298.257223563]],
PRIMEM["Greenwich", 0.0],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH]]

The product uses a pixel based geo-coding.

Name of latitude band:               lat
Name of longitude band:              lon
Search radius:                       5 pixels
Valid pixel mask:                    fneq(lat,-999.0)
Crossing 180 degree meridian:        false

Geographic coordinates (lat,lon) are computed from pixel coordinates (x,y)
by linear interpolation between pixels.

Pixel coordinates (x,y) are computed from geographic coordinates (lat,lon)
by a search algorithm.

I was able to Georeference the GeoTIff files to WGS 1984 before putting them in ArcMap and was able to open them spatially referenced. However when I put them up against a base layer they are in the near vacinity of where they should be but there are pretty off not only that but the scaling is off as well. It looks like the image lost its warping through batch processing (maybe) because the Geotiff looks stretched/skewed. Does anyone know how to correct the geometry of the GeoTiff in ArcMap?

topic Problems w geoTIFF/baselayer alignment even after spatially referencing to WGS 1984 in Data Management Questions

Problems w geoTIFF/baselayer alignment even after spatially referencing to WGS 1984