[gdal-dev] mosaiced SAR in geotiff

[Gong, Shawn]

Hi list,

I have simulated RCM Complex SLC in mosaiced geotiff format that I don't know how to deal with.
Is there a driver for it, similar to SPOT7 mosaiced product?

I tried to use gdalbuildvrt and gdal_merge but neither worked because the mosaiced geotiff are not georeferenced. Each chip has only 4 corner GCPs.

Should I use set_geotransform( ), then gdalbuildvrt ?

gdalinfo output:
Driver: GTiff/GeoTIFF
Files: PGS_TD_PR_GenIm_MRes30_1_PT_1_HH_0.tif
Size is 2407, 291
Coordinate System is `'
GCP Projection =
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
GCP[  0]: Id=1, Info=
          (0.5,0.5) -> (-21.411272470412,-80.7062573860622,0)
GCP[  1]: Id=2, Info=
          (2406.5,0.5) -> (-21.4712880925672,-80.4068317341721,0)
GCP[  2]: Id=3, Info=
          (2406.5,290.5) -> (-21.1149325668978,-80.4046874263347,0)
GCP[  3]: Id=4, Info=
          (0.5,290.5) -> (-21.0437603692169,-80.7040392737628,0)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_DATETIME=2018:04:05 17:40:44
  TIFFTAG_IMAGEDESCRIPTION=HH
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,  291.0)
Upper Right ( 2407.0,    0.0)
Lower Right ( 2407.0,  291.0)
Center      ( 1203.5,  145.5)
Band 1 Block=2407x217 Type=Int16, ColorInterp=Gray
Band 2 Block=2407x217 Type=Int16, ColorInterp=Undefined

**.tif.tiffinfo:
TIFF Directory at offset 0x3fc280 (4178560)
  Image Width: 2407 Image Length: 291
  Bits/Sample: 16
  Sample Format: signed integer
  Compression Scheme: None
  Photometric Interpretation: min-is-black
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 2
  Rows/Strip: 217
  Planar Configuration: single image plane
  ImageDescription: HH
  DateTime: 2018:04:05 17:40:44
--GeoTIFF Tags--
  Geo Tiepoints:
     ( 0.500000 0.500000 0.000000)->( -21.411272 -80.706257 0.000000)
 ( 2406.500000 0.500000 0.000000)->( -21.471288 -80.406832 0.000000)
 ( 2406.500000 290.500000 0.000000)->( -21.114933 -80.404687 0.000000)
 ( 0.500000 290.500000 0.000000)->( -21.043760 -80.704039 0.000000)
  GeoKey Directory:(present)
  GeoKey Double Params:(present)
  GeoKey ASCII Parameters:(present)

**.tif.listgeo:
Geotiff_Information:
   Version: 1
   Key_Revision: 1.0
   Tagged_Information:
      ModelTiepointTag (8,3):
         0.5              0.5              0
         -21.411272470412 -80.70625738606220
         2406.5           0.5              0
         -21.4712880925672-80.40683173417210
         2406.5           290.5            0
         -21.1149325668978-80.40468742633470
         0.5              290.5            0
         -21.0437603692169-80.70403927376280
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeGeographic
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      GTCitationGeoKey (Ascii,27): "Uncorrected Satellite Data"
      GeographicTypeGeoKey (Short,1): GCS_WGS_84
      GeogCitationGeoKey (Ascii,6): "WGS84"
      GeogGeodeticDatumGeoKey (Short,1): Datum_WGS84
      GeogLinearUnitsGeoKey (Short,1): Linear_Meter
      GeogAngularUnitsGeoKey (Short,1): Angular_Degree
      GeogEllipsoidGeoKey (Short,1): Ellipse_WGS_84
      GeogSemiMajorAxisGeoKey (Double,1): 6378137
      GeogSemiMinorAxisGeoKey (Double,1): 6356752.31424518
      End_Of_Keys.
   End_Of_Geotiff.
GCS: 4326/WGS 84
Datum: 6326/World Geodetic System 1984
Ellipsoid: 7030/WGS 84 (6378137.00,6356752.31)
Prime Meridian: 8901/Greenwich (0.000000/  0d 0' 0.00"E)
Corner Coordinates:
 ... unable to transform points between pixel/line and PCS space


Thanks,
Shawn

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