Interface ISpatialReference

The OGC Spatial Reference requirements.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.RadMap.dll

Syntax

public interface ISpatialReference

Properties

AngularUnitOfMeasurement

The measurement units used to define the angles of a spheroid or ellipse associated with a specific datum. The datum is usually WGS (World Geodetic System) 1984 and the unit of measurement is a degree.

Declaration
double AngularUnitOfMeasurement { get; set; }
Property Value
System.Double

Authority

The authority body that defines the standards for the spatial reference parameters. Spatial Reference is usually WGS 1984 and the authority is EPSG:4326.

Declaration
string Authority { get; set; }
Property Value
System.String

CentralMeridian

The line of longitude at the center of a map projection generally used as the basis for constructing the projection.

Declaration
double CentralMeridian { get; set; }
Property Value
System.Double

Datum

This indicates the horizontal datum, which corresponds to the procedure used to measure positions on the surface of the Earth.

Declaration
string Datum { get; set; }
Property Value
System.String

DatumAuthority

This indicates the horizontal datum, which corresponds to the procedure used to measure positions on the surface of the Earth.

Declaration
string DatumAuthority { get; set; }
Property Value
System.String

FalseEasting

The value added to all "x" values in the rectangular coordinate for a map projection. This value frequently is assigned to eliminate negative numbers. Expressed in the unit of measure identified in Planar Coordinate Units.

Declaration
double FalseEasting { get; set; }
Property Value
System.Double

FalseNorthing

The value added to all "y" values in the rectangular coordinates for a map projection. This value frequently is assigned to eliminate negative numbers. Expressed in the unit of measure identified in Planar Coordinate Units.

Declaration
double FalseNorthing { get; set; }
Property Value
System.Double

GeoGcs

A coordinate system based on latitude and longitude. Some geographic coordinate systems are Latitude/Longitude, and some are Longitude/Latitude. You can find out which this is by examining the axes. You should also check the angular units, since not all geographic coordinate systems use degrees.

Declaration
string GeoGcs { get; set; }
Property Value
System.String

LatitudeOfOrigin

The latitude chosen as the origin of rectangular coordinate for a map projection.

Declaration
double LatitudeOfOrigin { get; set; }
Property Value
System.Double

MaxLatitude

The maximum Latitude this tile source supports.

Declaration
double MaxLatitude { get; set; }
Property Value
System.Double

MaxLongitude

The maximum Longitude this tile source supports.

Declaration
double MaxLongitude { get; set; }
Property Value
System.Double

MinLatitude

The minimum Latitude this tile source supports.

Declaration
double MinLatitude { get; set; }
Property Value
System.Double

MinLongitude

The minimum Longitude this tile source supports.

Declaration
double MinLongitude { get; set; }
Property Value
System.Double

Primem

This defines the meridian used to take longitude measurements from. The units of the longitude must be inferred from the context.

Declaration
double Primem { get; set; }
Property Value
System.Double

PrimemAuthority

This defines the meridian used to take longitude measurements from. The units of the longitude must be inferred from the context.

Declaration
string PrimemAuthority { get; set; }
Property Value
System.String

ProjectionAuthority

This describes a projection from geographic coordinates to projected coordinates.

Declaration
string ProjectionAuthority { get; set; }
Property Value
System.String

SpheroidAuthority

This describes a spheroid, which is an approximation of the Earth's surface as a squashed sphere.

Declaration
string SpheroidAuthority { get; set; }
Property Value
System.String

SpheroidFlattening

This describes a spheroid, which is an approximation of the Earth's surface as a squashed sphere.

Declaration
double SpheroidFlattening { get; set; }
Property Value
System.Double

SpheroidRadius

This describes a spheroid, which is an approximation of the Earth's surface as a squashed sphere.

Declaration
double SpheroidRadius { get; set; }
Property Value
System.Double

StandardParallel

The line of constant latitude at which the surface of the Earth and the plane or developable surface intersect.

Declaration
double StandardParallel { get; set; }
Property Value
System.Double

UnitAuthority

The authority body that defines the unit of measurement i.e. European Petroleum Survey Group (EPSG). The unit of measurement is usually degrees and the authority for the datum the map uses, WGS 1984 is EPSG:4326.

Declaration
string UnitAuthority { get; set; }
Property Value
System.String

Methods

GeographicToLogical(PointG)

Converts a geographical coordinate (Longitude, Latitude) to a logical Point (0->1).

Declaration
PointG GeographicToLogical(PointG geographicPoint)
Parameters
PointG geographicPoint

The geographical coordinate (Longitude, Latitude).
Returns
PointG

The logical Point.

GetSizeInKilometers(PointG, SizeG)

Calculate size of rectangle from base point.

Declaration
SizeG GetSizeInKilometers(PointG basePoint, SizeG size)
Parameters
PointG basePoint

Base point (left-top).
SizeG size

Size in units of reference.
Returns
SizeG

Size of rectangle in kilometers.

GetSizeInReferenceUnits(PointG, SizeG)

Calculate size of rectangle from base point.

Declaration
SizeG GetSizeInReferenceUnits(PointG basePoint, SizeG size)
Parameters
PointG basePoint

Base point (left-top).
SizeG size

Size in kilometers.
Returns
SizeG

Size of rectangle in units of reference.

LogicalToGeographic(PointG)

Converts a logical Point (0->1) to a geographical coordinate (Longitude, Latitude).

Declaration
PointG LogicalToGeographic(PointG logicalPoint)
Parameters
PointG logicalPoint

The logical Point.
Returns
PointG

The geographical coordinate (Longitude, Latitude).

Extension Methods