GeographicTransformationStep

AMD: require(["esri/geometry/support/GeographicTransformationStep"], (GeographicTransformationStep) => { /* code goes here */ });
ESM: import GeographicTransformationStep from "@arcgis/core/geometry/support/GeographicTransformationStep";
Class: esri/geometry/support/GeographicTransformationStep
Since: ArcGIS API for JavaScript 4.7

Represents a step in the process of transforming coordinates from one geographic coordinate system to another. A geographic transformation step can be constructed from a well-known ID (wkid) or a well known text (wkt) that represents a geographic datum transformation.

See also:

Constructors

new GeographicTransformationStep(properties)
Parameter:
properties Object
optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Name Type Summary Class
Booleanmore details

Indicates with the geographic transformation is inverted.

more detailsGeographicTransformationStep
Numbermore details

The well-known id (wkid) hat represents a known geographic transformation.

more detailsGeographicTransformationStep
Stringmore details

The well-known text (wkt) that represents a known geographic transformation.

more detailsGeographicTransformationStep

Property Details

isInverse Boolean

Indicates with the geographic transformation is inverted.

Default Value:false
wkid Number

The well-known id (wkid) hat represents a known geographic transformation. See Geographic datum transformations for the list of supported equation-based geographic transformations.

Example:
// Create a geographic transformation step for Tokyo_To_WGS_1984_2001 using its wkid
let geoStep = new GeographicTransformationStep({
  wkid: 108106
});
wkt String

The well-known text (wkt) that represents a known geographic transformation. See Geographic datum transformations for the list of supported equation-based geographic transformations.

Example:
// Create a geographic transformation step for NAD_1927_To_WGS_1984_1
// using its well known text or wkt
let wkt = "GEOGTRAN[\"NAD_1927_To_WGS_1984_1\",GEOGCS[\"GCS_North_American_1927\",DATUM[\"D_North_American_1927\",SPHEROID[\"Clarke_1866\",6378206.4,294.9786982]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"Geocentric_Translation\"],PARAMETER[\"X_Axis_Translation\",-3.0],PARAMETER[\"Y_Axis_Translation\",142.0],PARAMETER[\"Z_Axis_Translation\",183.0]]";
let geoStep = new GeographicTransformationStep({
  wkid: wkt
});

Method Overview

Name Return Type Summary Class
GeographicTransformationStepmore details

Gets the inverse of the geographic transformation step used to call this method or null if the transformation step is not invertible.

more detailsGeographicTransformationStep

Method Details

Gets the inverse of the geographic transformation step used to call this method or null if the transformation step is not invertible. The inverse of a transformation converts coordinates using the same method and parameters, but in the opposite direction of the original object. For example if the original object represents the NAD_1983_HARN_To_NAD_1983_NSRS2007_1 transformation, then the inverse will transform from NAD 83 (NSRS 2007) to NAD 83 (HARN).

Returns:
Type Description
GeographicTransformationStep Returns the inverse of the geographic transformation step or null if the transformation is not invertible.

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