Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 27. Chapters: World file, Geography Markup Language, Shapefile, Geotagged photograph, Well-known text, Spatial Archive and Interchange Format, MrSID, Topologically Integrated Geographic Encoding and Referencing, Keyhole Markup Language, USGS DEM, ECW, Spatial database, Geodatabase, Geographic Data Files, SRID, GDAL, Digital line graph, Comparison of Vector Formats, Esri grid, MapInfo TAB format, Spatial data file, SOSI, Digital raster graphic, DTED, HHCode, LibLAS, NavPix, CityGML, AIXM, GeoTIFF, GeoSciML, Digital Geographic Exchange Standard, Dual Independent Map Encoding, MapInfo Interchange Format, Controlled Image Base, National Transfer Format, Spatial Data Transfer Standard, Vector Product Format, SpatiaLite. Excerpt: The Geography Markup Language (GML) is the XML grammar defined by the Open Geospatial Consortium (OGC) to express geographical features. GML serves as a modeling language for geographic systems as well as an open interchange format for geographic transactions on the Internet. Note that the concept of feature in GML is a very general one and includes not only conventional "vector" or discrete objects, but also coverages (see also GMLJP2) and sensor data. The ability to integrate all forms of geographic information is key to the utility of GML. GML contains a rich set of primitives which are used to build application specific schemas or application languages. These primitives include: The original GML model was based on the World Wide Web Consortium's Resource Description Framework (RDF). Subsequently, the OGC introduced XML schemas into GML's structure to help connect the various existing geographic databases, whose relational structure XML schemas more easily define. The resulting XML-schema-based GML retains many features of RDF, including the idea of child elements as properties of the parent object (RDFS) a...