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2. Topologically Integrated Geographic Encoding and Referencing

   en.wikipedia.org/wiki/Topologically_Integrated...

   TIGER data published through February 2007 (2006 Second Edition) were in a custom text-based format formally known as TIGER/Line files. In 2008, data in shapefile format was published. Please note that shapefiles are not topological, therefore may create slivers when comparing TIGER/Line boundaries.

3. Comparison of GIS vector file formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_GIS_vector...

   National Transfer Format (NTF) – National Transfer Format (mostly used by the UK Ordnance Survey) Shapefile – open, hybrid vector data format using SHP, SHX and DBF files (by ESRI) Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk) TIGER – Topologically Integrated Geographic Encoding and Referencing

4. GeoJSON - Wikipedia

   en.wikipedia.org/wiki/GeoJSON

   GeoJSON [1] is an open standard format designed for representing simple geographical features, along with their non-spatial attributes.It is based on the JSON format.. The features include points (therefore addresses and locations), line strings (therefore streets, highways and boundaries), polygons (countries, provinces, tracts of land), and multi-part collections of these types.

5. Data model (GIS) - Wikipedia

   en.wikipedia.org/wiki/Data_model_(GIS)

   For example, the field is a generic conceptual model of geographic phenomena, the relational database model and vector are generic logical models, while the shapefile format is a generic physical model. These models are typically implemented directly info software and GIS file formats.

6. GIS file format - Wikipedia

   en.wikipedia.org/wiki/GIS_file_format

   An open format that has become one of the most common formats for data sharing. IMG – ERDAS IMAGINE image file format; JPEG2000 – Open-source raster format. A compressed format, allows both lossy and lossless compression. MrSID – Multi-Resolution Seamless Image Database (by Lizardtech). A compressed wavelet format, allows both lossy and ...

7. Geospatial PDF - Wikipedia

   en.wikipedia.org/wiki/Geospatial_PDF

   The PDF format is widely accepted and is considered the de facto standard for printable documents on the web. This means that users do not require the any proprietary plug-in to read geospatial PDFs created following the PDF 1.7 specification, which was published as ISO 32000-1 standard . [ 3 ]