[GRASSLIST:4436] Re: bug fixes for tcltkgrass for GRASS 5.3

[Paul Kelly]

On Thu, 30 Sep 2004, Hamish wrote:

>>>> BTW - what is the r.surf.idw2 for anyway when it is slower, less
>>>> universal and gives identical results. Strange... Ask Grass developers?
>>>
>>> I don't know what the difference is either.
>>
>> Can anybody say if there are any more diffrences between the r.surf.idw2
>> and *idw which justify both them being available?

They use two different algorithms. They should probably be merged into one 
module, and then either use a heuristic method to decide which algorithm 
is most appropriate for the data, or a command-line switch to determine 
the algorithm used. Kind of like s.surf.idw, which has a command-line 
switch to use a different algorithm from the default.