Provides access to members that control the dataset name for a grid-based transformation.
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Description
The IGridTransformation interface defines the parameters for a grid-based geographic (datum) transformation method. Currently, the NADCON and HARN (HPGN) methods for the United States are supported. The only parameter is the grid location and name.
Two functions are supported: Load and Unload. The transformation grids can range in size from 2-500 KB and are very expensive to access. The Load function places the requested grid into memory which greatly improves performance. Unload releases the memory.
Members
| Description | ||
|---|---|---|
 |
GetSpatialReferences | Returns the from and to spatial references for the transformation. |
 |
GridDatasetName | The name of a dataset containing gridded transformation values for a geographic area. |
|
Load | Makes the grid data available for transformation operations. |
|
Name | The name of the geographic transformation. |
|
PutSpatialReferences | Sets the from and to spatial references for the transformation. |
|
TransformMeasuresFF | Transforms floating point measures to floating point measures (or do the inverse). |
|
TransformMeasuresFI | Transforms floating point measures to integer measures (or do the inverse). |
|
TransformMeasuresIF | Transforms integer measures to floating point measures (or do the inverse). |
|
TransformMeasuresII | Transforms integer measures to integer measures (or do the inverse). |
|
TransformPointsFF | Transforms floating point points to floating point points (or do the inverse). |
|
TransformPointsFI | Transforms floating point points to integer points (or do the inverse). |
|
TransformPointsIF | Transforms integer points to floating point points (or do the inverse). |
|
TransformPointsII | Transforms integer points to integer points (or do the inverse). |
|
Unload | Releases any resources consumed by the grid data. |
Inherited Interfaces
| Interfaces | Description |
|---|---|
| IGeoTransformation | Provides access to members that define a geographic (datum) transformation. |
| ITransformation | Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on. |
CoClasses that implement IGridTransformation
| CoClasses and Classes | Description |
|---|---|
| HARNTransformation | Creates a HARN-based transformation. |
| NADCONTransformation | Creates a NADCON-based transformation. |
| NTv2Transformation | Creates a NTv2-based transformation. |