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#1
CartoCanuck

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My course this semester is Surface Modelling and we are learning about Interpolation Methods at the moment with the use of the Spatial Analyst Extension. I've read as much as I can so far about the differences between IDW, Spline, Natural Neighbour and Krig. 

 

What is the best method for modelling both hilly elevation and flat terrain?  I know it all depends on what I am trying to model, but are the methods used for certain types of data?



#2
frax

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Modelling from what? I think you rarely (nowadays) have point measures to create a DEM from. You are more likely to use a TIN to increase resolution, I think.

 

What method you use depends more on how to handle outliers and extremes in point measurements, I think.

 

Those methods you mention, I am thinking they are more for cases when you have e.g. point measures of a continuous parameter (pollution, temperature etc) and you want to create a surface out of those.


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#3
CartoCanuck

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Yes, I agree with you, I haven't read anything about using those methods for different types of elevations - but I still need to find the information for a question in my module.

 

So, would you say none of them? And if so, what methods, if any could I use to interpolate different elevations?



#4
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I'd probably use a TIN to interpolate elevations


Hugo Ahlenius
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