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Subject: Re: [emergency] Kent State Symbology Study

Allen -

The topic of symbology may be an opportunity for the EM TC and the OGC to
collaborate. Our membership has done considerable work in the "how" of
interoperability for encoding and communicating symbology. We do not deal
with the actual definitions (content) for symbols. Symbology definition is
better done by groups such as USGS, FEMA, NIMA, APWA, and so forth.

For example, we have an OpenGIS specification called "Style Layer
Descriptor" (SLD). SLD - using XML Schema - provides a mechanism for
expressing symbology portrayal rules to an application client or to a
server. The reason our members defined and adopted SLD as a specification is
that when a user is requesting spatial data from multiple servers, how can
the user be assured that they will see the spatial data rendered in a common
consistent manner using symbology that they are used to?

We are also working on various other aspects related to interoperability and
symbology, such as symbology metadata and how to build, maintain, and access
a library of symbol libraries.

The SLD specification can be found on the public portion of our web site

I look forward to exploring this potential area of collaboration.


Carl Reed

----- Original Message -----
From: Allen Wyke <emtc@nc.rr.com>
To: David Hall <dhall@federalsupportsystems.com>
Cc: Emergency Management TC <emergency@lists.oasis-open.org>;
Sent: Monday, July 14, 2003 7:35 PM
Subject: Re: [emergency] Kent State Symbology Study

> This is actually an excellent report. I have cross posted it with the
> Eliot/Bill: I recommend we attempt to contact Dr. Dymon
> (udymon@kent.edu) and see if he can speak at one of your con calls. In
> conjunction, we should try and ascertain the status of the work at FEMA,
> if they received this paper, and get their thoughts/direction. The goal
> would be to specify where we (the EM TC) plans to draw its symbology
> from, even if it is in a working draft state.
> Thoughts?
> Allen
> On Tue, 2003-07-01 at 13:36, David Hall wrote:
> > The following is a link to the Emergency symbology study performed by
> > Kent State for FEMA that was mentioned in today's XML committee call.
> >
> > http://dept.kent.edu/geography/Dymon/symbology.htm
> >
> >
> > ******************************
> > David Hall
> > Federal Support Systems
> > 703-627-0215
> > 703-832-5664 fax
> > -----------------------------
> > System Engineering
> > Information Security
> > Internet Software Systems
> > Project Management
> > ******************************
> >
> --
> R. Allen Wyke
> Chair, Emergency Management TC
> emtc@nc.rr.com
> http://www.oasis-open.org/committees/emergency
> You may leave a Technical Committee at any time by visiting

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