require(["esri/geometry/operators/support/GeographicTransformationStep"], (GeographicTransformationStep) => { /* code goes here */ });
import GeographicTransformationStep from "@arcgis/core/geometry/operators/support/GeographicTransformationStep.js";
esri/geometry/operators/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
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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 |
---|---|---|---|
The name of the class. | Accessor | ||
Indicates if 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
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isInverse
isInverse Boolean
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Indicates if the geographic transformation is inverted.
- Default Value:false
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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 });
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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({ wkt });
Method Overview
Name | Return Type | Summary | Class |
---|---|---|---|
Adds one or more handles which are to be tied to the lifecycle of the object. | Accessor | ||
Returns the inverse of this geographic transformation step. | GeographicTransformationStep | ||
Returns true if a named group of handles exist. | Accessor | ||
Removes a group of handles owned by the object. | Accessor |
Method Details
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Inherited from Accessor
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Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.
// Manually manage handles const handle = reactiveUtils.when( () => !view.updating, () => { wkidSelect.disabled = false; }, { once: true } ); this.addHandles(handle); // Destroy the object this.destroy();
ParametershandleOrHandles WatchHandle|WatchHandle[]Handles marked for removal once the object is destroyed.
groupKey *optionalKey identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.
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getInverse
getInverse(){GeographicTransformationStep}
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Returns the inverse of this geographic transformation step. 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 fromNAD 83 (NSRS 2007)
toNAD 83 (HARN)
.ReturnsType Description GeographicTransformationStep Returns the inverse of the geographic transformation step. Example// Get the inverse of the geographic transformation step for Tokyo_To_WGS_1984_2001 using its wkid let geoStep = new GeographicTransformationStep({ wkid: 108106 }); let inverse = geoStep.getInverse();
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hasHandles
InheritedMethodhasHandles(groupKey){Boolean}
Inherited from Accessor -
Returns true if a named group of handles exist.
ParametergroupKey *optionalA group key.
ReturnsType Description Boolean Returns true
if a named group of handles exist.Example// Remove a named group of handles if they exist. if (obj.hasHandles("watch-view-updates")) { obj.removeHandles("watch-view-updates"); }
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Inherited from Accessor
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Removes a group of handles owned by the object.
ParametergroupKey *optionalA group key or an array or collection of group keys to remove.
Exampleobj.removeHandles(); // removes handles from default group obj.removeHandles("handle-group"); obj.removeHandles("other-handle-group");