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Copyright © 2015 Open Geospatial Consortium.
title for the symbol language
dct:description Multilingual human readable
description for the symbol string
0..n one per language
specification Reference to the full details of
the portrayal symbol Resource
0..1 denotes
Concept that is denoted by the symbol
skos:Concept 0..n
definition Symbol Definition defining the
composition structure of the symbol
SymbolDefinition 0..1
symbolSet The SymbolSet which this
symbol belongs to. SymbolSet
0..n skos:notation
Notation used to refer the symbol as defined in a notation
system. Use a custom datatype if multiple notations are used
string 0..n
The following listing shows the encoding in Turtle for the WindChill symbol belonging to the EMS SymbolSet.
:ems.incident.temperature.windChill-symbol a symbol:Symbol ;
rdfs:label windChill ; dct:identifier ems.incident.temperature.windChill ;
symbol:definition :ems.incident.temperature.windChill-symbolDefinition ; symbol:denotes
http:www.opengis.nettaxonomyemsems.incident.temperature.windChill ; symbol:specification https:cms.masas-
x.ca.s3.amazonaws.comEMS_Symbology_v1.0.pdf ; symbol:symbolSet :EMSSymbolSet ;
skos:notation ems.incident.temperature.windChill:emsNotation .
9.4.3 SymbolDefinition
SymbolDefinition is root type for types that defines the composition of symbols. It represents the technical definition of a symbol. A symbol definition is composed as
collection of symbol components, which contain the graphic elements and attributes used
Copyright © 2015 Open Geospatial Consortium.
33 to define a symbol. This concept has been aligned with the ISO 19117 standard. Table 8
summarizes the properties of the SymbolDefinition.
Table 8 SymbolDefinition Properties
Name Definition
Type Multiplicity
dct:description Multilingual human readable
description of the symbol string
0..n one per
language
browseGraphic Specifies graphics that may be
used as metadata for the symbol and used to give a sample of the
appearance of the symbol. The URL of the resource should be
resolvable. RDF Resource
0..n
component Refers to the graphic
component which makes up the symbol definition. A symbol
definition with no components portrays nothing for a given
feature. SymbolComponent
0..n
The following sample encoded in Turtle format shows the symbol definition of the windChill symbol, which is composed of a pointIcon .
:ems.incident.temperature.windChill-symbolDefinition a symbol:PointSymbolDefinition ;
dct:description Technical definition for symbol ems.incident.temperature.windChill; symbol:browseGraphic
http:ows.usersmarts.comemsiconstier1Baseems.incident.temperature.windChill.pn g ;
symbol:component :ems.incident.temperature.windChill-pointIcon .
9.4.4 SymbolComponent
A SymbolComponent is the root type for types that defined the graphic representation of symbols. A Symbol Component is comprised of graphic elements, which are graphic
objects and attributes used to define a symbol component. A symbol component can also refer to a formal specification document. Table 9 summarizes the properties of the
SymbolComponent.
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Copyright © 2015 Open Geospatial Consortium.
Table 9 SymbolComponent properties
