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Simple Features : ウィキペディア英語版
Simple Features

Simple Features (officially Simple Feature Access) is both an Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO) standard ISO 19125 that specifies a common storage and access model of mostly two-dimensional geographical data (point, line, polygon, multi-point, multi-line, etc.)
The ISO 19125 standard comes in two parts. Part one, ISO 19125-1 (SFA-CA for "common architecture"), defines a model for two-dimensional simple features, with linear interpolation between vertices. The data model defined in SFA-CA is a hierarchy of classes. This part also defines representation using Well-Known Text (and Binary). Part 2 of the standard, ISO 19125-2 (SFA-SQL), defines an implementation using SQL. The OpenGIS standard(s) cover implementations in CORBA and OLE/COM as well, although these have lagged behind the SQL one and are not standardized by ISO.
The ISO/IEC 13249-3 SQL/MM Spatial extends the Simple Features data model mainly with circular interpolations (e.g. circular arcs) and adds other features like coordinate transformations and methods for validating geometries as well as Geography Markup Language support.〔
== Standard documents ==

* ISO/IEC:
*
* (ISO 19125-1:2004 Geographic information -- Simple feature access -- Part 1: Common architecture )
*
* (ISO 19125-2:2004 Geographic information -- Simple feature access -- Part 2: SQL option )
* OpenGIS
*
* (OpenGIS Implementation Specification for Geographic information - Simple feature access - Part 1: Common architecture (05-126, 06-103r3, 06-103r4) ), current version 1.2.1
*
* (OpenGIS Simple Feature Access - Part 2: SQL Option (99-054, 05-134, 06-104r3, 06-104r4) ), current version 1.2.1, formerly OpenGIS Simple Features (Specification ) for SQL
*
* (OpenGIS Simple Features Implementation Specification for CORBA (99-054) ), current version 1.0
*
* (OpenGIS Simple Features Implementation Specification for OLE/COM (99-050) ), current version 1.1

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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