As of version 4.1 of the Developer Toolbox, we have created the "Gold Medal" award for most outstanding contribution to the DT. For this go'round, we are extremely proud to have a sampling of satellite image data of Earth which has been processed by WorldSat International, in Ontario, Canada. The methods used to create the four files included are described in detail in the data/images/WorldSat/README file. Three rgb SGI image files were created from these tif files with the toolbox/src/haeberli/imgtools/fromtiff program and then zoomed down to 512x256 and 256x256 sizes with toolbox/src/haeberli/imgtools/izoom, to provide sample ready-to-go texture maps.

It is hoped other developers will recognize the benefits of participating in such an exchange of information by considering potential contributions they might make to the Developer Toolbox. At this time, the "panel of judges" consist solely of the toolbox janitor and his sidekick piano. Criteria for what constitutes "the most outstanding contribution" are various and fluid, determined solely by the janitor. But, what *is* certain is that unusual and innovative data files, utilities, and/or source implementations, are given special consideration and attention. Please contact the DTjanitor@sgi.com, if you would like to explore the possibilities of submitting a contribution for consideration in the next Toolbox. The bottom line is, if you've created something you think might be potentially useful for anyone else, and would like to give it wider play, the janitor wants to "hear" from you.


a bit of extra information on this directory's image files and their content:

Earth.tif (2615x1308 pixels, 4375830 bytes ) depicting the Earth at 18km per pixel resolution.

WorldSat's new 1km cloud-free mosaic of earth, currently in production, will be 40,079.88 pixels by 20,039.94 lines (pixels), presented in an equirectangular projection having 111.333 pixels per degree. For those concerned about disk space, the new scene at 24-bit resolution will require 2.4 gigabytes of disk space. At 1km resolution, distinguishing features such as contrails from jet aircraft, cities, and several man-made features can clearly be seen.

Image processing by Jim Knighton and Robert Stacey.
Copyright, WorldSat International Inc., 1993.
Mississauga, Ontario, Canada

All Rights Reserved.

For information regarding licensing of these or their full resolution counterparts, contact WorldSat International at (905) 795-0110, or visit http://www.worldsat.ca/

% ../../../src/haeberli/libtiff/tools/tiffinfo *.tif
Atlantic_Basin.tif:
  Subfile Type: (0 = 0x0)
  Image Width: 1080 Image Length: 1080
  Resolution: 72, 72 pixels/inch
  Bits/Sample: 8
  Compression Scheme: Lempel-Ziv & Welch encoding
  Photometric Interpretation: RGB color
  Predictor: horizontal differencing
  Samples/Pixel: 3
  Rows/Strip: 2
  Planar Configuration: single image plane
Bathy.tif:
  Subfile Type: (0 = 0x0)
  Image Width: 2160 Image Length: 1080
  Resolution: 72, 72 pixels/inch
  Bits/Sample: 8
  Compression Scheme: Lempel-Ziv & Welch encoding
  Photometric Interpretation: RGB color
  Predictor: horizontal differencing
  Samples/Pixel: 3
  Rows/Strip: 1
  Planar Configuration: single image plane
Earth.tif:
  Subfile Type: (0 = 0x0)
  Image Width: 2615 Image Length: 1308
  Resolution: 72, 72 pixels/inch
  Bits/Sample: 8
  Compression Scheme: Lempel-Ziv & Welch encoding
  Photometric Interpretation: RGB color
  Predictor: horizontal differencing
  Samples/Pixel: 3
  Rows/Strip: 1
  Planar Configuration: single image plane
Pacific_Basin.tif:
  Subfile Type: (0 = 0x0)
  Image Width: 1080 Image Length: 1250
  Resolution: 72, 72 pixels/inch
  Bits/Sample: 8
  Compression Scheme: Lempel-Ziv & Welch encoding
  Photometric Interpretation: RGB color
  Predictor: horizontal differencing
  Samples/Pixel: 3
  Rows/Strip: 2
  Planar Configuration: single image plane

% istat *.rgb
xsize ysize zsize   min   max  bpp  type  storage name
  512   512     3     0   255   1  NORMAL  rle    Atlantic_Basin.rgb
  512   256     3    14   255   1  NORMAL  rle    Bathy.rgb
  512   256     3     0   255   1  NORMAL  rle    Earth.rgb