All articles starting with G
18,970 articles
Geography of Yemen
Geography of Yemen: physical geography of the Republic of Yemen, south-western Arabian Peninsula. Coastal plains, Yemen Mountain Massif to 3,760 m, eastern plateau, Ramlat as Sabatayn desert, Socotra; arid climate, severe water scarcity.
GeoGuessr
GeoGuessr: browser geography game created April 2013 by Anton Wallén, using Google Street View; five rounds, 5,000 points each, 25,000 max; freemium until February 2024, now subscription; annual World Championship esports event.
GeoGuessr World Championship
GeoGuessr World Championship: the annual world tournament for the Street View guessing game, run by GeoGuessr AB since 2023 (first two editions in Stockholm as the World Cup, 2025 Copenhagen, 2026 Berlin; champions Consus, Blinky, Radu C, Debre).
Geohash
Geohash: public-domain geocode system by Gustavo Niemeyer (2008) encoding latitude/longitude into hierarchical Base32 strings for spatial indexing and proximity search; compared with S2 and H3.
Geoid
The geoid is the equipotential surface of Earth's gravity field that best fits global mean sea level; it is irregular, undulating above and below a reference ellipsoid.
Geoinformatics
Geoinformatics is the science and technology dealing with the structure, capture, storage, processing, and dissemination of spatial information, resting on Geographic Information Systems and remote sensing, with applications from urban planning to disaster response.
Geoje
Geoje (거제; 巨濟) is a city in South Gyeongsang Province, South Korea, on Geoje Island; a shipbuilding center hosting Hanwha Ocean and Samsung Heavy Industries yards, with 228,629 residents (September 2026) and a history from Byeonhan's Dokro-guk through the 1592 Battle of Okpo.
Geoje Sea World
Geoje Sea World (거제씨월드), opened April 2014 on Geoje Island, South Gyeongsang, is Korea's largest dolphin and beluga experience park, owned by Goldsea Korea Investment, marked by welfare controversies, 2024 dolphin deaths, and a 2025 suspension review.
GeoJSON
GeoJSON is a format for encoding geographic data structures in JSON, where an object represents a geometry, a feature, or a feature collection, standardized as RFC 7946 in 2016.
Geolocation API
The Geolocation API is a W3C-standardized web interface through which a browser exposes a device's geographic position to a web page after the user grants permission.
Geolocation database
A geolocation database is a centralized service telling unlicensed wireless devices which frequencies they may use at their location; the FCC mandated it for TV white space devices in 2010.
Geologic hazard
A geologic hazard is a natural hazard of geological origin, such as an earthquake, landslide, volcano, or sinkhole, that can cause loss of life or property damage.
Geologic hydrogen
Geologic hydrogen, also called natural, native, white, or gold hydrogen, is hydrogen formed underground by natural processes, first produced commercially at Bourakébougou, Mali, after 1987.
Geologic map
A geologic map is a map showing the distribution of rock and sediment units at the Earth's surface, with colors and symbols marking units of different age, composition, and origin.
Geologic map of Reull Vallis
The geologic map of Reull Vallis, USGS Scientific Investigations Map 3245 by Mest and Crown, was published in 2014 and covers eastern Promethei Terra on Mars.
Geologic modeling
Geologic modeling is the construction of digital 3D representations of the Earth's subsurface using explicit or implicit methods, allowing estimation of properties like permeability at any point.
Geologic temperature record
The geologic temperature record reconstructs past surface and water temperatures from physical, chemical, and biological proxies in rocks, sediments, and ice, reaching back millions of years before thermometers.
Geologic time scale
The geologic time scale divides Earth's roughly 4.6-billion-year history into eons, eras, periods, epochs, and ages, with boundaries set by the International Commission on Stratigraphy and dated radiometrically.
Geological CO2 storage
Geological CO2 storage is the disposal stage of carbon capture and storage, placing captured CO2 in deep porous rock formations such as saline aquifers and depleted oil and gas fields.
Geological Disposal Facility (United Kingdom)
The Geological Disposal Facility is the United Kingdom's planned facility for permanently disposing of its most hazardous radioactive waste in vaults 200 to 1,000 meters underground.
Geological formation
A geological formation, also called a stratigraphic formation, is the primary formal unit of lithostratigraphy: a rock body defined by lithology and mappable, ranking below group and above member.
Geological heritage
Geological heritage, or geoheritage, is the set of rocks, minerals, fossils, soils, landforms, and landscapes with scientific, educational, cultural, or aesthetic value, conserved through geoconservation at sites called geosites.
Geological Magazine
Geological Magazine is a British peer-reviewed geology journal founded in 1864 by Henry Woodward and published by Cambridge University Press, one of the oldest continuously published Earth science periodicals.
Geological map
A geological map, also called a geologic map, shows where rock units, surficial deposits, and structures such as faults and folds lie at or beneath the surface.
Geological modelling
Geological modeling is the construction of a 3D numerical representation of the subsurface, used mainly in petroleum geology to estimate resources and plan oil and gas field development.
Geological Phenomena
Geological phenomena are structures, properties, and processes involving Earth's inanimate matter (MeSH D055593): earthquakes, volcanic eruptions, landslides, tsunamis, erosion, and plate tectonics, studied for hazard forecasting.
Geological Society of America
The Geological Society of America, founded in 1888 and headquartered in Boulder, Colorado, supports geoscientists in more than 100 countries through meetings, publications, and grants.
Geological Society of London
The Geological Society of London, founded in 1807, is the world's oldest geological society and the UK's professional body for geoscience, based at Burlington House, Piccadilly.
Geological strength index
The geological strength index (GSI) is a rock mass characterization system developed by Evert Hoek in 1994, estimating strength of jointed rock masses for tunnel, slope, and foundation design.
Geological survey
A geological survey is a systematic inventory of a territory's rocks, sediments, water, and mineral resources, carried out by a public organization such as the USGS.