kriging in ArcGIS

What is Kriging?

Kriging is an advanced geostatistical procedure that generates an estimated surface from a scattered set of points with z-values.?

An Kriging assumes the distance or direction between sample points reflects a spatial correlation that can be used to explain variation in the surface.

The Kriging tool fits a mathematical function to a specified number of points, it is a multistep process, includes exploratory statistical analysis of the data, variogram modeling, creating the surface, and exploring a variance surface.

Kriging Methods–

There are two kriging methods:

1. Ordinary kriging– is the most general and widely used of the kriging methods and is the default.
2. Universal kriging– assumes that there is an overriding trend in the data, and it can be modeled by a deterministic function, a polynomial.

Perform kriging Interpolation in ArcMap

Interpolates a Raster surface from points using an Kriging technique.

Steps :

1.Open ArcToolbox, expand Spatial Analyst Tool > then expand Interpolation and select Kriging.

2. Kriging window appears, select Input point features data (Interpolation_Data), Z value field select Elevation, then choose Output raster destination. Select Kriging method – Ordianary and choose Semivariogram model. Finally, click the OK button.

Now show to your Kriging result in ArcGIS Map View.