[OSM-talk] OSM very old data

[Tom Ka]

Hi, I tried to convert the old 0.3 data and have some questions if
anybody remembers those days:
(all data are from https://planet.openstreetmap.org/cc-by-sa/ )

1) planet-061205.osm contains (other have similar too):

<way id="224552" timestamp="2006-04-30T20:50:06+01:00">
    <seg id="0" />
    <seg id="0" />
    <seg id="0" />
    <seg id="0" />
    <seg id="0" />
    <seg id="0" />
    <tag k="created_by" v="JOSM" />
</way>

the 04to05.pl end with:

<way visible="1" timestamp="2006-04-30T20:50:06+01:00" id="224552">
    <nd ref=""/>
    <nd ref=""/>
    .....

which is not valid for osmosis0-0.35 to further process it. What it
the meaning - deleted segments, so should I ignore those ways?

2) from 061205 the size increases, so I guess it contain some
reasonable data, but for older (planet-061128.osm.bz2 -
planet-060818.osm.bz2  ) there is size jump, which is strange. Is
there any reason for this?

I must admit, this OSM archeology is a sort of fun :-)

I already have tiles for old CZ maps up to 2007.10.10, have to prepare
some better UI, can have a look here:

https://kasparkovi.net/osm/
(top letf selection for older maps)

Bye tom.k

po 28. 10. 2019 v 10:07 odesílatel Tom Ka <tomas.kasparek at gmail.com> napsal:
>
> Thank you, I was thinking about similar way too.
>
> Best tkk.
>
> so 26. 10. 2019 v 23:22 odesílatel Frederik Ramm <frederik at remote.org> napsal:
> >
> > Hi,
> >
> > On 25.10.19 16:18, Tom Ka wrote:
> > > OK, one question that remains unanswered will be: what was the first
> > > object in Czech republic :-)
> >
> > Nodes are generally numbered in ascending order, and have been from the
> > start. Since anything that can be mapped either is a node or depends on
> > a node, it should be possible to find the node with the lowest node id
> > in the Czech Republic.
> >
> > I'll offer https://www.openstreetmap.org/node/172508 - the web site says
> > "Version #1 · Changeset #209315 - edited Tue 06 Feb 2007". At the same
> > time this node is already present in the file called
> > "planet-060501-FromLA2.osm.bz2" which purports to be from May 2006.
> > Subtract 8 from the node ID and you get a node where the API claims it
> > was first edited in August 2005, so something is a bit fishy here with
> > regards to the exact timestamps. Nonetheless, 172508 seems to be the
> > lowest node ID in the country. Incidentally it is still the lowest node
> > ID in the country today, but it is also the lowest node ID in that old
> > planet file.
> >
> > Bye
> > Frederik
> >
> > --
> > Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"
> >
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