Fall, 2004 National Snow and Ice Dat a Center 1 Spatial Types
May 24, 2015
Fall, 2004 National Snow and Ice Data Center 1
Spatial Types
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Point Data
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Sparse Point Data
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Dense Point Data
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Gridded Data
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MODIS CMG - Coverage
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SSM/I Ease-grid
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SSM/I EASE Grid - Coverage
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Polar Stereo (Sea Ice)
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Polar Stereo (Sea Ice) - Coverage
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Polar Stereo (Sea Ice) - Coverage
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Polar Stereo (Sea Ice) - Coverage
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Polar Stereo (Sea Ice) - Coverage
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Polar Stereo (Sea Ice) - Coverage
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Polar Stereo (Sea Ice) - Coverage
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Tiles
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05v08h Coverage
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05v08h w/ lat/lon bounding box
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05v08h Spherical
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AVHRR L1b (Scene)
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AVHRR L1b (Scene) - Coverage
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AVHRR L1b (Scene) - Coverage
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AVHRR L1b (Scene) - Coverage
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AVHRR L1b (Scene) - Coverage
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AVHRR L1b (Scene) - Coverage
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Weird Shape
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Full Orbit - Coverage
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Full Orbit - LLBox
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Full Orbit – Lat/lon Blocks
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Full Orbit – Spherical Blocks
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Full Orbit - Coverage
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Full Orbit - Coverage
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Full Orbit – Using Backtrack
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Summary
Point Data: use points or multi-points.
Grids: Use a lat/lon bounding box if appropriate, otherwise use a spherical n-gon. Accuracy is more important than speed.
Tiled Data: A form of regional grid, use a lookup table.
Scenes: Use a spherical quadrilateral, maybe up to a spherical decagon for larger scenes. Speed is more important than accuracy.
Orbits: The best way to define the coverage of an orbit is to define the orbit. The best way to search for orbital data is to search orbits. Use Backtrack.