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How does surface interpolation in ArcGIS Pro work?
Surface interpolation tools make predictions from sample measurements for all locations in an output raster dataset, whether or not a measurement has been taken at the location. There are a variety of ways to derive a prediction for each location; each method is referred to as a model.
What can interpolation be used for in a raster?
Interpolation predicts values for cells in a raster from a limited number of sample data points. It can be used to predict unknown values for any geographic point data, such as elevation, rainfall, chemical concentrations, and noise levels.
How is interpolation used to create an elevation surface?
A typical use for point interpolation is to create an elevation surface from a set of sample measurements. In the following graphic, each symbol in the point layer represents a location where the elevation has been measured. By interpolating, the values for each cell between these input points will be predicted.
What are the deterministic methods of interpolation?
The deterministic interpolation methods assign values to locations based on the surrounding measured values and on specified mathematical formulas that determine the smoothness of the resulting surface. The deterministic methods include IDW (inverse distance weighting), Natural Neighbor, Trend, and Spline.
How are interpolation tools used in the real world?
Available with 3D Analyst license. The Interpolation tools create a continuous (or prediction) surface from sampled point values. Visiting every location in a study area to measure the height, concentration, or magnitude of a phenomenon is usually difficult or expensive.
Which is the best interpolation tool for hydrologic analysis?
Kriging is a geostatistical method of interpolation. The remaining interpolation tools, Topo to Raster and Topo to Raster by File, use an interpolation method specifically designed for creating continuous surfaces from contour lines, and the methods also contain properties favorable for creating surfaces for hydrologic analysis.