Internet Engineering Task Force (IETF) M. Thomson
Request for Comments: 7035 Microsoft
Category: Standards Track B. Rosen
ISSN: 2070-1721 Neustar
D. Stanley
Aruba Networks
G. Bajko
Nokia
A. Thomson
Lookingglass
October 2013
Relative Location Representation
Abstract
This document defines an extension to the Presence Information Data
Format Location Object (PIDF-LO) (RFC 4119) for the expression of
location information that is defined relative to a reference point.
The reference point may be expressed as a geodetic or civic location,
and the relative offset may be one of several shapes. An alternative
binary representation is described.
Optionally, a reference to a secondary document (such as a map image)
can be included, along with the relationship of the map coordinate
system to the reference/offset coordinate system, to allow display of
the map with the reference point and the relative offset.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7035.
Thomson, et al. Standards Track [Page 1]RFC 7035 Relative Location October 2013Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
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described in the Simplified BSD License.
Thomson, et al. Standards Track [Page 2]RFC 7035 Relative Location October 2013Table of Contents
1. Introduction ....................................................4
2. Conventions Used in This Document ...............................4
3. Overview ........................................................4
4. Relative Location ...............................................7
4.1. Relative Coordinate System .................................8
4.2. Placement of XML Elements ..................................8
4.3. Binary Format ..............................................9
4.4. Distances and Angles .......................................9
4.5. Value Encoding ............................................10
4.6. Relative Location Restrictions ............................10
4.7. Baseline TLVs .............................................10
4.8. Reference TLVs ............................................10
4.9. Shapes ....................................................11
4.9.1. Point ..............................................11
4.9.2. Circle or Sphere Shape .............................12
4.9.3. Ellipse or Ellipsoid Shape .........................13
4.9.4. Polygon or Prism Shape .............................15
4.9.5. Arc-Band Shape .....................................18
4.10. Dynamic Location TLVs ....................................20
4.10.1. Orientation .......................................20
4.10.2. Speed .............................................20
4.10.3. Heading ...........................................20
4.11. Secondary Map Metadata ...................................21
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