require(["esri/geometry/support/GeographicTransformationStep"], (GeographicTransformationStep) => { /* code goes here */ });
import GeographicTransformationStep from "@arcgis/core/geometry/support/GeographicTransformationStep.js";
esri/geometry/support/GeographicTransformationStep
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
-
Parameterproperties Objectoptional
See the properties for a list of all the properties that may be passed into the constructor.
Property Overview
Name | Type | Summary | Class |
---|---|---|---|
Indicates with the geographic transformation is inverted. | GeographicTransformationStep | ||
The well-known id (wkid) hat represents a known geographic transformation. | GeographicTransformationStep | ||
The well-known text (wkt) that represents a known geographic transformation. | GeographicTransformationStep |
Property Details
-
isInverse
isInverse Boolean
-
Indicates with the geographic transformation is inverted.
- Default Value:false
-
wkid
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
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 |
---|---|---|---|
Gets the inverse of the geographic transformation step used to call this method or | GeographicTransformationStep |
Method Details
-
getInverse
getInverse(){GeographicTransformationStep}
-
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 theNAD_1983_HARN_To_NAD_1983_NSRS2007_1
transformation, then the inverse will transform fromNAD 83 (NSRS 2007)
toNAD 83 (HARN)
.ReturnsType Description GeographicTransformationStep Returns the inverse of the geographic transformation step or null
if the transformation is not invertible.