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2. Google Earth - Wikipedia

   en.wikipedia.org/wiki/Google_Earth

   Google Earth is a web and 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.

3. Wikipedia:Obtaining geographic coordinates - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Obtaining...

   Center the screen on your location by double-clicking on it, then use the View in Google Maps button at the top (Google Earth 4.1 and newer). This will open Google Maps within Google Earth. You can see the center coordinates in decimal format in the address bar, but unfortunately you cannot copy them directly.

4. Public Land Survey System - Wikipedia

   en.wikipedia.org/wiki/Public_Land_Survey_System

   In the original Homestead Act of 1862, during the Lincoln administration, each settler was allocated 160 acres (0.65 km 2) of land, a quarter-section. Later amendments of the Homestead Act allocated more land, as much as 640 acres (2.6 km 2), a section. This was a good revision to apply to land that was drier or more desolate than the earlier ...

5. List of satellite map images with missing or unclear data

   en.wikipedia.org/wiki/List_of_satellite_map...

   Some locations on free, publicly viewable satellite map services have such issues due to having been intentionally digitally obscured or blurred for various reasons of this. [1] For example, Westchester County, New York asked Google to blur potential terrorism targets (such as an amusement park, a beach, and parking lots) from its satellite ...

6. Acre - Wikipedia

   en.wikipedia.org/wiki/Acre

   The acre is still a statutory measure in the United States. Both the international acre and the US survey acre are in use, but they differ by only four parts per million (see below). The most common use of the acre is to measure tracts of land. The acre is used in many established and former Commonwealth of Nations countries by

7. List of free geology software - Wikipedia

   en.wikipedia.org/wiki/List_of_free_geology_software

   This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.

8. Texas land survey system - Wikipedia

   en.wikipedia.org/wiki/Texas_land_survey_system

   "A league and a labor" (4,605.5 acres; 18.638 km 2) was a common first land grant [4] and consisted of a league of land away from the river plus one extra labor of good riparian (river-situated) land. A headright of this much land was granted to "all persons [heads of families] except Africans and their descendants and Indians living in Texas ...

9. Tree crown measurement - Wikipedia

   en.wikipedia.org/wiki/Tree_crown_measurement

   Google Earth itself includes a ruler tool that can be used to measure diameters or spokes across the crown of the tree. Alternatively, the crown area can be measured and crown spread calculated from that value. EasyAcreage [8] is a Google Earth area measurement tool that calculates the area of any shape outlined on the Google Earth display. The ...