AreaOfUse Class

Inherits from

Description

The AreaOfUse class represents the valid area of use for a given coordinate reference system or coordinate transformation. In prior versions of the GeoCalc library, this object was referred to as an Envelope, and contained minimum and maximum extent points defined in the WGS84 Geodetic coordinate system. With the updates to version 7.0, an optional polygon data component has been added to the class architecture. The point definitions for both the polygon and extent points are always specified in two dimensions using WGS84 Geodetic points.

Each CoordSys, and CoordTransform type contains an AreaOfUse object that can be used to limit the availability of objects based on the geographic area of a given dataset. It is also possible to use this object to do basic contains queries using the InBounds() method. For additional information about disabling polygon and MBR area checks inside of a GeoCalc application, please see the SetIgnorePolygonAreaOfUse() and SetIgnoreAreaOfUse() methods on the Datasource.

Constructors

Constructor	Description
AreaOfUse	Creates a new instance of the AreaOfUse class

Properties

Property	Description
AlwaysAccept	Gets or sets whether the AreaOfUse should always accept point data as being within its bounds. If false, then the AreaOfUse's bounds will be used to accept or reject point data.
AOUCode	Gets the AreaOfUse's Code for use in looking up an associated polygon.
MaxPoint	Gets or sets the AreaOfUse's maximum coordinate bounds.
MaxPointAdjusted	Gets the AreaOfUse's adjusted maximum coordinate bounds.
MinPoint	Gets or sets the AreaOfUse's minimum coordinate bounds.
MinPointAdjusted	Gets the AreaOfUse's adjusted minimum coordinate bounds.
PolygonDefinition	Gets the polygon definition.
Inherited Property	Description
AlwaysSaveToCustom	Inherited from Serializable.
DeprecatedTimestamp	Inherited from Serializable.
HistoryList	Inherited from Serializable.
Identifiers	Inherited from Serializable.
IsBase	Inherited from Serializable.
IsDeprecated	Inherited from Serializable.
IsFileBased	Inherited from Serializable.
IsReadOnly	Inherited from Serializable.
IsUsable	Inherited from Serializable.
Name	Inherited from Serializable.
ObjectType	Inherited from Serializable.
ObjectTypeName	Inherited from Serializable.
Remarks	Inherited from Serializable.
RevisionTimestamp	Inherited from Serializable.

Methods

Method	Description
CalculateArea	Calculate the area of the rectangular bounds.
Clone	Creates a clone of this object. (Overrides the abstract Serializable.Clone()).
Equals	Value equals comparison. (Overrides Object.Equals()).
Equivalent	Comparison to see if the object obj is "nearly" equal to this. (Overrides the abstract Serializable.Equivalent()).
GetAdjustedExtents	Gets the AreaOfUse's 'adjusted' extents.
GetCenter	Gets the center of this area.
GetHashCode	Serves as a hash function for a particular type. (Overrides Object.GetHashCode()).
GetObjectDescription	Gets this object description (Overrides Serializable.GetObjectDescription()).
HasPolygonDefinition	Returns whether or not the AreaOfUse has an associated polygon
InBounds	Determines whether the specified point falls within the AreaOfUse bounds.
Intersects	Determines if two AreaOfUses intersects.
IsNearlyEqual	Comparison to see if the object obj is nearly equal to this. (Overrides Serializable.IsNearlyEqual()).
StrictlyEquals	Comparison to see if the object obj is exactly equal to this. (Overrides Serializable.StrictlyEquals()).
Inherited Method	Description
ClearSaveInfo	Inherited from Serializable.
ClearUsabilityFlags	Inherited from Serializable.
EquivalentDiffs	Inherited from Serializable.
GetType	Gets the Type of the current instance. (Inherited from Object).
IsBaseNearlyEqual	Inherited from Serializable.
IsUsabilityFlagSet	Inherited from Serializable.
SetUsabilityFlag	Inherited from Serializable.
ToString	Returns a string that represents the current object. (Inherited from Object).
TryToFixUsability	Inherited from Serializable.
UnsetUsabilityFlag	Inherited from Serializable.

Overloaded Operators

Operator	Description
operator=	Assigns a new value to this AreaOfUse
operator==	Compares the value of two AreaOfUse objects
operator!=	Compares the value of two AreaOfUse objects