The Open Data Institute (ODI) is a UK-based organisation that promotes the use of open data.
The Open Geospatial Consortium (OGC) is an international body that develops standards for geospatial data and technology.
The Open Government Licence (OGL) is a licence that allows the free use and reuse of government-produced data and information.
An open specification is a document that specifies the requirements for a product or service, without prescribing a particular solution.
An open standard is a specification or protocol that is publicly available and has been agreed upon by a consensus of stakeholders.
The Ordnance Survey (OS) is the national mapping agency of Great Britain.
An orthoimage is a remotely-sensed image that has been geometrically corrected so that it is free from distortion.
Orthorectification is the process of correcting an image so that it is free from distortion.
Information that can be used to identify a specific individual, such as a name, address, Social Security number, or date of birth.
The art, science, and technology of accurately determining the geometric properties of objects from photographs, usually from aerial photographs.