[josm-dev] Moving 400km south with Lambert projection

[Pieren]

This is because you try to work simultaneously on two different
Lambert Zones, which is not possible.

The problem is the ferry routes from Bastia to the french riviera or Italy.
Those long north-south ways are exceeding the "Lambert Zone 4" limits
used for Corsica. Then when you download data, the projection is
automatically selected on the first node to be displayed by JOSM which
is in the wrong zone in your case (the north points of the ferry
routes in zone 3 instead of zone 4).
This is also explaining why it worked on other places in Corsica. If
you don't try to donwload the ferry routes, it works fine.
Such issues will be solved mid of this year because the french WMS
will replace this old projection (Lambert Zone) by another one
(Lambert93) which is covering the whole country at once (including
Corsica). This will imply a new projection implementation in JOSM as
well.
What I would recommend in the mean time is to split the ferry routes
in smaller parts using JOSM with another projection of course (EPSG or
mercator).

Pieren

On Sun, Feb 1, 2009 at 5:07 PM, Thorsten Feles <onelist at gsmnetze.de> wrote: