[Talk-in] Mapping Party howto document

Guillaume Audirac guillaume.audirac at gmail.com
Thu Nov 26 06:02:09 GMT 2009


Hello Sajjad,

where is the map you created?
>>
> The map is here
> http://www.openstreetmap.org/edit?lat=11.32007&lon=75.93383&zoom=17
> But this is the first attempt, hence the map is incomplete, the quality of
> work is very poor. The document is a step forward to improve the quality.
>
>
Indeed the quality is poor, but I guess you have subscribed to this mailing
list to improve it ?
OpenStreetMap is a great project, but it requires initially a deep dive in
the wiki (http://wiki.openstreetmap.org/wiki/Main_Page) to understand what
to do, what to avoid. To understand also that it may take a few hours for
your changes to be updated on the Mapnik rendering (or more depending on the
zoom scale), to understand that you should not tag for the rendering but to
reflect the reality. Try to see what others do in some nicely-mapped area.
And feel free to ask your questions or doubts on the mailing list.

Some useful tool like KeepRight can help you to fix some basic mistakes
(updated once a week I guess):
http://keepright.ipax.at/report_map.php?db=osm_XD&zoom=16&lat=11.31964&lon=75.93473&layers=B00T&ch=0&show_ign=0&show_tmpign=0
(the Permalink allows you to bookmark a specific location in updating the
URL)

You can also use JOSM and the validator plugin to check the basic errors
before uploading.
Some mistakes are very basic and cannot make use of the map for routing
purpose for example: crossing roads with ways not connected. Or they are
unappropriate like building=yes on a single node (use a closed-way for this
tag) or replace it with landuse=residential for example.
Refer often to the *Map Features* page to know the most common tags and
attributes: http://wiki.openstreetmap.org/wiki/Map_Features, and also how to
combine them.

I personally don't try to map everything and everyday, but what I find
useful for me and others.

Greetings,
Guillaume
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