DatumShiftInfo.AreaOfUseCode Property
Gets the EPSG code for the area of use for the datum shift.
Syntax
public System.Int32 AreaOfUseCode { get; }Property Value
Default: 0
An EPSG code that uniquely identifies the area of use for the datum shift. Zero means unknown.
Remarks
The EPSG database represents each Area of Use in five ways:
a unique area code (a number),
a short name,
a description that can be long,
a bounding rectangle expressed in Wgs84LongLat,
one or more polygons expressed in Wgs84LongLat.
This property is the area code for the corresponding datum shift, and there are other properties that are the name, description and bounding rectangle. But to find the polygons, you must look them up in a shapefile published by EPSG, using the area code as condition. The polygon attribute to check is called ExtentCode.
So, download the shapefile and make a ShapefileDataSet from it. If, for example, you have a datum shift whose area code is 1298 (which represents the area Europe - ETRS89), you can get the area polygons by calling DataSet.GetFeatures(featureQuery), where the FeatureQuery.Condition is
ExtentCode = 1298
See also Area of Use.
Platforms
Windows, Linux, Android