On 6/7/2021 1:45 PM, Stephen Stead wrote:
I am having a problem with the phrase “*contiguous, mutually
disjoint”*which, to me, seems to be a contradiction in terms.
Is the intention to say that we can have a known set of disjointed
areas which are each, individually, contiguous?
Exactly 😁
Rgds
SdS
Stephen Stead
Tel +44 20 8668 3075
Mob +44 7802 755 013
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*From:*Crm-sig <[email protected]> *On Behalf Of *Martin
Doerr via Crm-sig
*Sent:* 06 June 2021 19:50
*To:* crm-sig <[email protected]>
*Subject:* [Crm-sig] Issue 498, disjoint places
Dear All,
Here my proposal for revision of the scope note of E53 Place:
*OLD:*
E53 Place
Subclass of:
E1 <#_toc7281> CRM Entity
Scope note:
This class comprises extents in space, in particular on the surface of
the earth, in the pure sense of physics: independent from temporal
phenomena and matter.
The instances of E53 Place are usually determined by reference to the
position of “immobile” objects such as buildings, cities, mountains,
rivers, or dedicated geodetic marks, but may also be determined by
reference to mobile objects. A Place can be determined by combining a
frame of reference and a location with respect to this frame.
It is sometimes argued that instances of E53 Place are best
identified by global coordinates or absolute reference systems.
However, relative references are often more relevant in the context of
cultural documentation and tend to be more precise. In particular, we
are often interested in position in relation to large, mobile objects,
such as ships. For example, the Place at which Nelson died is known
with reference to a large mobile object – H.M.S Victory. A resolution
of this Place in terms of absolute coordinates would require knowledge
of the movements of the vessel and the precise time of death, either
of which may be revised, and the result would lack historical and
cultural relevance.
Any instance of E18 Physical Thing can serve as a frame of reference
for an instance of E53 Place. This may be documented using the
property /P157 is at rest relative to (provides reference space for)/.
*NEW:*
E53 Place
Subclass of:
E1 <#_toc7281> CRM Entity
Scope note:
This class comprises extents in *the* natural space *we live in*, in
particular on the surface of the earth, in the pure sense of physics:
independent from temporal phenomena and matter. *They may serve
describing the physical location of things or phenomena or other areas
of interest. Geometrically, instances of E53 Place constitute single
contiguous areas or a finite aggregation of contiguous, mutually
disjoint areas in space. They may have fuzzy boundaries. *
The instances of E53 Place are usually determined by reference to the
position of “immobile” objects such as buildings, cities, mountains,
rivers, or dedicated geodetic marks, but may also be determined by
reference to mobile objects. A Place can be determined by combining a
frame of reference and a location with respect to this frame.
It is sometimes argued that instances of E53 Place are best
identified by global coordinates or absolute reference systems.
However, relative references are often more relevant in the context of
cultural documentation and tend to be more precise. In particular, we
are often interested in *positions* in relation to large, mobile
objects, such as ships. For example, the Place at which Nelson died is
known with reference to a large mobile object – H.M.S Victory. A
resolution of this Place in terms of absolute coordinates would
require knowledge of the movements of the vessel and the precise time
of death, either of which may be revised, and the result would lack
historical and cultural relevance.
Any instance of E18 Physical Thing can serve as a frame of reference
for an instance of E53 Place. This may be documented using the
property P157 is at rest relative to (provides reference space for).
--
------------------------------------
Dr. Martin Doerr
Honorary Head of the
Center for Cultural Informatics
Information Systems Laboratory
Institute of Computer Science
Foundation for Research and Technology - Hellas (FORTH)
N.Plastira 100, Vassilika Vouton,
GR70013 Heraklion,Crete,Greece
Vox:+30(2810)391625
Email:[email protected] <mailto:[email protected]>
Web-site:http://www.ics.forth.gr/isl <http://www.ics.forth.gr/isl>
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--
------------------------------------
Dr. Martin Doerr
Honorary Head of the
Center for Cultural Informatics
Information Systems Laboratory
Institute of Computer Science
Foundation for Research and Technology - Hellas (FORTH)
N.Plastira 100, Vassilika Vouton,
GR70013 Heraklion,Crete,Greece
Vox:+30(2810)391625
Email: [email protected]
Web-site: http://www.ics.forth.gr/isl
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