[GRASSLIST:7655] Re: surface interpolation

[Maciek Sieczka]

From: "Paul Kelly" <paul-grass at stjohnspoint.co.uk>

> Hello Maciek
>
> Maciek Sieczka wrote:
>> Although the vector engine of Grass 5 is much worse than in 6, v.patch 
>> plays
>> the role fine there, being able to populate attributes from input to 
>> output
>> properly.
>
> I'm not sure I agree; can you explain in more detail? As I understand it 
> the 5.4
<snip>
> If elements in the two different vector maps being patched have the same 
> category numbers but those category numbers have different attribute 
> values (either strings or decimal numbers) associated with them in each 
> map (i.e. the two maps have different dig_cats files), then the attribute 
> values in the second map are lost and those from the first map are used in 
> the output map. So v.patch does nothing to avoid category number clashes 
> between the two maps.
> As I understand it. Haven't worked with this for a while though.

It's been a while since I have used 5.4 for the last time. That's how I 
recall v.patch working in 5.4 but might be in error here. Sorry, you'd have 
to check it yourself,
it is very unlikely I will have time to do it within next few days.

Maciek