From carson@siggraph.org Tue Apr 25 17:29:43 2000 Received: from mail.htg.net (mail.htg.net [209.136.26.18]) by dkuug.dk (8.9.2/8.9.2) with ESMTP id RAA44876 for ; Tue, 25 Apr 2000 17:29:42 +0200 (CEST) (envelope-from carson@siggraph.org) Received: from study (pm3-4-223.htg.net [216.253.7.223] (may be forged)) by mail.htg.net (8.9.3+Sun/8.9.0) with SMTP id JAA16623 for ; Tue, 25 Apr 2000 09:24:24 -0600 (MDT) Message-Id: <3.0.32.20000425102916.01ea5d2c@siggraph.org> X-Sender: carson@siggraph.org X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Tue, 25 Apr 2000 10:29:22 -0600 To: SC24@dkuug.dk From: Steve Carson Subject: Draft statement to Spatial Meeting Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=====================_956701762==_" --=====================_956701762==_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable There is a special JTC 1 meeting on Spatial Standards scheduled for 2-4 May in Geneva. Over the past few days (April 18 and April 23) some input documents have been submitted to this meeting that our WG 8 (Environmental Representation) feels we must respond to if the meeting is to hear the SC 24 and SEDRIS side of the story.=20 You can view all the input documents at this web site: http://www.spatialstandards.org/doi-April2000.htm We have prepared SC 24 N 2120 whose text is copied into this message and which is also attached as HTML. We will submit this tomorrow (Wednesday 26 April) assuming no NBs object to its contents. Sorry for the short notice but we are forced to respond quickly to last minute inputs from TC 211 and OGC. - - - JTC 1/SC 24 N 2120 Statement from JTC 1/SC 24 to the JTC 1 Spatial Meeting in Geneva 2-4 May= 2000 SC 24 regrets that its experts in environmental representation will be unable to attend the second Spatial Meeting to be held in Geneva from 2-4 May 2000. We informed Mr. Martin Ford of the SEDRIS Associates Meeting that is talking place on those dates in Chicago, Illinois, USA and that our experts are already committed to attend that meeting. 1 Overlaps in programs of work As part of its preparatory work for this series of meetings SC 24 experts have reviewed the program of work of ISO TC 211 and its draft standards. We call the attention of those attending the second Spatial Meeting (as well as JTC 1 and TC 211 in general) to the fact that several items in the TC 211 program of work significantly overlap the scope of JTC 1/SC 24. Drafts of these TC 211 standards reviewed by SC 24 experts at present conflict with many published International Standards. Four specific examples of such overlap with identified opportunities for synergistic collaboration follow: 1.1 ISO/PDTR 16569.2, Geographic information - Imagery and gridded data , TC 211 N 752 There is an opportunity for this standard to be developed as a profile of ISO/IEC 12087 Basic Image Interchange Format (BIIF). SC 24 has long standing and widely recognized expertise in image processing (to include what is often called gridded data) and image interchange formats. 1.2 ISO/CD 19104.2, Geographic information - Terminology , TC 211 N 816 This draft standard gives different and incompatible definitions to many terms that have established definitions in published International Standards developed by SC 24. A few examples are: digital image, image, edge, event, face, feature, node, polygon, primitive, geometric primitive, surface patch, texture and transformation. 1.3 ISO/CD 19117.3, Geographic information - Portrayal , TC 211 N 828 There is an opportunity to base this standard on profiles of one or more of SC 24's published International Standards. Candidates include: Computer Graphics Metafile (CGM) ISO/IEC 8632 Virtual Reality Modeling Language (VRML) ISO/IEC 14772 (to include the recently developed GeoVRML extension.) Portable Network Graphics (PNG) FDIS 15948 other SC 24 standards such as GKS (ISO 7942), PHIGS (ISO/IEC 9592) and CGI (ISO 9636) Several of the above SC 24 standards (CGM, VRML, PNG) are already used in commercial practice to portray geographic information. Examples were demonstrated by SC 24 experts at the first Spatial Meeting in Menlo Park, California, USA in February 2000. 1.4 ISO/CD 19107, Geographic information - Spatial schema , TC 211 N 818 The definitions and concepts in this draft standard conflict with established definitions in published International Standards developed by SC 24. Some of these concepts and definitions are point, face, edge, primitive, curve, solid, surface, spline, surface patch, conics, and polygonal surface. These and similar concepts are developed and defined in SC 24 standards that include PHIGS (ISO/IEC 9592), VRML (ISO/IEC 14772) and CGM (ISO/IEC 8632). There is a substantial opportunity for synergistic collaboration if TC 211 were to base this standard on the published work of SC 24 rather than creating conflicting new concepts. SC 24 believes that since so much of the work of TC 211 overlaps that of SC 24 that substantial opportunities exist for collaborative work and exploitation of standards developed by SC 24 in the work of TC 211. Such collaboration is expected to have a synergistic effect that will benefit both organizations. 2 Summary SC 24 notes that overlaps in areas of work are inevitable when one committee such as JTC 1 has the scope "Information technology" and then new committees are formed to address Information Technology for specific application areas such as TC 204 (Transport information and control systems), TC 211 (Geographic information/geomatics), and TC 215 (Health informatics). Rather that reacting to such overlaps negatively, SC 24 chooses to view them as opportunities for synergistic collaboration.=A0 In this spirit of cooperation SC 24 notes that its own work in process in transposing SEDRIS and related technologies into International Standards (ISO WDs 18023 - 18026) can benefit from properly referencing applicable TC 211 work. The Modeling and Simulation market that our standards address is a natural consumer of geographic information which forms an important basis for the Synthetic Environments that are the subject of our work. We have requested the assistance of TC 211 in assuring the highest possible degree of compatibility and interworking among our respective standards. --=====================_956701762==_ Content-Type: text/plain; charset="us-ascii" Content-Disposition: attachment; filename="statement to Geneva Meeting.htm" Statement from JTC 1

JTC 1/SC 24 N 2120

Statement from JTC 1/SC 24 to the JTC 1 Spatial Meeting in Geneva 2-4 May 2000

SC 24 regrets that its experts in environmental representation will be unable to attend the second Spatial Meeting to be held in Geneva from 2-4 May 2000. We informed Mr. Martin Ford of the SEDRIS Associates Meeting that is talking place on those dates in Chicago, Illinois, USA and that our experts are already committed to attend that meeting.

1 Overlaps in programs of work

As part of its preparatory work for this series of meetings SC 24 experts have reviewed the program of work of ISO TC 211 and its draft standards. We call the attention of those attending the second Spatial Meeting (as well as JTC 1 and TC 211 in general) to the fact that several items in the TC 211 program of work significantly overlap the scope of JTC 1/SC 24.  Drafts of these TC 211 standards reviewed by SC 24 experts at present conflict with many published International Standards. Four specific examples of such overlap with identified opportunities for synergistic collaboration follow:

1.1 ISO/PDTR 16569.2, Geographic information - Imagery and gridded data , TC 211 N 752

There is an opportunity for this standard to be developed as a profile of ISO/IEC 12087 Basic Image Interchange Format (BIIF). SC 24 has long standing and widely recognized expertise in image processing (to include what is often called gridded data) and image interchange formats.

1.2 ISO/CD 19104.2, Geographic information - Terminology , TC 211 N 816

This draft standard gives different and incompatible definitions to many terms that have established definitions in published International Standards developed by SC 24. A few examples are: digital image, image, edge, event, face, feature, node, polygon, primitive, geometric primitive, surface patch, texture and transformation.

1.3 ISO/CD 19117.3, Geographic information - Portrayal , TC 211 N 828

There is an opportunity to base this standard on profiles of one or more of SC 24's published International Standards. Candidates include:

  • Computer Graphics Metafile (CGM) ISO/IEC 8632
  • Virtual Reality Modeling Language (VRML) ISO/IEC 14772 (to include the recently developed GeoVRML extension.)
  • Portable Network Graphics (PNG) FDIS 15948
  • other SC 24 standards such as GKS (ISO 7942), PHIGS (ISO/IEC 9592) and CGI (ISO 9636)

Several of the above SC 24 standards (CGM, VRML, PNG) are already used in commercial practice to portray geographic information. Examples were demonstrated by SC 24 experts at the first Spatial Meeting in Menlo Park, California, USA in February 2000.

1.4 ISO/CD 19107, Geographic information - Spatial schema , TC 211 N 818

The definitions and concepts in this draft standard conflict with established definitions in published International Standards developed by SC 24. Some of these concepts and definitions are point, face, edge, primitive, curve, solid, surface, spline, surface patch, conics, and polygonal surface. These and similar concepts are developed and defined in SC 24 standards that include PHIGS (ISO/IEC 9592), VRML (ISO/IEC 14772) and CGM (ISO/IEC 8632). There is a substantial opportunity for synergistic collaboration if TC 211 were to base this standard on the published work of SC 24 rather than creating conflicting new concepts.

SC 24 believes that since so much of the work of TC 211 overlaps that of SC 24 that substantial opportunities exist for collaborative work and exploitation of standards developed by SC 24 in the work of TC 211. Such collaboration is expected to have a synergistic effect that will benefit both organizations.

2 Summary

SC 24 notes that overlaps in areas of work are inevitable when one committee such as JTC 1 has the scope "Information technology" and then new committees are formed to address Information Technology for specific application areas such as TC 204 (Transport information and control systems), TC 211 (Geographic information/geomatics), and TC 215 (Health informatics).  Rather that reacting to such overlaps negatively, SC 24 chooses to view them as opportunities for synergistic collaboration. 

In this spirit of cooperation SC 24 notes that its own work in process in transposing SEDRIS and related technologies into International Standards (ISO WDs 18023 - 18026) can benefit from properly referencing applicable TC 211 work.  The Modeling and Simulation market that our standards address is a natural consumer of geographic information which forms an important basis for the Synthetic Environments that are the subject of our work.  We have requested the assistance of TC 211 in assuring the highest possible degree of compatibility and interworking among our respective standards.

--=====================_956701762==_ Content-Type: text/plain; charset="us-ascii" Steve Carson Chair, ISO/IEC JTC 1/SC 24 Computer Graphics and Image Processing --------------------------------------------------------- Steve Carson http://www.huntel.com/~carson/ GSC Associates http://www.gscassociates.com/ 5272 Redman Road phone:+1-505-521-7399; fax:+1-505-521-9321 Las Cruces, NM 88011 USA e-mail: carson@siggraph.org --------------------------------------------------------- --=====================_956701762==_--