Subclass of:

• crm:E41 Appellation
• crm:E59 Primitive Value

Scope note:

This class comprises instances of E59 Primitive Value for space that should be implemented with appropriate validation, precision and references to spatial coordinate systems to express geometries on or relative to Earth, or on any other stable constellations of matter, relevant to cultural and scientific documentation.

An instance of E94 Space Primitive defines an instance of E53 Place in the sense of a declarative place as elaborated in CRMgeo (Doerr & Hiebel 2013), which means that the identity of the place is derived from its geometric definition. Such a declarative place may allow for the approximation of instances of E53 Place defined by the actual extent of some phenomenon, such as a settlement or a riverbed, or other forms of identification rather than by an instance of E94 Space Primitive. Note that using an instance of E94 Space Primitive for approximating the actual extent of some place always defines a (declarative) instance of E53 Place in its own right.

Definitions of instances of E53 Place using different spatial reference systems are always definitions of different instances of E53 Place.

Instances of E94 Space Primitive provide the ability to link CIDOC CRM encoded data to the kinds of geometries used in maps or Geoinformation systems. They may be used for visualization of the instances of E53 Place they define, in their geographic context and for computing topological relations between places based on these geometries. E94 Space Primitive is not further elaborated upon within this model. It is considered good practice to maintain compatibility with OGC standards.

Examples:

<gml:Point gml:id="p21" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"> <gml:coordinates>45.67, 88.56</gml:coordinates> </gml:Point> 

“40°31'17.9"N 21°15'48.3"E” [A single point for approximating the centre of the city of Kastoria, Greece]

POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10)) [Well-Known Text (WKT)]

In First Order Logic:

• E94(x) ⇒ E41(x)
• E94(x) ⇒ E59(x)

Incoming properties:

• crm:E53 Place → crm:P168 place is defined by (defines place)
• crm:E53 Place → crm:P171 at some place within
• crm:E53 Place → crm:P172 contains