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Centamap – launched in 1999, Centamap is built using data from the Hong Kong Government; GeoInfo Map [1] – a geospatial information service provided by the Hong Kong Special Administrative Region (HKSAR) Government.
OpenStreetMap was created by Steve Coast in response to the Ordnance Survey, the United Kingdom's national mapping agency, failing to release its data to the public under free licences in 2004. Initially, maps were created only via GPS traces , but it was quickly populated by importing public domain geographical data such as the U.S. TIGER and ...
Administrative areas in this database are countries and lower level subdivisions such as provinces, departments, bibhag, bundeslander, daerah istimewa, fivondronana, krong, landsvæðun, opština, sous-préfectures, counties, and thana. Crop Calendar Dataset: Raster data on planting dates and harvesting dates across the world for 19 crops.
These databases typically contain IP address data, which may be used in firewalls, ad servers, routing, mail systems, websites, and other automated systems where a geolocation may be useful. An alternative to hosting and querying a database is to obtain the country code for a given IP address through a DNSBL-style lookup from a remote server.
The foundation was formed in February 2006 to provide financial, organizational and legal support to the broader Libre/Free and open-source geospatial community. [2] It also serves as an independent legal entity to which community members can contribute code, funding and other resources.
Principles of geolocation using GPS. Geopositioning is the process of determining or estimating the geographic position of an object or a person. [1] Geopositioning yields a set of geographic coordinates (such as latitude and longitude) in a given map datum.
The W3C Geolocation API is also supported by Opera Mobile 10.1 – available for Android and Symbian devices (S60 generations 3 & 5) since 24 November 2010. [9] Browsers initially allowed access to the API in insecure contexts, but in the context of Secure Contexts, [ 10 ] browsers, e.g., Chrome, [ 11 ] now generally require a secure connection.
[19] In 2005, using WiFi databases for geolocation was being discussed, and WiGLE, with approximately 2.4 million located access points in the database, was often mentioned. [20] [21] [22] In 2017, data from WiGLE was used as a source for WiFi router locations and encryption frequencies. [23]