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2. OpenStreetMap - Wikipedia

   en.wikipedia.org/wiki/OpenStreetMap

   OpenStreetMap (abbreviated OSM) is a free, open map database updated and maintained by a community of volunteers via open collaboration. [4] Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and import from other freely licensed geodata sources.

3. List of GIS data sources - Wikipedia

   en.wikipedia.org/wiki/List_of_GIS_data_sources

   Government ArcGIS server addresses: Curated list of 3,500+ ArcGIS server addresses from federal to local. Updated once per week. Bad links fixed or flagged. NOAA Big Data Project: NOAA generates tens of terabytes of data a day from satellites, radars, ships, weather models, and other sources. While these data are publicly available, it is ...

4. Google Earth - Wikipedia

   en.wikipedia.org/wiki/Google_Earth

   The Google Earth API was a free beta service, allowing users to place a version of Google Earth into web pages. The API enabled sophisticated 3D map applications to be built. [ 85 ] At its unveiling at Google's 2008 I/O developer conference, the company showcased potential applications such as a game where the player controlled a milktruck atop ...

5. How NC insurers use drone, satellite photos to drop home ...

   www.aol.com/nc-insurers-drone-satellite-photos...

   The three-page report included an “orthogonal” aerial image from May 5, 2023, concluding the roof was in “poor condition” with “minor discoloration and streaking,” but “no defects or ...

6. Nearmap - Wikipedia

   en.wikipedia.org/wiki/Nearmap

   Vertical imagery is also known as orthorectified, providing a top-down view of the ground captured at a 90° angle. Orthorectification is a process used to correct the terrain distortion in aerial or satellite images that results from variations in the surface of the Earth and tilt of the satellite or aerial sensor being used to collect the data.

7. Geopositioning - Wikipedia

   en.wikipedia.org/wiki/Geopositioning

   Geopositioning uses various visual and electronic methods including position lines and position circles, celestial navigation, radio navigation, radio and WiFi positioning systems, and the use of satellite navigation systems. The calculation requires measurements or observations of distances or angles to reference points whose positions are known.