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Geographic Data Files (GDF) is an interchange file format for geographic data. In contrast with generic GIS formats , GDF provides detailed rules for data capture and representation, and an extensive catalog of standard features, attributes and relationships.
The original GDF specification was introduced in 2005 as a new data format to overcome some of the limitations of the European Data Format for Biosignals (EDF). GDF was also designed to unify a number of file formats which had been designed for very specific applications (for example, in ECG research and EEG analysis). [2]
Vector data can be displayed as vector graphics used on traditional maps, whereas raster data will appear as an image that may have a blocky appearance for object boundaries. (depending on the resolution of the raster file). Vector data can be easier to register, scale, and re-project, which can simplify combining vector layers from different ...
.nii – single-file (combined data and meta-data) style.nii.gz – gzip-compressed, used transparently by some software, notably the FMRIB Software Library (FSL).gii – single-file (combined data and meta-data) style; NIfTI offspring for brain surface data.img, .hdr – dual-file (separate data and meta-data, respectively) style
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The OGC GeoPackage standard specifies a set of OGC member approved extensions in Annex F. Additional (vendor-specific) extensions may also be added by following the rules for GeoPackage extensions, however doing so can impact interoperability. GeoPackage was designed to be as lightweight as possible and be contained in one ready-to-use single file.
Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk) TIGER – Topologically Integrated Geographic Encoding and Referencing Vector Product Format – National Geospatial-Intelligence Agency (NGA)'s format of vectored data for large geographic databases
Galdos demonstrated an early map style engine pulling data from an Oracle-based "GML" data server (precursor of the WFS) at the first OGC Web Map Test Bed in September 1999. In October 1999, Galdos Systems rewrote the SFXML draft document into a Request for Comment, and changed the name of the language to GML (Geography Markup Language).