Aster instrument of the Terra satellite is also freely available for 99% of the globe, and represents elevation at 30 meter resolution... When land topography and bathymetry is combined, a truly Global Relief Model is obtained... ALOS provides since 2016 a global 1-arc second DSM free of charge... OpenTopography is a community access resource of high-resolution

http://www.opendem.info

Earth2014[править]

The Earth2014 global topography and relief model [17] provides layered topography grids at 1 arc-minute resolution. Other than #SRTM30plus, #Earth2014 provides information on ice-sheet heights and bedrock (that is, topography below the ice) over Antarctica and Greenland

Earth2014 provides five different layers of height data, comprising Earth’s surface (lower interface of the atmosphere), topography and bathymetry of the oceans and major lakes, topography, bathymetry and bedrock, ice-sheet thicknesses and rock-equivalent topography. The Earth2014 global grids are provided as heights relative to the mean sea level

SRTM30plus[править]

2014

The SRTM30Plus dataset (used in NASA World Wind) attempts to combine GTOPO30, SRTM and bathymetric data to produce a truly global elevation model.

combined bathymetry and topography model .. the 30_PLUS version offers 0.5 arc-min (900 m) resolution. The bathymetric data in SRTM30_PLUS stems from depth soundings (SONAR) and from satellite altimetry... Over land areas, SRTM30 data from the USGS is included. SRTM30_PLUS provides background information for Google Earth and Google Maps.

Ground heights[править]

• by USGS in SRTMv4 - 90m, in SRTM DLR - 25m.
  • contours
• by Aster

Sea depths[править]

To map some 140 million square miles of sea floor, the Seabed 2030 project is currently recruiting around 100 ships that will circumscribe the globe for 13 years. The team, united under the non-profit group General Bathymetric Chart of the Oceans (GEBCO)

Seafloor gravity maps[править]

Global Map of Marine Gravity

Explore The World's Most Detailed Map Of The Seafloor, Released Today Robbie Gonzalez 10/03/14 8:00p

super-detailed map of the ocean floor’s topography is based on satellite measurements of subtle lumps on the ocean’s surface. These lumps of water, which are subtle, low, and wide on the ocean’s surface, are caused by the gravitational pull of underwater features like mountains and ridges. The team of scientists wrapped their data around a globe built with the Javascript library Cesium

from Google[править]

Introduced in Google Earth 5.0 in 2009, the Google Ocean feature allows users to zoom below the surface of the ocean and view the 3D bathymetry. Supporting over 20 content layers, it contains information from leading scientists and oceanographers... In June 2011, Google increased the resolution of some deep ocean floor areas from 1-kilometer grids to 100 meters.[27] The high-resolution features were developed by oceanographers at Columbia University's Lamont-Doherty Earth Observatory from scientific data collected on research cruises.

shelfs[править]

• Ngdc

  https://maps.ngdc.noaa.gov/viewers/bathymetry/ has 10 m depth contours from GEBCO_2014!!!

  • from http://www.ngdc.noaa.gov/mgg/image/2minrelief.html

• USGS explorer shows shelfs with Google watermark.

• Map of the Norwegian continental shelf - visual horizontals at 100м, 200м, 300м

some regions[править]

A 1.4-Billion-Pixel Map of the Gulf of Mexico Seafloor