[GRASS-user] Advice on georectification procedure

[Stuart Edwards]

If you have a good coastline map, can you just geo-rectify the new map to it using coastline features as GCPs?  Then it'll have the same projection as the coastline layer and you can re-project it to your working projection.

Stu
 
> On May 13, 2016, at 10:14 AM, Eric Patton <thepattonian at gmail.com> wrote:
> 
> 
> 
> On Fri, May 13, 2016 at 10:48 AM, Anna Petrášová <kratochanna at gmail.com <mailto:kratochanna at gmail.com>> wrote:
> >> I'm not sure if I am going about this the correct way.
> >
> >I don't have too much experience with this, but I think it's a good
> >approach. But you also need to know the ellipsoid, not sure if that
> >could cause the misalignment.
> >
> >Anna
> 
> 
> Thanks, I have assumed WGS84, where the map was made in 2002; I'll also try NAD27 as that is not uncommon in the region.
> 
> -- 
> Eric 
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