Versions Compared

Old Version 5

changes.mady.by.user Timothy McPhillips

Saved on

compared with

New Version Current

changes.mady.by.user Timothy McPhillips

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

Data preparation times

Inputs latong Example
  • GeoTIFF format
  • 2000 bands (years) in each
    • 156 13x12 spatial grid) per file 1 band in each file
    ScriptRun descriptionInput filesInput data sizeIntermediate filesIntermediate data sizeOutput filesOutput data sizeExecution time on Ulysses
    process.plPPT_water_year reconstructions from PaleoCAR

     {

    long}W{I

    at}N.recon.tif

    • GeoTIFF format
    • Example: 113W35N.recon.tif

    4810 MB

    • 155 files (
    • 13° x 12°)1
    • Each file2:
      • 30.8 MB
      • (average)
      • 120 x 120 pixels
      • 1° x 1° coverage
      • 30" x 30" pixel size
      • 2000 bands (years)
      • 16 bit integer values
      • Compressed to ~56% expected size

     

    merge{long}W_comb_{year}.tif

    • GeoTIFF format
    • Example: merge_998
      113W_comb_1999.tif

    8580 MB

    • 26000 files (13 x 2000)
    • Each file3:
      • 308 KB
      • 120 x 1440 pixels
      • 1° x 12° coverage
      • 30" x 30" pixel size
      • 1 band
      • 16 bit integer values
      • Not compressed

    merge_{year}.tif

    • GeoTIFF format
    • Example: merge_1999.tif

    8581 MB

    • 2000 files (1 per year)
    • Each file4:
      • 4.3 MB
      • 1560 x 1440 pixels
      • 13° x 12° coverage
      • 30" x 30" pixel size
      • 1 band
      • 16 bit integer values
      • Not compressed

    105 minutes

     

     

    1The 155 input files nearly form a 13x12 grid, missing just the file that would otherwise occupy the southwest corner of the grid. 
    2The input files corresponding to the westmost blocks are 1 pixel (30") narrower, i.e. 119 x 120 pixels, 0°59'30" x 1° coverage.
    3The intermediate files corresponding to the westmost strips are 1 pixel (30") narrower and 120 pixels (1°) shorter than the other strips, i.e. 119 x 1320 pixels, 0°59'30" x 11° coverage.
    4The westmost 1-pixel (30") wide column in each output file does not correspond to data in any input file. Nor does the southwest-most 120 x 120 pixel (1° x 1°) block in each file.