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Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...
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Download QR code; In other projects ... You are free: to share – to copy, ... African and Asian continents separated: 03:53, 31 May 2006 ...
The main drainage of the continent is to the north and west, or towards the basin of the Atlantic Ocean. [1] To the main African rivers belong: Nile (the longest river of Africa), Congo (river with the highest water discharge on the continent) and the Niger, which flows half of its length through the arid areas.
[2] Although it is a public database, GADM has a higher spatial resolution than other free databases, [3] and also higher than commercial software such as ArcGIS. [4] Those sources are commonly use to complete data analysis with data visualisation such as data plots , choropleth map , etc. [ 5 ] [ 6 ]
The list of national coordinate reference systems (CRS) lists map projections officially recommended for existing countries.Given that every projection gives deformations, each country's needs are different in order to reduce these distortions.
Africa is the world's second-largest and second-most populous continent after Asia.At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area. [9]
Download QR code; Print/export ... Location of Africa on the world map Satellite map of Africa ... Free knowledge base. Wikinews Free-content news.