[Gdal-dev] converting from .ers to .tif

[Brent Fraser]

Jean-Sébastien,

  GDAL does not support .ers files directly.   However, since most .ers header files reference a data file of type "BIL" it is possible to hand craft an ESRI .hdr file header (which GDAL does support) to reference the the BIL file.  And as the .hdr header does not include a coordinate system definition, you would need to add a "-a_srs" to your gdal_translate command line.

Brent Fraser
GeoAnalytic Inc
Calgary, Alberta, Canada

  ----- Original Message ----- 
  From: Moreau ; Jean-Sébastien 
  To: gdal-dev at lists.maptools.org 
  Sent: Thursday, September 07, 2006 9:47 AM
  Subject: [Gdal-dev] converting from .ers to .tif


  Hi,

   

  I'm trying to convert some DEM files from .ers format to .tif. When I use gdalinfo on my image, I get the following output:

   

  D:\Apps\FWTools1.0.5> gdalinfo E:\Data\22k01102.ers

  Driver: EHdr/ESRI .hdr Labelled

  Size is 2798, 1409

  Coordinate System is:

  GEOGCS["NAD83",

      DATUM["North_American_Datum_1983",

          SPHEROID["GRS 1980",6378137,298.257222101,

              AUTHORITY["EPSG","7019"]],

          TOWGS84[0,0,0,0,0,0,0],

          AUTHORITY["EPSG","6269"]],

      PRIMEM["Greenwich",0,

          AUTHORITY["EPSG","8901"]],

      UNIT["degree",0.0174532925199433,

          AUTHORITY["EPSG","9108"]],

      AXIS["Lat",NORTH],

      AXIS["Long",EAST],

      AUTHORITY["EPSG","4269"]]

  Origin = (-68.250915,50.125905)

  Pixel Size = (0.00009000,-0.00009000)

  Corner Coordinates:

  Upper Left  ( -68.2509150,  50.1259050) ( 68d15'3.29"W, 50d 7'33.26"N)

  Lower Left  ( -68.2509150,  49.9990950) ( 68d15'3.29"W, 49d59'56.74"N)

  Upper Right ( -67.9990950,  50.1259050) ( 67d59'56.74"W, 50d 7'33.26"N)

  Lower Right ( -67.9990950,  49.9990950) ( 67d59'56.74"W, 49d59'56.74"N)

  Center      ( -68.1250050,  50.0625000) ( 68d 7'30.02"W, 50d 3'45.00"N)

  Band 1 Block=2798x1 Type=Byte, ColorInterp=Undefined

    NoData Value=-9999

    Metadata:

    NBITS=-1

   

  That seems to be all right. But when I try to use gdal_translate : 

   

  D:\Apps\FWTools1.0.5>gdal_translate -of GTiff E:\Data\22m01101.ers E:\Data\22m01

  101.tif

  Input file size is 2798, 1409

  0ERROR 2: CPLCalloc(): Out of memory allocating -348 bytes.

   

   

  This application has requested the Runtime to terminate it in an unusual way.

  Please contact the application's support team for more information.

   

  Is there something wrong with my command?

   

  Thanks

   

  Jean-Sébastien Moreau

   

  Centre d'information topographique de Sherbrooke
  Ressources naturelles Canada
  2144, rue King Ouest, bureau 010
  Sherbrooke (Québec) J1J 2E8
  Tél. : 819-564-5600-ext 295     Téléc. : 819-564-5698
  Courrier électronique : jmoreau at RNCan.gc.ca

  Centre for Topographic Information of Sherbrooke
  Natural Resources Canada
  2144, King Street West, Suite 010
  Sherbrooke, Quebec  J1J 2E8
  Tel.:  819-564-5600-ext 295     Fax:  819-564-5698
  E-mail:  jmoreau at NRCan.gc.ca



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