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GTOPO30

From Wikipedia, the free encyclopedia

GTOPO30 is a digital elevation model for the world, developed by United States Geological Survey (USGS). It has a 30-arc second resolution (approximately 1 km), [1] and is split into 33 tiles stored in the USGS DEM file format.

According to DTED and USGS DEM the absolute vertical accuracy of GTOP30 varies from ±30 meters.[2]

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Transcription

Gallery

This map is derived from GTOPO30 data that describes the elevation of Earth's terrain at intervals of 30 arcseconds (approximately 1 km). It uses hypsometric tints instead of contour lines to indicate elevation.

N60-90, W150-180
N60-90, W120-150
N60-90, W90-120
N60-90, W60-90
N60-90, W30-60
N60-90, W0-30
N60-90, E0-30
N60-90, E30-60
N60-90, E60-90
N60-90, E90-120
N60-90, E120-150
N60-90, E150-180
N30-60, W150-180
N30-60, W120-150
N30-60, W90-120
N30-60, W60-90
N30-60, W30-60
N30-60, W0-30
N30-60, E0-30
N30-60, E30-60
N30-60, E60-90
N30-60, E90-120
N30-60, E120-150
N30-60, E150-180
N0-30, W150-180
N0-30, W120-150
N0-30, W90-120
N0-30, W60-90
N0-30, W30-60
N0-60, W0-30
N0-60, E0-30
N0-60, E30-60
N0-60, E60-90
N0-60, E90-120
N0-60, E120-150
N0-60, E150-180
S0-30, W150-180
S0-30, W120-150
S0-30, W90-120
S0-30, W60-90
S0-30, W30-60
S0-30, W0-30
S0-30, E0-30
S0-30, E30-60
S0-30, E60-90
S0-30, E90-120
S0-30, E120-150
S0-30, E150-180
S30-60, W150
S30-60, W120
S30-60, W90-120
S30-60, W60-90
S30-60, W30-60
S30-60, W0-30
S30-60, E0-30
S30-60, E30-60
S30-60, E60-90
S30-60, E90-120
S30-60, E120-150
S30-60, E150-180
S60-90, W150-180
S60-90, W120-150
S60-90, W90-120
S60-90, W60-90
S60-90, W30-60
S60-90, W0-30
S60-90, E0-30
S60-90, E30-60
S60-90, E60-90
S60-90, E90-120
S60-90, E120-150
S60-90, E150-180
Each tile is available at a resolution of 1800 × 1800 pixels (approximate file size 1 MB, 60 pixels = 1 degree, 1 pixel = 1 minute)

See also

References

  1. ^ USGS EROS Archive - Digital Elevation - Global 30 Arc-Second Elevation (GTOPO30)
  2. ^ "Accuracy". Archived from the original on July 31, 2017. Retrieved July 26, 2017.

External links


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This page was last edited on 14 September 2023, at 21:28
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