Data:Global Topography: Difference between revisions

Latest revision as of 09:30, 22 July 2015

Global Topography dataset information page

Short Description

Bathymetry and topography of the world

Statement: Global estimated bathymetric and integrated bathy-topo relief models; 1 minute (~2 km) and 30 arc-second (~1 km) cell sizes

Abstract: Global ocean bathymetry estimated from sea-surface satellite altimetry (Geosat and ERS-1) measurements and constrained by ship depth measurements.

Data format

Data type:	Topography
Data origin:	Modeled
Data format:	GeoTIFF, ASCII
Other format:	GMT/Postscript
Data resolution:	1 arc-minute (~2 km) and 30 arc-second (~1 km) cell sizes (horizontal)
Datum:	WGS 84 geographic (horizontal); sea level (vertical)

Data Coverage

Spatial data coverage: Global (72N to 72S)
Temporal data coverage: Time averaged
Time period covered:

Availability

Download data: http://topex.ucsd.edu/WWW html/mar topo.html
Data source: http://topex.ucsd.edu/WWW html/mar topo.html

References

Smith, W. H. F., and D. T. Sandwell, Global seafloor topography from satellite altimetry and ship depth soundings, Science, v. 277, p. 1957-1962, 26 Sept., 1997.

@@ Line 1: / Line 1: @@
 {{Data description
-|One-line data description=Global Map of Sea Floor Topography Based on Satellite Altimetry & Ship Depth Soundings
+|One-line data description=Global estimated bathymetric and integrated bathy-topo relief models; 1 minute (~2 km) and 30 arc-second (~1 km) cell sizes
-|Extended data description=The presented global ocean bathymetry map is the most complete, high-resolution image of sea floor topography currently available (1997). The map was constructed by blending depth soundings collected from ships with detailed gravity anomaly information obtained from the  Geosat and  ERS-1 satellite altimetry missions. This combination of data yields a globally uniform level of resolution ideal for displaying major tectonic features, such as mid-ocean spreading ridges or fracture zones.
+|Extended data description=Global ocean bathymetry estimated from sea-surface satellite altimetry (Geosat and ERS-1) measurements and constrained by ship depth measurements.
 |Upload image dataset=Global topography.png
-|Caption dataset image=Topography of the world
+|Caption dataset image=Bathymetry and topography of the world
 }}
 {{Data format
@@ Line 9: / Line 9: @@
 |Data origin=Modeled
 |Data format=GeoTIFF, ASCII
-|Other data format=GTM/Postscript
+|Other data format=GMT/Postscript
-|Data resolution=1minute
+|Data resolution=1 arc-minute (~2 km) and 30 arc-second (~1 km) cell sizes (horizontal)
+|Data projection=WGS 84 geographic (horizontal); sea level (vertical)
 }}
 {{Dataset coverage
 |Data spatial coverage=Global (72N to 72S)
-|Data temporal coverage=Time snap shot
+|Data temporal coverage=Time averaged
 }}
 {{Dataset availability