Категория:Эмпирические данные про рельеф Земли: различия между версиями
Строка 18: | Строка 18: | ||
* Wikidata has 'river mouth', 'river source' coordinates | * Wikidata has 'river mouth', 'river source' coordinates | ||
* [[mw:Extension:Maps]] gives middle coordinates by geocoding | * [[mw:Extension:Maps]] gives middle coordinates by geocoding | ||
− | * [http://pinedesk.a.willowdesk.info/project/rivers/ World Rivers visualization] on basis of [[Natural Earth]] | + | * [http://pinedesk.a.willowdesk.info/project/rivers/ World Rivers visualization] on basis of [[aw:Natural Earth]] |
** [http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_lakes.zip lakes with rivers good] | ** [http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_lakes.zip lakes with rivers good] | ||
* [https://commons.wikimedia.org/wiki/File:Cilician_Armenia-fr.svg Sources... Rivers : Demis] | * [https://commons.wikimedia.org/wiki/File:Cilician_Armenia-fr.svg Sources... Rivers : Demis] | ||
* [https://github.com/simonepri/geo-maps/blob/master/info/earth-rivers.md we first download the simplified shapefile of rivers polygons from the OpenStreetMapData page] - poor data but good idea | * [https://github.com/simonepri/geo-maps/blob/master/info/earth-rivers.md we first download the simplified shapefile of rivers polygons from the OpenStreetMapData page] - poor data but good idea |
Версия 12:31, 17 апреля 2018
Geoid and Mean sea level differences[править]
In aviation, the ellipsoid known as World Geodetic System 84 is increasingly used to define heights; however, differences up to 100 metres (328 feet) exist between this ellipsoid height and mean tidal height. The alternative is to use a geoid-based vertical datum such as NAVD88... The location-dependent, but persistent in time, separation between mean sea level and the geoid is referred to as (stationary) ocean surface topography. It varies globally in a range of ± 2 m.
Data[править]
free terrain data for anywhere in the world
aw: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
Elevation data[править]
rivers[править]
реки в русской википедии имеют данные про водоток (исток, устье); расположение (притоки, населенные пункты)
- Wikidata has 'river mouth', 'river source' coordinates
- mw:Extension:Maps gives middle coordinates by geocoding
- World Rivers visualization on basis of aw:Natural Earth
- Sources... Rivers : Demis
- we first download the simplified shapefile of rivers polygons from the OpenStreetMapData page - poor data but good idea
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