[x3d-public] X3D geospatial meeting planning, resolving issues X3D4/X3D4.1

[GPU Group]

freewrl geospatial has:
- 5600 lines of code
https://sourceforge.net/p/freewrl/git/ci/develop/tree/freex3d/src/lib/scenegraph/Component_Geospatial.c
- web mercator map projection
http://dug9.users.sourceforge.net/web3d/tests/geo/web_mercator.x3d
-X3DGeoPlanet (for multiplanet scenes)
http://dug9.users.sourceforge.net/web3d/tests/geo/World/earthriseGP.x3d
- X3DGeoConvert (to convert between geographic coordinate systems, usually
chain 2 together with geographic coords as intermediate to go between
mapping planes)
http://dug9.users.sourceforge.net/web3d/tests/geo/geoConvert.x3d

Doug

On Thu, Mar 17, 2022 at 9:03 AM Andreas Plesch <andreasplesch at gmail.com>
wrote:

> Hello Don,
>
> Thank you for sharing the issues list.
>
> I am interested in:
>
> 865 X3D19775-1 (Abstract)V4.1normalconfirmedminor 25.3.7
> GeoPositionInterpolator - Add onGreatCircle field
> 940 X3D19775-1 (Abstract)V4.1normalconfirmedmajor 25.2.3 Specifying a
> spatial reference frame - Addition of new web Mercator system
>
> and would include those in X3D V.4 . I thought they would be but they
> seem deferred which may be unavoidable.
>
> I can log in to my web3d member page but I do not have a way to access
> the mantis pages. Could Anita help with that ?
>
> I think all other X3DV4 issues are properly resolved.
>
> I think Mike was interested in the new GeoOriginTransform node which I
> do not see listed. We have provided a full description in McCann et
> al., 2015.
>
> Similarly, there has been agreement to add a new globalGeoOrigin field
> to GeoTransform
>
> http://web3d.org/mailman/private/geospatial_web3d.org/2015-July/000036.html
>
> The field would be useful if GeoOrigin is not deprecated further. It
> provides for a saner way to use GeoOrigin taking advantage of the fact
> that typically in a scene only a single GeoOrigin makes sense.
>
> GeoOrigin unfortunately is still useful due to limited numerical
> precision in floating point arithmetic, at least for Ecmascript
> numbers.
>
> Hope this helps, Andreas
>
>
> On Thu, Mar 17, 2022 at 10:08 AM Brutzman, Donald (Don) (CIV)
> <brutzman at nps.edu> wrote:
> >
> > As mentioned in recent X3D meeting minutes, Dick and I are finalizing
> the X3D4 Architecture specification and hoping to assemble geospatial
> practitioners to confirm the following:
> >
> >
> >
> > We understand current and planned levels of X3D geospatial
> implementation maturity,
> > Triage on existing mantis issues: resolvable in X3D4, confirm and defer
> to X3D4.1, or no fix needed.
> >
> >
> >
> > Attached please find CSV file listing 15 relevant Mantis issues.  None
> are particularly complex or difficult, some are incidental.  All are
> available online at
> >
> > Web3D Mantis View Issues
> > https://www.web3d.org/member-only/mantis/view_all_bug_page.php
> >
> >
> >
> > Please ask Anita if you need membership access.  I can provide details
> on request for any issue.
> >
> >
> >
> > Mike is unavailable on Friday mornings.  Please advise regarding
> availability Monday-Thursday on 28-31 March or 4-7 April, regular meeting
> time 0800-0900 or 09-1000 pacific.
> >
> >
> >
> > We are very close.  It will be good to achieve shared understanding.
> This also helps our group achieve a stable playing field in anticipation of
> further work with Open Geospatial Consortium (OGC).
> >
> >
> >
> > If unable to attend, please advise regarding your technical opinion on
> any geospatial issue.
> >
> >
> >
> > References:
> >
> > X3D4 Architecture, annex 25 Geospatial component
> >
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/geospatial.html
> > X3D Example Archives: Basic, Geospatial
> > https://www.web3d.org/x3d/content/examples/Basic/Geospatial
> >
> >
> >
> > It has been a long and fruitful journey, we are steps away from a new
> plateau.  Thanks for your support of X3D4!   8)
> >
> >
> >
> > all the best, Don
> >
> > --
> >
> > Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
> >
> > Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
> +1.831.656.2149
> >
> > X3D graphics, virtual worlds, Navy robotics https://
> faculty.nps.edu/brutzman
> >
> >
>
>
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
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