spatial types
DESCRIPTION
Spatial Types. Point Data. Sparse Point Data. Dense Point Data. Gridded Data. MODIS CMG - Coverage. SSM/I Ease-grid. SSM/I EASE Grid - Coverage. Polar Stereo (Sea Ice). Polar Stereo (Sea Ice) - Coverage. Polar Stereo (Sea Ice) - Coverage. Polar Stereo (Sea Ice) - Coverage. - PowerPoint PPT PresentationTRANSCRIPT
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Fall, 2004 National Snow and Ice Data Center 1
Spatial Types
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Fall, 2004 National Snow and Ice Data Center 2
Point Data
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Fall, 2004 National Snow and Ice Data Center 3
Sparse Point Data
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Fall, 2004 National Snow and Ice Data Center 4
Dense Point Data
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Fall, 2004 National Snow and Ice Data Center 5
Gridded Data
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Fall, 2004 National Snow and Ice Data Center 6
MODIS CMG - Coverage
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Fall, 2004 National Snow and Ice Data Center 7
SSM/I Ease-grid
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Fall, 2004 National Snow and Ice Data Center 8
SSM/I EASE Grid - Coverage
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Fall, 2004 National Snow and Ice Data Center 9
Polar Stereo (Sea Ice)
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Fall, 2004 National Snow and Ice Data Center 10
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 11
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 12
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 13
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 14
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 15
Polar Stereo (Sea Ice) - Coverage
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Fall, 2004 National Snow and Ice Data Center 16
Tiles
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Fall, 2004 National Snow and Ice Data Center 17
05v08h Coverage
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Fall, 2004 National Snow and Ice Data Center 18
05v08h w/ lat/lon bounding box
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05v08h Spherical
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Fall, 2004 National Snow and Ice Data Center 20
AVHRR L1b (Scene)
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Fall, 2004 National Snow and Ice Data Center 21
AVHRR L1b (Scene) - Coverage
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Fall, 2004 National Snow and Ice Data Center 22
AVHRR L1b (Scene) - Coverage
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Fall, 2004 National Snow and Ice Data Center 23
AVHRR L1b (Scene) - Coverage
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Fall, 2004 National Snow and Ice Data Center 24
AVHRR L1b (Scene) - Coverage
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Fall, 2004 National Snow and Ice Data Center 25
AVHRR L1b (Scene) - Coverage
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Fall, 2004 National Snow and Ice Data Center 26
Weird Shape
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Fall, 2004 National Snow and Ice Data Center 27
Full Orbit - Coverage
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Fall, 2004 National Snow and Ice Data Center 28
Full Orbit - LLBox
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Fall, 2004 National Snow and Ice Data Center 29
Full Orbit – Lat/lon Blocks
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Fall, 2004 National Snow and Ice Data Center 30
Full Orbit – Spherical Blocks
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Fall, 2004 National Snow and Ice Data Center 31
Full Orbit - Coverage
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Fall, 2004 National Snow and Ice Data Center 32
Full Orbit - Coverage
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Fall, 2004 National Snow and Ice Data Center 33
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.