[OSM-talk] AND preview for India/China

[Nick Black]

Martijn - this looks fantasic - Especially when you zoom into Mumbai.
Great work so far.



On Dec 4, 2007 4:07 AM, D Tucny <d at tucny.com> wrote:
> On 04/12/2007, Martijn van Oosterhout <kleptog at gmail.com> wrote:
>
> > This afternoon I received the datafiles for India/China from AND and
> > I've put up a preview here:
> >
> > http://tile.openstreetmap.nl/indchi.html
>
> Cool!
>
> > You need to go to zoom level 9 and above to see the real stuff, but it
> > seems to have:
> > - Many many placenames, especially in India
>
> All the placenames in China are in their romanised form, does the data have
> the Chinese names?
>
> > - Lots of the major regional roads connecting the towns
>
>  For China at least, as mentioned previously, the roads are, at best, very
> very out of date... most expressways (motorways) are missing and the
> accuracy of the other roads is very low... Does the data have any more
> details on roads, such as names or references? That would make it easier to
> try and link them to real data... luckily though, the data is so sparse that
> merging shouldn't be an issue as long as there's a way to work out what
> should be linked where...
>
> > And the real surprise: A reasonable map of Mumbai:
> >
> http://tile.openstreetmap.nl/indchi.html?lat=19.090588725444515&lon=72.87749427275608&zoom=10
> >
> > There are also lakes and some rivers.
>
> The lakes, rivers and included coastline info looks way off, some of it
> might have been the way representing a long long time ago, the PGS data for
> the areas I've looked gives a much more accurate representation of those
> features... Also, at least one lake I've looked at looks very broken, only
> seems to have the south west corner of it's coast with the open ends
> seemingly just joined together to make a small slice of the lake..
>
> > For the china data there were some encoding issues, I'd appreciate if
> > someone checked that the accents are correct.
>
> There are only really accent on the romanised forms used in Xinjiang,
> pinyin, the romanisation of mandarin, can have accents to represent tones,
> but these don't seem to be present... I can confirm though that the accents
> on Ürümqi, the capital of Xinjiang look correct, pinyin would be Wulumuqi,
> or with tones, Wūlǔmùqí, chinese would be 乌鲁木齐.
>
> > At the moment I'm looking for feedback, though we really need people
> > who know the area well to give us an idea of how good it is. And
> > should contact the existing mappers to ask them how they want this
> > handled. But other than that we're off to a good start I think.
>
> I hope this feedback on the China data is useful... Would be good to see
> some examples of what data is actually in there... As it stands, the place
> info in the GNS data looks more detailed, if there's no more info in these
> files, it would probably be better for me to go back to working on getting
> that data together, I mostly stopped when we heard about the AND data...
> Water features seem to be better covered in the places I've looked by PGS.
> The road data itself seems to be just VMAP0 data...
>
> So, unless there is more data in the files that I'm not seeing on the map,
> we can get the same or better data from other sources with global coverage
> and that the only benefit to this data is that we already have tools to
> convert and import it... Would that be an accurate summary?
>
> d
>
>
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>



-- 
Nick Black
--------------------------------
http://www.blacksworld.net