Am 10.09.2010 09:15, schrieb Marco Lechner - FOSSGIS e.V.:
Hi Peter,
I'm always talking about the (or a) history-dump.
Okay, then we're talking about the same thing.
on
the other way (importing into simple-history-schema) the visibility
isn't availiable at all.
Please don't consider the simple-history-schema being final or sth. I
might add the visibility column on Sunday or maybe next week.
The reason for that is, that these schemas or
their root didn't have the necessity to take care of the visibility,
because they were focussing on dumps at a certain point in time and
therefore contained only visible entities.
The simple-history-schema is targeted on holding all information
including history, and this includes the visibility flag. I just did not
come to the point of implementing handling of deleted elements.
I focused on reading ways and building intermediate versions of them but
even this is not finally done and still buggy.
> the problem occurs at both schemas.
right now -- yes. But the history thing is quite young and pre-alpha
with a lot of missing features.
The main reason for it is, that osmosis doesn't take care of the
visible-attribute anyhow. This can be shown easily by reading an osm.xml
(including the visibility-attribute) and writing it without any
filtering- or bounding-taks. The results differ, because the written xml
is deprived of its visibility information.
Yes this is true because of the reasons mentioned at [1]. To solve this
we'll need to introduce a whole set of different tasks that extends the
functionality of the bounding-box and filter tasks to respect the
visibility-flag. As long as Brett doesn't give his go to it, I don't
plan to change the osmosis source to include the visibility flag but
instead write my own tasks for this.
Peter
[1]
<http://lists.openstreetmap.org/pipermail/osmosis-dev/2010-August/000707.html>
_______________________________________________
osmosis-dev mailing list
osmosis-dev@openstreetmap.org
http://lists.openstreetmap.org/listinfo/osmosis-dev
