Welcome to OSM :)

Editing the map so that everybody can benefit is the whole idea of OSM. Working on private map data is only usefull/necessary in niche corner cases you’re probably not interested in.

You can wait until your OSM changes trickle down to your Garmin the usual way, or you can download more frequently-updates maps or even make your own.

Concerning your changes, you probably want to add layer=-1 to your tunnel. I also see that some of your ways seem to end nowhere. Make sure to connect them to the rest of the network if applicable.

It’s arguably not worth maping the “inacessible because of snow” bit, unless it is quite regular and predictible. In that case, you could use time-based conditional access but I’m not aware of a routing engine that actually uses that info.

Try finding current ones using http://zverik.osm.rambler.ru/whodidit/?zoom=7&lat=0.88122&lon=114.25824&layers=BTT (you can set up an rss link too) or http://resultmaps.neis-one.org/oooc?zoom=7&lat=1.24744&lon=115.9274&layers=B00TFFFFFT

For some reason, there seem to be a lot of overenthusiastic railway mappers who have a looser view of “it exists” than other mappers.

I try to be conservative and understanding when deleting stuff, but when I see tracks going thru buildings or swamps perfectly visible on Bing, it casts a shadow over the rest of the user’s contributions.

Very nice and usefull writeup, thanks.

s/suggestive/subjective/ excuse by bad English.

There are many slightly different opinions on help.o.o.

My POV is that

• The usual “tag the dominant use” rule applies.
• Since living quarters tend to “sneak in” avery building but not the reverse, and because shops are arguably more interesting to map viewers, commercial/retail/office should probably get a bit of priority over residential.
• It’s all a bit suggestive anyway, don’t worry too much.

Thanks for sharing. The indexes are good hints, even though which ones you need depend on your stylesheet, and some of them look quite heavy-handed :p For the PG settings however :

• sync_commit=off and fsync=off are a bad idea unless you’re ready to delete and rebuild your whole db every now and then. Definitely not for everyone.
• similarly, random_page_cost=1.1 is only for SSD users.
• changing kernel.shmmax does nothing for performance : it’s either high enough or not, and if running PG>=9.3 you probably don’t need to touch it. I guess you mean changing PG’s shared_buffers ?
• I never measured a need to change wal_buffers. Increasing checkpoint_segements and checkpoint_completion_target however is nearly always usefull.
• for an insert-rarely db it might make sense to run vacuum only after each data import, otrherwise you really shouldn’t disable it or even make it more aggressive.
• On the subject of analyze, raising default_statistics_target can be very usefull.
• Have you tried pgfouine or pgbadger before writing your own log analyzer ?

Even though it is redundant, I still think it’d be a good idea to link to that page from the main page (next to the attribution/donation links), because it makes it more discoverable :

• By third-parties using osm data, who can see a best-practice example of what to put on their own site.
• By casual non-contributing visitors, who can miss the other links because those aren’t in the format / location they expect,

The message is complete, it translates to “I’m overloaded and can’t provide your image immediately. Comme back later, it should be ready…” and is displayed when the rendering server can’t keep up with current demand.

It’s normally quite rare to see that replacement image, so I don’t think that it has been made translatable.

You are viewing the humanitarian map layer, which happens to be rendered on servers from osm France, so that message is in French. Other layers might use a different error image, for example the opencyclemap layer displays its logo with a “more osm comming soon” message.

Tips depend on what you are mapping.

• I tried fastdraw and found it worse than stargitforward add or using improve way accuracy on a big line.
• For houses I use extrude all the time, it is faster than tracing the outline and orthogonalyzing at the end
• For lakes there are tracing plugins, but it’s only worth your while if you have homogenous imagery and many things to trace.
• I typically trace 10-50 elements in a row without adding any tags, and then use the search dialog to select them and tag them all in one go. That leads to tracing objects by type instead of by area.
• Some other tools you should try if you didn’t yet: terracer, contour merge, merge overlap, replace geometry
• I use the download continuously plugin all the time after the initial download. I have it off by default (I quickly toggle it when I need some data somewhere), and I have tweaked it to download with a generous margin but only at high zooms.
• I use a trackball (that one) which I find greatly superior to mice: just as precise/fast if not better, no need for a “proper surface” of any kind, doesn’t induce RSI in my wrist, and a single AA battery lasts years.

The usual counter-argument to “wait until edits are made to allow potentialy spamy features” is that spamers will end up automatically doing an edit to unlock the features… Which would be even more damaging to OSM.

One thing I would like to see is deleting contribution-less accounts after a while (say 6 months), automatically and with a notification message. It’s not as good a spam filter, but it should avoid the arms race.

The other avenue of work, as Tordanik suggests, is to make it easyer for any contributor to flag bad accounts / contributions. Maybe the admins will need to recruit more spam-deleters/; I’m sure they’ll let us know if they get overworked.

Kudos to the JOSM devs. Keep it up :)

@kucai You can pre-load an area by moving around, and then untick “auto-load tiles” when you go offiline. I suspect that any script to do this automatically would violate Bing’s usage policy.

The tool that a_peter describes requires the “measurement” plugin. Install it by going to edit -> preferences -> plugins.

We’ll only get more spamers as osm gets more popular. We just need to keep improving the tools to fight it, such as new contributor tracking, changeset analyzers, and reverting tools. Otherwise it’ll burn through spamfighters’ energy.

I may be wrong here, but I assume the contributor base will grow faster than the spamer base. We’ve seen a recent spurt of spam, but give the community some time to react.

Obligatory xkcd quote

There are different levels of unwanted contributions in osm:

1. Outright spam like that search engine example.
2. Spam within a proper contribution, like adding a shop’s sales pitch in the note tag.
3. Grey areas, like a buisiness on the map where at most a letterbox is to be found.
4. Newbee mistakes and accidental vandalism, like deleting stuff to fit a one-time use
5. Normal errors, like bad tagging
6. Actual vandalism, like doodling on the map or puting a joke name on an actual feature
7. Edit wars on politically-disputed land

Each of those should be handled a bit differently, but the tools to handle them are probably the same (except perhaps 5 and 7).

Champagne !

Welcome back, hope you like the progress made in two years :)

Well done, one often forgets the power of the changesets manager.

Not scaring new contributors away with a “you’re doing it wrong” message is very important. Some rules of thumb I use :

• Be welcoming, thankfull, jovial.
• Dont blame; label even attrocious mistakes as “things you could improve”.
• Offer to help or explain further, and talk about alternate help sources (this link).
• Fix the badly damaged or hard to correct bits yourself.
• Explain (with wiki links if applicable) how to fix the rest (and fix it yourself after a week or two if there’s no reaction).
• Finish on a “happy mapping” good-bye note.

Concerning those particular Aldi notes, even if the text was taken from the Aldi website, there’s no reason to think that a Google map (or other copyrighted source) wa used to place the notes (unless the osm map is really bare in the area ?). If you could place those notes yourself by reading the text on the Aldi website, then those notes are fair game.

That last sentence is, in effect, independant verification. You might wonder what the advantage of such notes are if you need to redo all the detective work by yourself, but they actually provide 1) a hint of what to look for and what users are interested in 2) a feedback link to users who aren’t full contributors but will see that OSM contributors are areactive, and spread the word.

Hum, autant pour moi, j’ai du me faire avoir par le cache, le rendu par défaut n’affiche plus les stations.

Cela m’étonne que ce rendu ne gère pas le nom sur les public_transport=stop_position. Peut-être le ferait-il pour les stations, mais celle-cis ne sont pas mappées sur Paris. À voir si on veut poster un bug de style, ou rajouter l’ancien tag pour garder la compatibilité avec les vieux outils.

Sur quel rendu ? Sur le rendu par défaut ça a l’air correct.

Si problème il y a, il viens sans de ce changeset. Le seul truc qui pose peut-être problème est la suppression de railway=station, mais le reste a l’air de suivre le schema public_transport donc je n’ai pas l’impression qu’il y ai un bug.