[GRASS-user] Georeferencing a vector onto a WMS layer

[Jacki Pilon]

Well, I start with a CSV file containing records of  numbered things
(houses, parcells...) having a noun (a proper noun) and X, Y coordinates
values. These names and locations have been recorded from an old paper map
(X and Y are in millimeters). The geographic coverage of the map is small
(around 2 x 3 km, printed onto a 210 x 300 mm page).
The map shows hundreds of things worth being recorded.
I would like to georeference this set of "things" in order to display them
in position, overlaid on a general map.
A few of them (for example chapels, churches, crossroads...) can be
relatively easily located on modern, georeferenced, maps and hence, be used
as ground control points.
I first build a vector layer in importing this ascii file in QGIS, and I
could see a correct result, points at relative good positions and labels
with the nouns.
But now, I have troubles in using the QGIS georeferencer, as it seems to
accept only rasters (not vectors) and these rasters are supposed to be
files from the computer. I would prefer to use a VMS multilayer map that
would allow to take benefit of more than one single layer  in the process
of defining the ground control points.
.
Thanks for your attention and for your help.

Jacki

Le dim. 19 août 2018 à 11:31, Moritz Lennert <mlennert at club.worldonline.be>
a écrit :

> [Please keep discussions on the list.]
>
> Am 18. August 2018 20:59:03 MESZ schrieb Jacki Pilon <
> jacki.pilon at gmail.com>:
> >Thank you Moritz. Unfortunately I cannot go further since I have bad
> >responses from the OSM servers like :
> >https://osm.geobretagne.fr/gwc01/service=wms
>
> You will have to be much more precise about what exactly you do and what
> exactly are the messages you receive.
> Otherwise it will be difficult for anyone to help you.
>
> Moritz
>
>
> >Yours,
> >
> >Jacki
> >
> >Le ven. 17 août 2018 à 13:01, Moritz Lennert
> ><mlennert at club.worldonline.be>
> >a écrit :
> >
> >> On 17/08/18 07:58, Jacki Pilon wrote:
> >> > Bonjour,
> >> > I coudn't find a way to georeference a vector (with arbitrary X Y
> >> > coordinates) by using either a WMS or a  raster layer. Any advice ?
> >>
> >> https://grass.osgeo.org/grass74/manuals/g.gui.gcp.html
> >>
> >> It allows you to georeference a vector. If you want to use a WMS as
> >> background you probably have to import it first using r.in.wms.
> >>
> >> Moritz
> >>
> >>
>
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