SPS Application Profile for EO Sensors OGC 07-018r2
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24
9. Information models for EO Programming Requests
9.1. ParameterDescriptor element
Each sensor may require a different set of tasking parameters. In order to know the list of required parameters, the client performs either a describeGetFeasibility operation, which returns the
parameters for a feasibility study, or a describeSubmit, which returns the parameters for sensor tasking.
The tasking parameters are described by the
ParameterDescriptor
element:
Figure 9-1 – ParameterDescriptor
SPS Application Profile for EO Sensors OGC 07-018r2
Copyright © 2008 Open Geospatial Consortium, Inc. All Rights Reserved.
25
9.1.1. EO profile specific
- The
ParameterDescriptor
element is based on the SPS
InputParameterDescriptor
[NR13]
.
It has been renamed because it defines not only input but also output parameters.
- the
definition
element is unbounded. Reason: a parameter may be described by more than one definition. Example: a
ROI
Region Of Interest may be defined by a
Polygon
OR a
Circle
. -
the
definition
element may contain a
ParameterDescriptor
element recursivity. Reason: this allows a parameter to contain a list of parameters.
9.1.2. Example
The following example illustrates the recursivity, showing a parameter
scene
composed by 4 parameters satellite, resolution, geoLocation and successRate:
ParameterDescriptor parameterID
= scene
updateable =
false use
= optional
Description Pseudo scene
Description definition
ParameterDescriptor use
= optional
parameterID =
satellite updateable
= false
definition commonData
swe:Category commonData
definition ParameterDescriptor
ParameterDescriptor use
= optional
parameterID =
resolution updateable
= false
definition commonData
swe:Quantity commonData
definition ParameterDescriptor
ParameterDescriptor use
= required
parameterID =
geoLocation updateable
= false
definition GeometryDefinition
gml:polygon GeometryDefinition
definition ParameterDescriptor
ParameterDescriptor use
= required
parameterID =
successRate updateable
= false
definition commonData
swe:Count swe:constraint
swe:AllowedValues swe:min
swe:min swe:max
100 swe:max
swe:AllowedValues swe:constraint
swe:Count commonData
definition ParameterDescriptor
Note: an example of input parameters for SPOT5 tasking is given in annex B of this document.
SPS Application Profile for EO Sensors OGC 07-018r2
Copyright © 2008 Open Geospatial Consortium, Inc. All Rights Reserved.
26
9.2. Parameter element
