OpenStreetMap
Elevations mass editing
Publeyêe per Cascafico lo 13 March 2018 en Italian (Italiano). Dèrriére betâ a jorn lo 14 March 2018.Update: comments pointed out that such edits are against the code of conduct, even if not automated. I leave this post just as personal hint on queries and regexp’s.
It happens there’s a lot of OSM tags “ele”=” m" that can't be processed by useful queries like [find volcanoes between 1000 and 2500 meters high](http://overpass-turbo.eu/s/wXw)
How I remove unit of measure:
- download faulty data with this generic overpass-turbo query
-
from export menu, “download/copy as raw OSM data”
- load resulting .osm file in Notepad++ (or whatever regexp editor)
- find&replace (CTRL+h) twice with the following fields:
find: k=”ele” v=”(\d+(.\d+)) m” will find for example “450.5 m”
replace: k=”ele” v=”$1” will replace “450.5”
find: k=”ele” v=”(\d+) m” will find for example “450 m”
replace: k=”ele” v=”$1” will replace “450” - load in JOSM modified .osm file
- select all (CTRL+a) and add a fake tag (ie: pippo=pluto) to every node and remove it (just a shortcut to add “modify” tag to elements, otherwise you won’t be able to upload anything
Remember to add proper changeset comment.
Discussion
Comentèro de mmd lo 13 March 2018 a 17:39
It’s really not necessary to remove the trailing „m“ in Osm data for overpass turbo to work. Instead you should convert the relevant ele tags to a number. Roland wrote a blog post about this topic which explains all the details!
http://dev.overpass-api.de/blog/numbers.html
Comentèro de Cascafico lo 13 March 2018 a 19:31
Thanks a lot! I will read carefully those queries (I didn’t know there were a blog about overpass-turbo).
Comentèro de FeRDNYC lo 14 March 2018 a 08:08
And it seems that when someone tried to mass-edit elevations to remove “ m” suffixes last year, those edits were reverted with a link to the Automated Edits code of conduct.
See e.g. the history for the elevation example in that blog post, the Sickersberg.
Comentèro de Cascafico lo 14 March 2018 a 09:45
Thanks for this info! Actually I didn’t think my mass edits falled in “automated” category mentioned by the code of conduct you quoted.
I hope somebody will document the precious overpass.turbo syntax that “overpass” :-) mixed value notations.
Comentèro de mmd lo 14 March 2018 a 12:53
If you take a look at the scope of said Automated Edits code of conduct, you’ll notice that your blog post exactly matches point 4 in the scope section:
“use of find-and-replace functionality using a standard editor such as JOSM or finding using services such as Overpass API and changing without reviewing cases individually”
Comentèro de Cascafico lo 16 March 2018 a 10:14
Yes, after your hint I red the whole article; what I ment is that title “Automated edits code of conduct” was misleading. I had a different idea of “automated”.