Abstract Specifications

The OGC Technical Committee (TC) has developed an architecture in support of its vision of geospatial technology and data interoperability called the OGC Abstract Specification. The Abstract Specification provides the conceptual foundation for most OGC specification development activities. Open interfaces and protocols are built and referenced against the Abstract Specification, thus enabling interoperability between different brands and different kinds of spatial processing systems. The Abstract Specification provides a reference model for the development of OGC Implementation Standards.
Document Title (click to view/download)OGC Doc.# Editor Publication Date
Abstract Specification Topic 21 - Discrete Global Grid Systems - Part 1 Core Reference system and Operations and Equal Area Earth Reference System  20-040r3  Robert Gibb 2021
This Abstract Specification lays the foundations for Discrete Global Grid Systems (DGGS). It defines Common classes for spatio-temporal geometry, topology, and reference systems using identifiers, a DGGS Core Reference system as a reference system using zonal identifiers with structured geometry that may be spatio-temporal, a suite of DGGS Core Functions, and it specifies Equal-Area Earth DGGS. The OGC DGGS Abstract Specification supports the specification of standardized DGGS infrastructures that enable the integrated analysis of very large, multi-source, multi-resolution, multi-dimensional, distributed geospatial data. Interoperability between OGC DGGS implementations is anticipated through implementation standards, and extension interface encodings of OGC Web Services.

Topic 0 - Overview  04-084r4  George Percivall 2020
This document (Topic 0) is an overview of the OGC Abstract Specification.

Topic 1 - Features and geometry – Part 1: Feature models  17-087r13  John R. Herring 2020
The Implementation Standard "Features and geometry – Part 1: Feature models" describes how geographic information in datasets and databases using a "feature model" are structured, created, stored, queried and manipulated. URLs in this document are identifiers of structural elements of a standard, such as requirements, tests, requirement classes, and conformances test suites.

Topic 2 - Referencing by coordinates Corrigendum  18-005r5  Roger Lott 2021
This document is identical in normative content with the latest edition (2019) of ISO 19111, Geographic Information - Spatial referencing by coordinates [ISO 19111:2019].

Topic 3 - Locational Geometry Structures  99-103  Cliff Kottman 1999
Provides essential and abstract models for GIS technology that is widely used.

Topic 4 - Stored Functions and Interpolation  99-104  Cliff Kottman 1999
This Topic Volume provides essential and abstract models for technology that is used widely across the GIS landscape. Its first heavy use is expected to occur in support of Coverage specifications (see Topic 6, The Coverage Type).

Topic 5 - Features  08-126  Cliff Kottman and Carl Reed 2009
From ISO 19101, “A feature is an abstraction of a real world phenomenon”; it is a geographic feature if it is associated with a location relative to the Earth.

Topic 6 - Schema for coverage geometry and functions  07-011  OGC 2007
This International Standard defines a conceptual schema for the spatial characteristics of coverages. Coverages support mapping from a spatial, temporal or spatiotemporal domain to feature attribute values where feature attribute types are common to all geographic positions within the domain. A coverage domain consists of a collection of direct positions in a coordinate space that may be defined in terms of up to three spatial dimensions as well as a temporal dimension.

Topic 7 - Earth Imagery  04-107  George Percivall 2004
Replaced previous material in Topic 7 with ISO 19101-2, Reference Model - Geographic Information - Imagery. Version 5 of OGC Topic 7 is identical with ISO 19101-2 Working Draft #3. Topic 7 will be updated jointly with the progress of ISO 19191-2. Appendix A of Topic 7, version 4 contained a "White Paper on Earth Image Geometry Models." That white paper is now separate OGC Recommendation document.

Topic 8 - Relationships Between Features  99-108r2  Cliff Kottman 1999
This Topic introduces an abstraction for the relationships between entities in the real world. This abstraction is modeled as relationships between the features introduced in Topic 5.

Topic 10 - Feature Collections  99-110  Cliff Kottman 1999
An OpenGIS Feature Collection is an abstract object consisting of Feature Instances, their Feature Schema, and Project Schema.

Topic 11 - Metadata  11-111r1  ISO 2016
Same as ISO 19115-1:2014. Abstract Specification Topic 11 was updated to the latest version of the ISO metadata standard on 21 September 2016. Prior to this date, this Topic was the same as ISO 19115:2003. Please note that many OGC standards and other related work normatively refer to the previous version of this Topic.

Topic 12 - The OpenGIS Service Architecture  02-112  ISO 2001
Same as ISO 19119

Topic 13 - Catalog Services  99-113  Cliff Kottman 1999
Covers the Geospatial Information Access Services

Topic 14 - Semantics and Information Communities  99-114  Cliff Kottman 1999
The OpenGIS notion of Information Communities was devised to enable groups such as ecologists and civil engineers to efficiently manage the semantics (or feature schema mismatches) of their own geodata collections and get maximum benefit from each other's geodata collections, despite semantic differences.

Topic 15 - Image Exploitation Services  00-115  Cliff Kottman, Arliss Whiteside 2000
Describes the categories and taxonomy of image exploitation services needed to support the use of images and certain related coverage types.

Topic 16 - Image Coordinate Transformation Services  00-116  Cliff Kottman, Arliss Whiteside 2000
Covers image coordinate conversion services.

Topic 17 - Location Based Mobile Services  00-117  Cliff Kottman 2000
Draft Abstract Spec for Location Based Services. Never formally adopted

Topic 18 - Geospatial Digital Rights Management Reference Model (GeoDRM RM)  06-004r4  Graham Vowles 2007
This document is a reference model for digital rights management (DRM) functionality for geospatial resources (GeoDRM). As such, it is connected to the general DRM market in that geospatial resources must be treated as nearly as possible like other digital resources, such as music, text, or services. It is not the intention here to reinvent a market that already exists and is thriving, but to make sure that a larger market has access to geospatial resources through a mechanism that it understands and that is similar to the ones already in use.

Topic 19 - Geographic information - Linear referencing  10-030  Paul Scarponcini 2012
Same as ISO IS 19148: 2012. Download at http://www.iso.org

Topic 20 - Observations and Measurements  10-004r3  Simon Cox 2013
This International Standard defines a conceptual schema for observations, and for features involved in sampling when making observations. These provide models for the exchange of information describing observation acts and their results, both within and between different scientific and technical communities. Observations commonly involve sampling of an ultimate feature of interest. This International Standard defines a common set of sampling feature types classified primarily by topological dimension, as well as samples for ex-situ observations. The schema includes relationships between sampling features (sub-sampling, derived samples). This International Standard concerns only externally visible interfaces and places no restriction on the underlying implementations other than what is needed to satisfy the interface specifications in the actual situation.

Topic 22 - Core Tiling Conceptual and Logical Models for 2D Euclidean Space  19-014r3  Carl Reed 2020
This OGC Abstract Specification (AS) defines: A conceptual model for tiling space in any dimension and; A logical model for 2D tiled structures and by extension tiling. The logical model is based on the conceptual model. The conceptual model specified in this Abstract Specification could be a sub-class in a more comprehensive Spatial Partitioning Conceptual Model. Additional Parts may be added to this AS for other dimensions, such as 3D, or other uses cases.

Topic Domain 1 - Telecommunications Domain  01-042  Tom Strickland 2001
Domain Model for telecommunications Networks