[OSM-talk] How to perfect the map

[OJ W]

I started doing a "checklist" of common features you might find around
towns.  It's not much of a techniques page yet, more hints on what to look
out for when mapping a town.

http://wiki.openstreetmap.org/index.php/Town_mapping

pages like that might be useful as a cheat-sheet for common tags in various
situations (e.g. another one for country mapping)


On Sun, Mar 23, 2008 at 3:23 PM, Chris Hill <chillly809 at yahoo.co.uk> wrote:

> I have tried to draw large buildings by walking around them.  This has
> problems due to access and problems due to losing the GPS signal in the
> signal shadow (canyoning). If you repeat this on different days the average
> sometimes helps but the building has to be large to not be swamped by the
> GPS inaccuracy - maybe Galileo will help in 4 or five years' time.
>
> I have also drawn a large, prominent warehouse by standing in line with a
> side, standing back many hundred metres and marking the point, repeating
> this at both ends of the each side (for a rectangular building you get 8
> points in total) you can then join these up in JOSM as guide lines, drawing
> the building where the lines cross and delete the guidelines - you need to
> load the GPX file directly into JOSM to see the waypoints.  This is also
> crude for a building, but for a large area that you can't gain full access
> to (such as a large industrial area) it can help.  Lots and lots of photos
> help a lot too.
>
> The best way overall is to trace the aerial photos and probably the only
> way for buildings with a complex shape, but in the area I'm interested in
> Yahoo! are low-res and not much use for fine detail.
>
>
> cheers, Chris
>
> ----- Original Message ----
> > From: Lars Aronsson <lars at aronsson..se>
> > To: talk at openstreetmap.org
> > Sent: Sunday, 23 March, 2008 10:47:10 AM
> > Subject: [OSM-talk] How to perfect the map
> >
> [snip]
>
> > All the wiki pages on "map features" describe how to add
> > denomination to an amenity=place_of_worship, but don't say when
> > a church should be drawn as a dot amenity or when the outlines of
> > the building (and surrounding park) should be mapped in detail. I
> > think we should make wiki pages that start with real world objects
> > instead of tags.
> >
> > Is there any written description for that kind of detailed
> > mapping?
> >
> > Do you print out the OpenStreetMap at zoom=17 of a few city blocks
> > and bring it with you to check all the details?  Or can you run
> > JOSM on a PDA while walking around?
> >
>
>
>
>
>
>
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