[wellylug] Topo data

[Wood Brent]

--- "E.Chalaron" <e.chalaron at xtra.co.nz> wrote:
> I understood that Landcare produced a very accurate DEM (~25 m) of all NZ? 
> Am I wrong and if not how available is this ?

I have heard that also, but not seen it. Of all the CRI's, Landcare seems the
one most interested in masking such work freely available. Most others are
really trying to make as much money as possible from everything they do, which
is pretty much the model the Govt has imposed on them.

The LINZ data is NOT a DEM. It is vector data representing topographic
features, incl roads, rivers, etc. The elevation contour vector data included
in this can be used to build pretty reasonable DEM's if required.

> I am not sure that any other countries has done that yet.... 25 m !!!!!!

It is a pretty great achievment if so. I'd like to know if that is 25m
horizontal or vertical (or both). 

> 
> > You might want to check that they are happy with their data being
> > redistributed for free. I don't think they'd be too happy about that and it
> > doesn't sound like their intention.
> 

LINZ in currently running beta2 of their Topoonline web site, to allow anyone
to download (for free) small areas of the same topo data. It woul be a major
job to download the whole 12Gb piecemeal & merge them back into the original.

The issue IMHO is not LINZ being concerned, as my discussions suggest they are
quite comfortable with the idea. It is the commercial data reformatters who
make $$ from their added IP that we would be competing with, if anyone.

Cheers,

  Brent Wood