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2. OpenStreetMap - Wikipedia

   en.wikipedia.org/wiki/OpenStreetMap

   OpenStreetMap ( OSM) is a free, open geographic database updated and maintained by a community of volunteers via open collaboration. Contributors collect data from surveys, trace from aerial imagery and also import from other freely licensed geodata sources. OpenStreetMap is freely licensed under the Open Database License and as a result ...

3. Harriet Tubman - Wikipedia

   en.wikipedia.org/wiki/Harriet_Tubman

   Harriet Tubman (born Araminta Ross, c. March 1822 [1] – March 10, 1913) was an American abolitionist and social activist. [2] [3] After escaping slavery, Tubman made some 13 missions to rescue approximately 70 enslaved people, including her family and friends, [4] using the network of antislavery activists and safe houses known collectively ...

4. NATO - Wikipedia

   en.wikipedia.org/wiki/NATO

   NATO was established on 4 April 1949 by the signing of the North Atlantic Treaty (Washington Treaty). The 12 founding members of the alliance were Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States. [126] Four new members joined during the Cold War: Greece ...

5. Google Earth - Wikipedia

   en.wikipedia.org/wiki/Google_Earth

   Google Earth. Google Earth is a computer program that renders a 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles. Users can explore the globe by entering ...

6. Thematic map - Wikipedia

   en.wikipedia.org/wiki/Thematic_map

   A very innovative thematic map from the 19th century. Isarithmic map of minimum temperature used as plant hardiness zones. A thematic map is a type of map that portrays the geographic pattern of a particular subject matter (theme) in a geographic area. This usually involves the use of map symbols to visualize selected properties of geographic ...

7. Area code 810 - Wikipedia

   en.wikipedia.org/wiki/Area_code_810

   Coordinates: 43.0°N 83.0°W. Map of Michigan, having numbering plan area 810 highlighted in green. Area code 810 is a telephone area code in the North American Numbering Plan for the east-central part in the U.S. state of Michigan. The numbering plan area (NPA) comprises the cities of Flint, Lapeer, Port Huron, and the southern portion of the ...