OGP Publication 373-7-2 – Surveying and Positioning Guidance Note number 7, part 2 – November 2010
To facilitate improvement, this document is subject to revision. The current version is available at www.epsg.org.
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Preface
The EPSG Geodetic Parameter Dataset, abbreviated to the EPSG Dataset, is a repository of parameters
required to:
• define a coordinate reference system (CRS) which ensures that coordinates describe position
unambiguously.
• define transformations and conversions that allow coordinates to be changed from one CRS to
another CRS. Transformations and conversions are collectively called coordinate operations.
The EPSG Dataset is maintained by the OGP Surveying and Positioning Committee’s Geodetic
Subcommittee. It conforms to ISO 19111 – Spatial referencing by coordinates. It is distributed in three
ways:
• the EPSG Registry, in full the EPSG Geodetic Parameter Registry, a web-based delivery platform
in which the data is held in GML using the CRS entities described in ISO 19136.
• the EPSG Database, in full the EPSG Geodetic Parameter Database, a relational database structure
where the entities which form the components of CRSs and coordinate operations are in separate
tables, distributed as an MS Access database;
• in a relational data model as SQL scripts which enable a user to create an Oracle, MySQL,
PostgreSQL or other relational database and populate that database with the EPSG Dataset;
OGP Surveying and Positioning Guidance Note 7 is a multi-part document for users of the EPSG Dataset.
• Part 0, Quick Start Guide, gives a basic overview of the Dataset and its use.
• Part 1, Using the Dataset, sets out detailed information about the Dataset and its content,
maintenance and terms of use.
• Part 2, Formulas, (this document), provides a detailed explanation of formulas necessary for
executing coordinate conversions and transformations using the coordinate operation methods
supported in the EPSG dataset. Geodetic parameters in the Dataset are consistent with these
formulas.
• Part 3, Registry Developer Guide, is primarily intended to assist computer application developers
who wish to use the API of the Registry to query and retrieve entities and attributes from the dataset.
• Part 4, Database Developer Guide, is primarily intended to assist computer application developers
who wish to use the Database or its relational data model to query and retrieve entities and attributes
from the dataset.
The complete text may be found at http://www.epsg.org/guides/index.html. The terms of use of the dataset
are also available at http://www.epsg.org/CurrentDB.html.
In addition to these documents, the Registry user interface contains online help and the Database user
interface includes context-sensitive help accessed by left-clicking on any label.
This Part 2 of the multipart Guidance Note is primarily intended to assist computer application developers in
using the coordinate operation methods supported by the EPSG Dataset. It may also be useful to other users
of the data.
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idea_yuye2013-09-08很好的资料，可惜自己英文太烂！
