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For the bottom half of the tank, the modeler uses a Composite Material consisting of paint surface substrate, metal primary substrate and oil secondary substrate.
Thermal Infrared Visible
Figure 2- 8: Thermal Simulation of Oil Tank Composite Materials
Note that since the metal substrate is several centimeters thick, it is not considered to be the surface substrate of the oil. Figure 2-8: Thermal Simulation of Oil Tank Composite Materials,
illustrates the different simulation responses for a FLIR and an OTW CDB client device for this particular example.
2.5.2.2 Composite Material Tables CMT
Composite Material Tables provide the means by which Composite Materials can be defined. Each entry within a Composite Material Table defines a structured arrangement of basic
materials or of aggregates i.e., a Composite Material. Each Composite Material entry is assigned a Composite Material Index and an optional name. CDB datasets can then make use
of the index value in order to select Composite Materials.
There are several Composite Material Tables spread across the CDB hierarchy. Note however that all Composite Material Tables follow a common XML notation that describes each
Composite Material into its primary substrate, surface and secondary substrate components. Composite Materials Tables can take various forms, either as distinct XML files or embedded
XML code within a file.
Here is the XML notation for a Composite Material Table:
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Composite_Material_Table Composite_Material index=...
Name...Name Surface_Substrate
Material Name...Name
Weight...Weight Material
-- Insert other Material as needed -- Surface_Substrate
Primary_Substrate Material
Name...Name Weight...Weight
Material -- Insert other Material as needed --
Thickness...Thickness Primary_Substrate
Secondary_Substrate Material
Name...Name Weight...Weight
Material -- Insert other Material as needed --
Thickness...Thickness Secondary_Substrate
-- Insert other Secondary_Substrate as needed -- Composite_Material
-- Insert other Composite_Material as needed -- Composite_Material_Table
Requirement 24
http:opengis.netspecCDB1.0cor eprimary-substrate
There SHALL be only one Primary_Substrate.
If there is a Surface_Substrate there shall be only one. However, a Surface_Substrate is optional.
The Secondary_Substrate and the Thickness are optional. To specify aggregates more than one material attribute in the MIT, the Material block is repeated. The Secondary_Substrate is
provided and optionally repeated to described composite stratified materials. They appear in order starting from the Surface_Substrate, if present, followed by the Primary_Substrate nearest
to the surface, and followed by the Secondary Substrate, if present.
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Requirement 25
http:opengis.netspecCDB1.0cor ebase-material-order
The base materials that make each substrate SHALL be listed in decreasing order of weighting.
Requirement 26
http:opengis.netspecCDB1.0cor ecomposite-material-tag
Each composite material SHALL be tagged with a non-negative integer index, zero being reserved for default value that is assigned by the CDB data manipulation tools.
In addition, each composite material can be optionally tagged with a descriptive name. The CDB composite material table mechanism provides the means to tag each CDB composite
material with a data store tool-specific or modeler-specific composite material name.
2.5.2.3 Example 1
