DiscreteCoverageDefinition Class

This coverage definition provides a convenient way to organize and initialize a coverage calculation, which computes access calculations over a set of grid points. Each access calculation represents a logical operation determining whether a set of constraints are satisfied for geometry involving one grid point and any number of other assets. For more information, see the Coverage section of the documentation.

In contrast to the coverage definitions that inherit from ContinuousCoverageDefinition, which partition the calculation into groups of grid points, this coverage calculation will configure the grid to be evaluated in lock-step in time slices to take advantage of caching redundant calculations common among all grid points. The advantage of this approach is that it can significantly reduce the overall computation time in cases where Earth fixed-to-inertial frame calculations, communications network analysis, or other calculations largely independent of any particular grid point are needed. The calculation can also be configured with a larger or smaller timestep to trade off between overall run time and the resolution of the access calculations. If the step size is too small, coverage definitions derived from ContinuousCoverageDefinition may perform better by doing dynamic sampling over time rather than performing a large number of nearly-identical calculations. However, if the step size is too large, the discrete calculation may miss short intervals that are smaller than the stepsize.

Inheritance Hierarchy

SystemObject
  AGI.Foundation.InfrastructureDefinitionalObject
    AGI.Foundation.CoverageBaseCoverageDefinition
      AGI.Foundation.CoverageDiscreteCoverageDefinition
        AGI.Foundation.CoverageMaterializedTemporallyPartitionedCoverageDefinition
        AGI.Foundation.CoverageParameterizedTemporallyPartitionedCoverageDefinition

Namespace: AGI.Foundation.Coverage
Assembly: AGI.Foundation.Spatial (in AGI.Foundation.Spatial.dll) Version: 24.2.419.0 (24.2.419.0)

Syntax

C++

Copy

public abstract class DiscreteCoverageDefinition : BaseCoverageDefinition

Public MustInherit Class DiscreteCoverageDefinition
	Inherits BaseCoverageDefinition

public ref class DiscreteCoverageDefinition abstract : public BaseCoverageDefinition

[<AbstractClassAttribute>]
type DiscreteCoverageDefinition =  
    class
        inherit BaseCoverageDefinition
    end

The DiscreteCoverageDefinition type exposes the following members.

Constructors

	Name	Description
	DiscreteCoverageDefinition	Initializes a new instance with FindAccessBetweenSteps set to .
	DiscreteCoverageDefinition(DiscreteCoverageDefinition, CopyContext)	Initializes a new instance as a copy of an existing instance.

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Properties

	Name	Description
	AssetDefinitions	Gets or sets the asset definitions defined for this coverage definition. (Inherited from BaseCoverageDefinition.)
	Assets	Gets a read-only collection of assets which provide coverage over the grid. (Inherited from BaseCoverageDefinition.)
	Filter	Gets or sets the constraint which indicates the bound on the number of assets which must have access to a grid point in order to provide coverage. (Inherited from BaseCoverageDefinition.)
	FindAccessBetweenSteps	Gets or sets a value indicating whether to perform additional access calculations between time steps where access was either gained or lost. If this is , when a new step determines that access is now satisfied, the satisfied interval will begin at the time of that step. This defaults to .
	Grid	Gets or sets the grid used to generate points of interest over which to analyze coverage. (Inherited from BaseCoverageDefinition.)
	GridPointService	Gets or sets the service used at each grid point. This should be an IPlaceHolderService in the case of delegate based coverage definitions such as, MaterializedSpatiallyPartitionedCoverageDefinition. This should be an Object with an ILocationPointService in the case of template based coverage definitions such as ParameterizedSpatiallyPartitionedCoverageDefinition. (Inherited from BaseCoverageDefinition.)
	IsFrozen	Gets a value indicating whether this object is frozen. A frozen object cannot be modified and an ObjectFrozenException will be thrown if an attempt is made to do so. (Inherited from DefinitionalObject.)
	MultithreadCoverage	Gets or sets a value indicating whether to use multiple threads to compute coverage. This is by default. (Inherited from BaseCoverageDefinition.)

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Methods

	Name	Description
	AddAsset(AssetDefinition)	Add an asset to the coverage definition. (Inherited from BaseCoverageDefinition.)
	AddAsset(Object, AccessQuery)	Add an asset to the coverage definition. (Inherited from BaseCoverageDefinition.)
	AddAssetRange	Add a range of assets to the coverage definition. (Inherited from BaseCoverageDefinition.)
	CheckForSameDefinition(BaseCoverageDefinition)	Checks to determine if another instance has the same definition as this instance and returns if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Overrides BaseCoverageDefinitionCheckForSameDefinition(BaseCoverageDefinition).)
	CheckForSameDefinition(DefinitionalObject)	Checks to determine if another instance has the same definition as this instance and returns if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Inherited from BaseCoverageDefinition.)
	CheckForSameDefinition(DiscreteCoverageDefinition)	Checks to determine if another instance has the same definition as this instance and returns if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object).
	Clone	Clones this object using the specified context. (Inherited from DefinitionalObject.)
	ComputeCoverageOverTheGrid(TimeIntervalCollection, Duration)	Computes the CoverageResults which stores the results of this calculation for the whole grid. Results for each grid point are stored in a CoverageQueryResult, the collection of which is contained by the overall result. Call this method after setting up the Grid and adding the desired Assets to the definition.
	ComputeCoverageOverTheGrid(JulianDate, JulianDate, Duration)	Computes the CoverageResults which stores the results of this calculation for the whole grid. Results for each grid point are stored in a CoverageQueryResult, the collection of which is contained by the overall result. Call this method after setting up the Grid and adding the desired Assets to the definition.
	ComputeCoverageOverTheGrid(TimeIntervalCollection, Duration, ITrackCalculationProgress)	Computes the CoverageResults which stores the results of this calculation for the whole grid. Results for each grid point are stored in a CoverageQueryResult, the collection of which is contained by the overall result. Call this method after setting up the Grid and adding the desired Assets to the definition.
	ComputeCoverageOverTheGrid(JulianDate, JulianDate, Duration, ITrackCalculationProgress)	Computes the CoverageResults which stores the results of this calculation for the whole grid. Results for each grid point are stored in a CoverageQueryResult, the collection of which is contained by the overall result. Call this method after setting up the Grid and adding the desired Assets to the definition.
	ComputeCurrentDefinitionHashCode	Computes a hash code based on the current properties of this object. Derived classes MUST override this method and compute a hash code that combines: a unique hash code seed, the base implementation result, and the hash codes of all new fields introduced by the derived class which are used in the CheckForSameDefinition(DefinitionalObject) method. (Overrides BaseCoverageDefinitionComputeCurrentDefinitionHashCode.)
	CreateGridPoint	Creates a CoverageGridPointWithResults suitable for computing coverage. (Inherited from BaseCoverageDefinition.)
	EnumerateDependencies	Enumerates the dependencies of this object by calling EnumerateT(T) for each object that this object directly depends upon. Derived classes which contain additional dependencies MUST override this method, call the base implementation, and enumerate dependencies introduced by the derived class. (Inherited from BaseCoverageDefinition.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	Freeze	Freezes this object. Further attempts to modify it will result in an ObjectFrozenException. (Inherited from DefinitionalObject.)
	FreezeAggregatedObjects	Called by Freeze to also freeze any objects that are considered to be a part of this object. Derived classes which contain additional aggregated objects MUST override this method, call the base implementation, and freeze aggregated objects introduced by the derived class. The objects that need to be frozen in this method are frequently created in this object's constructor and are not settable via properties. (Inherited from BaseCoverageDefinition.)
	GetDefinitionHashCode	Gets a hash code representing the definition of this object. (Inherited from DefinitionalObject.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsSameDefinition	Determines if this object has the same definition as another object. (Inherited from DefinitionalObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	RemoveAllAssets	Removes all asset definitions for all assets from this coverage definition. (Inherited from BaseCoverageDefinition.)
	RemoveAsset(AssetDefinition)	Removes the specified asset definition from the list of assets. (Inherited from BaseCoverageDefinition.)
	RemoveAsset(Object)	Removes the specified asset from the list of assets. (Inherited from BaseCoverageDefinition.)
	ThrowIfFrozen	Throws ObjectFrozenException if this object IsFrozen. This method should be called from any method or property that modifies this object. (Inherited from DefinitionalObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	ValidateProperties	Validates all of the properties of the coverage definition. (Inherited from BaseCoverageDefinition.)

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Reference

AGI.Foundation.Coverage Namespace