Metadata file for: TC_World_Robinson.ecw
Content: TerraColor World color shaded relief image with northeast shading
Area of coverage: World in Robinson map projection
Date created: 2003
Source data for elevation: Global Land One-Km Base Elevation (GLOBE) Project
Source data for bathymetry: Smith & Sandwell Bathymetry & USGS ETOPO5
Processed by: Earthstar Geographics (www.es-geo.com)
Available at: www.terracolor.net

Notes: Image colors generally represent land elevations above sea level
and water depths below sea level. To add context, major inland lakes 
and rivers are colored light blue and areas with glacial ice are
colored white. Legends are included as separate TIFF image files. Sun 
shading is from the northeast, so shadows fall on the southwest side of 
topographic and bathymetric features.

Credits for source data:
Land elevations: From the Global Land One-Km Base Elevation (GLOBE) Project.
For details, see their website: http://www.ngdc.noaa.gov/seg/topo/globe.shtml

Land inland water and glacial ice: Olson Global Ecosystems 1-Km global land 
cover data base derived from AVHRR satellite imagery. (Class 12 is glacial
ice, class 14 is inland water.)  For details, see the Land Processes
Distributed Active Archive Center website: 
http://edcdaac.usgs.gov/glcc/globdoc2_0.html

Ocean bathymetry between 72 deg North and 72 Deg South: From Smith, W. H. F., 
and D. T. Sandwell, "Global seafloor topography from satellite altimetry and 
ship depth soundings." See their website for complete information:
http://topex.ucsd.edu/marine_topo/mar_topo.html

Ocean bathymetry north of 72 deg and south 72 Deg: From USGS ETOPO5 (Earth
Topography - 5 Minute).  See their website for complete information:
http://edc.usgs.gov/glis/hyper/guide/etopo5

The Robinson projection was created to improve upon the shortcomings of previous
world map projections such as Mercator. It combines the best aspects of several 
other map projections, resulting in minimal distortion of most of the Earth's 
land masses. Antarctica is still greatly distorted and the northernmost land 
masses are somewhat distorted, but this projection is commonly considered the 
best map representation of the size and shape of the Earth's landforms.

Data format: Enhanced Compressed Wavelet (ECW) Unsigned 24-bit RGB
Byte order: Intel
Number of rows: 19167
Number of columns: 37791
Number of bands: 3
Value for null pixels: None

Uncompressed file size: 2.02 GB
ECW compressed file size: 77.3 MB

Pixel size X: 900 Meters
Pixel size Y: 900 Meters

Datum: WGS84
Projection: Robinson
XY Units: Meters

Robinson projection parameters:
False Easting: 0.0 Meters
False Northing: 0.0 Meters
Central Meridian: 0.0 Degrees East

UL corner X,Y: -17005833.33E, 8625154.67N
LR corner X,Y: 17006066.67E, -8625145.33N

UL corner Lat, Long: 90:0:0.0N, 21:46:52.63E
LR corner Lat, Long: 90:0:0.0N, 21:46:40.93W

Note: Longitude extents above reflect empty areas of the
image outside the actual data (the image extends to 180E
and 180W at the equator).