Interpolation means the calculation of unknown values between known values of the same variable. The same variable acts as an exploratory variable in the given locations and is in the role of a dependent variable between the given locations. Interpolation is possible in geographical space and in feature space regardless the number of dimensions. 
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ID  P  Question or exercise  

3970  1  What is the expected salinity in location given by coordinates 6512659; 474663 if the measured salinity in locations with coordinates 6512029; 468463 and 6513290; 482650 is correspondingly 4.1 ‰ and 0.4 ‰. Let’s use inverse distance weighted interpolation.  Open 
3937  3 

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4140  3  The worksheet andmeid_pole in the attached file contains names and coordinates of 13 Estonian weather stations with missing snow cover duration data. Predict snow cover duration for these stations using the observed data from other stations in the same worksheet using Inverse distance weighted interpolation.

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