Hi,
As an archaeologist, I do that a lot. You will need to scan the map to create
a .tiff. The you use the qgis georeferencing plugin to place the map in the
correct spot.
http://www.qgistutorials.com/en/docs/georeferencing_basics.html
This should help. Also look at the qgis documentation.
http://docs.qgis.org/2.14/en/docs/user_manual/
If you overlap polygons or two rasters, play with the layer rendering and
transparency found in the layer properties.
Cheers
Nicolas
> Le 10 nov. 2016 à 06:22, Pat Hin [via OSGeo.org]
> a écrit :
>
> Hello guys
>
> i am a private researcher who is analyzing where some former old
> buildings has been
> most surely been located.
> For that of course i have sometimes just a very old map (sometimes a
> picture or a scan).
>
> How would be the best way to "overlap" this with a modern map like OSM.
> I am sure i have to create two layers and the layer for the modern map
> is easily to do
> with the plugins.
> But how to process the "old" map the best way: would do you recommend to do?
>
> many thanks
>
> pat
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