Spline
Feature Description
The Spline interpolation method uses mathematical expressions of minimal surface curvature to simulate smooth surfaces passing through a series of sample points.
- The source dataset for interpolation must contain a numeric field as the interpolation field.
- Spline interpolation is suitable for calculating interpolations with large numbers of sample points while requiring smooth surfaces. More input points for interpolation result in smoother generated surfaces. Simultaneously, larger point counts lead to longer processing times for output rasters.
- The Regularized Spline Function method creates gradually smooth surfaces using values that may lie outside the sample data range. The Tension Spline Function method controls surface stiffness based on modeled phenomenon characteristics. It creates less smooth surfaces using values more strictly constrained within the sample data range.
Parameter Description
| Parameter | Default | Description | Type |
|---|---|---|---|
| Source Dataset | The Point Dataset To Be Interpolated | DatasetVector | |
| Field | The Field Storing Numerical Values (Elevation, Precipitation, etc.) For Each Point. Text-Type Fields Are Not Supported. | String | |
| Scaling Ratio | 1.0 | Scaling Factor For Interpolation Field Values. Multiply Source Field Values By This Ratio Before Interpolation. Example: Ratio=2 Doubles Raster Values. Typically Set To 1. | Double |
| Target Datasource | Datasource For Storing Result Dataset | Datasource | |
| Result Dataset Name | Name Of Result Dataset | String | |
| Pixel Format | Pixel Format | PixelFormat | |
| No Value | 0.0 | NoData Value | Double |
| Search Method | No Search | Method For Selecting Points During Interpolation | SearchMode |
| Expected Points (Optional) |
0 | Expected Number Of Points To Participate In Interpolation | Integer |
| Search Radius (Optional) |
0.0 | Radius For Searching Participating Points | Double |
| Maximum Points (Optional) |
0 | Maximum Points To Use During Block Search | Integer |
| Max Points Per Block (Optional) |
0 | Maximum Points To Search Within A Single Block | Integer |
| Resolution | 0.0 | Spatial Resolution Of Result Raster (Ground Area Per Pixel). Unit Is Consistent With The Dataset Unit. | Double |
| Smoothness | 0.0 | Smoothness Factor, Value Range [0,1] | Double |
| Tension | 0.0 | Tension Factor | Double |
| Result Extent (Optional) |
Geographic Extent For Interpolation Analysis | String |
Output
| Parameter | Description | Type |
|---|---|---|
| Result Dataset | Raster Dataset Generated By Interpolation | DatasetGrid |