[OSM-talk] AND preview for India/China

[D Tucny]

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very out of date...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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