TerraColor® Imagery - Ocean Masking

To create TerraColor PLUS, Earthstar Geographics first developed a global land/ocean mask at 15-meter resolution that separates ocean areas from land areas. Using the mask, we processed the entire global dataset to remove clouds, ice and edges of Landsat scenes in ocean areas and fill them with a generic ocean color. This creates a clean global image without distracting clouds and image edges, makes it easy to see small islands and track ships or aircraft, and simple to use off-the-shelf for print and media applications. The boundary between land and ocean has a feather zone to soften and blend the transition. We attempted to retain shallow water, rivermouths, and bathymetric features where possible to create a natural look and preserve this valuable information. Most large inland bodies of water are not masked.

TerraColor global ocean mask
TerraColor global ocean mask (Geographic projection)

Using our proprietary ocean mask, we have created two standard versions of TerraColor: one with a uniform blue ocean fill and another with a bathymetric shaded relief image. For an additional fee, we can also create custom versions of TerraColor that fill any background color (i.e., a specific shade of blue) or image (such as your own bathymetric shaded relief) into the ocean areas. Please contact us for more information.

 

Western Iceland with ocean mask (left) and original (right)
Western Iceland with ocean mask (left) and original (right)

Paracel Islands, South China Sea with ocean mask (left) and original (right)
Paracel Islands, South China Sea with ocean mask (left) and original (right)

 

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