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OGC Discrete Global Grid Systems 全球离散网格系统 （修订版）
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This document specifies the core Abstract Specification and extension mechanisms for Discrete Global Grid Systems (DGGS). A DGGS is a spatial reference system that uses a hierarchical tessellation of cells to partition and address the globe.
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Copyright © 2016 Open Geospatial Consortium
Open Geospatial Consortium
Submission Date: 2015-09-30
Approval Date: <yyyy-dd-mm>
Publication Date: <yyyy-dd-mm>
External identifier of this OGC
®
document: <http://www.opengis.net/doc/IS/DGGS/1.0>
Internal reference number of this OGC
®
document: 15-104r4
Version: 1.0.0
Category: OGC
®
Abstract Specification
Editor: Matthew Purss
Topic 21: Discrete Global Grid Systems Abstract
Specification
Copyright notice
Copyright © 2016 Open Geospatial Consortium
To obtain additional rights of use, visit http://www.opengeospatial.org/legal/.
Warning
This document is not an OGC Standard. This document is distributed for review and
comment. This document is subject to change without notice and may not be referred to
as an OGC Standard.
Recipients of this document are invited to submit, with their comments, notification of
any relevant patent rights of which they are aware and to provide supporting
documentation.
Document type: OGC
®
Abstract Specification
Document subtype: if applicable
Document stage: Draft
Document language: English
OGC 15-104r4
2
Copyright © 2016 Open Geospatial Consortium
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OGC 15-104r4
3
Copyright © 2016 Open Geospatial Consortium
Contents
Abstract .............................................................................................................................. 9
Keywords ........................................................................................................................... 9
Preface ................................................................................................................................ 9
Submitting organizations ................................................................................................. 10
Submitters ........................................................................................................................ 10
Introduction ...................................................................................................................... 11
Scope ................................................................................................................................ 16
1. Conformance .......................................................................................... 17
2. References .............................................................................................. 17
3. Terms and Definitions ............................................................................ 19
3.1 base unit polyhedron .............................................................................. 19
3.2 boundary ................................................................................................. 19
3.3 cell refinement ........................................................................................ 19
3.4 class ........................................................................................................ 19
3.5 connected ................................................................................................ 20
3.6 convex hull ............................................................................................. 20
3.7 convex set ............................................................................................... 20
3.8 curve ....................................................................................................... 20
3.9 coordinate ............................................................................................... 20
3.10 coordinate reference system ................................................................... 21
3.11 data cell .................................................................................................. 21
3.12 data tile ................................................................................................... 21
3.13 data type ................................................................................................. 21
3.14 datum ...................................................................................................... 21
3.15 DGGS cell .............................................................................................. 22
OGC 15-104r4
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Copyright © 2016 Open Geospatial Consortium
3.16 DGGS coordinate reference system ....................................................... 22
3.17 DGGS domain ........................................................................................ 22
3.18 DGGS extent .......................................................................................... 22
3.19 DGGS reference frame ........................................................................... 22
3.20 dimensionally extended nine-intersection model ................................... 22
3.21 direct position ......................................................................................... 23
3.22 discrete global grid ................................................................................. 23
3.23 discrete global grid system ..................................................................... 23
3.24 Earth grid system .................................................................................... 23
3.25 edge type ................................................................................................ 23
3.26 ellipsoidal polygon ................................................................................. 23
3.27 end point ................................................................................................. 24
3.28 feature ..................................................................................................... 24
3.29 feature type ............................................................................................. 24
3.30 geo-encoding .......................................................................................... 24
3.31 geodetic identifier ................................................................................... 24
3.32 geometric object ..................................................................................... 25
3.33 geometric primitive ................................................................................ 25
3.34 geometric set .......................................................................................... 25
3.35 graphic cell ............................................................................................. 25
3.36 graphic tile .............................................................................................. 25
3.37 grid ......................................................................................................... 25
3.38 hierarchy ................................................................................................. 26
3.39 initial discrete global grid ....................................................................... 26
3.40 object ...................................................................................................... 26
3.41 observation ............................................................................................. 26
OGC 15-104r4
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Copyright © 2016 Open Geospatial Consortium
3.42 point ........................................................................................................ 26
3.43 property .................................................................................................. 26
3.44 property type .......................................................................................... 27
3.45 quantization ............................................................................................ 27
3.46 refined discrete global grid ..................................................................... 27
3.47 refinement ratio ...................................................................................... 27
3.48 sequence ................................................................................................. 27
3.49 set ........................................................................................................... 27
3.50 solid ........................................................................................................ 28
3.51 spatial object ........................................................................................... 28
3.52 spatial reference ..................................................................................... 28
3.53 spatial reference system ......................................................................... 28
3.54 start point ................................................................................................ 28
3.55 surface .................................................................................................... 28
3.56 tag ........................................................................................................... 29
3.57 tessellation .............................................................................................. 29
3.58 value ....................................................................................................... 29
4. Conventions ............................................................................................ 31
4.1 Identifiers ............................................................................................... 31
4.2 UML notation ......................................................................................... 31
4.3 Abbreviated terms .................................................................................. 31
5. DGGS Core Data Model (normative) .................................................... 32
5.1 DGGS Core Data Model Overview ....................................................... 32
5.2 DGGS Reference Frame Elements ......................................................... 33
5.2.1 Global Coverage ..................................................................................... 35
5.2.2 Tessellation Sequence ............................................................................ 35
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