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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]
Map providers generally collect, aggregate and supply data in a well-defined and documented file format that is specifically intended for information interchange, e.g. Navteq uses Standard Interchange Format (SIF) [2] and GDF, while Tele Atlas uses a proprietary form of GDF. [3]
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 ...
GDF may refer to: Civic Democratic Forum (Građanski demokratski forum), a political party in Serbia; Gaz de France, a defunct French energy company; General Data Format for Biomedical Signals; Geographic Data Files; Geological disposal facility; Glasnost Defense Foundation, a Russian human rights organization; Global Development Finance, an ...
Map data vendors such as Tele Atlas and Navteq create the base map in a GDF (Geographic Data Files) format, but each electronics manufacturer compiles it in an optimized, usually proprietary manner. GDF is not a CD standard for car navigation systems. GDF is used and converted onto the CD-ROM in the internal format of the navigation system.
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
English: This diagram illustrates how GDF-5, a signaling protein, binds to the BMPR receptor on cell surfaces. This binding activates proteins, which regulate the expression of genes involved in bone and cartilage formation.