Hola 777L. OSM es básicamente una base de datos con muchos subproductos; el más notorio es el mapa, pero también hay georeferenciadores (nominatim), motores de routeeo (osrm, graphhopper, etc) y miles de demases.

Así que la primer pregunta es: qué tienes en mente?

the goog doesn’t actually index its own issue tracker

And you have to have a google account to even read that. I wonder what it says…

Translation is always done at phrase level, as words in most languages are not context free. For instance, the classic example, free, can mean free as in speech, or free as in beer. many words in English can be a noun or a verb (ditch) or even more examples.

for f in ‘ls /data2/losangeles/seq01/*.JPG’; do mogrify -gravity South -crop 4000x2200+0+0 $f; done

You don’t need to run ls to get a list of files, just give the glob itself:

for f in /data2/losangeles/seq01/*.JPG; do mogrify -gravity South -crop 4000x2200+0+0 “$f”; done

If you have spaces or other stuff in the paths, escape them accordingly. And never forget to double-quote variable expansions, so spaces don’t break the parameter parsing.

maybe the US-based Slack

I guess you mean https://osmus.slack.com/, right? I found it in osm.wiki/List_of_OSM_centric_Slack_workspaces

Sounds better than what I thought. And if they ever build an AI that can solve it, the we won! :-P

Good point, but I still think we could help OSM and provide an alternative to the proprietary and mechanical-turk-for-free reCAPTCHA.

Apri’s fool!

Hola Stela. ¿De qué forma te resultó difícil? ¿Qué estabas tratando de hacer? No entiendo la referencia a “lo solicitado” ni al río. Si contás un poco más capaz podemos ayudarte.

@woodpeck: well, the fact is that I’m using –slim, but also –drop, because of my space constraints. And thanks for the info about relations, in this case I didn’t have any problem because there are no relations with a castle_type tag.

@joost: yes, in fact, so far the tool has no way to guess the original river’s flow direction (the riverbanks do not contain that info) and in any case with branches, ST_ApproximateMedialAxis() returns LineStrings with almost arbitrary direction. At least the segments the tool adds are consistent with the direction of the LineStrings they’re added to.

@imagico: re: exploding cases: I don’t need to find a huge riverbank to see the algo meltdown, with the last segment of the Rhône river is enough. I tell you, the skeleton and resulting medial are not pretty and bordering the useless. I’m playing with the idea of some polygon simplification at the end of the processing pipeline and polygon partitioning at the beginning.

@Warin61: Also, remember this is just a tool for generating the centerline. If I ever use it to import into OSM, it will surely be with a note of ‘check this actually makes sense’. @imagico’s idea of a Josm plugin is most probably the outcome.

De nuevo, depende mucho de qué dato s tenés y qué licencia tienen. Es un tema al que se le presta mucha atención; es el motivo por el cual por ejemplo no se pueden tracear datos a partir de las imágenes satelitales de google.

Googlestreetmaps? Estás mezclando cosas… :(

Si tenés datos que has obtenido de alguna forma y que pueden agregados a Open Steet Map, habría que ver primero qué licencia tienen esos datos y si son compatibles con los de OSM y sus usos.

However JOSM has a very useful “Download from Overpass API” feature

Also, what’s the name of the plugin who provides this?

What about just extending a previously existing relation? Should we just remove the filter in the second line? Another thing very common in Europe is very long rivers that go through several countries, hence having different names. The most clear example, the Danube, has all these names:

• Danube
• Donau
• Donau - Dunaj
• Duna
• Duna / Dunaj
• Dunaj
• Dunărea
• Dunărea - Дунав
• Dunav
• Дунав
• Дунай

Hola Ivana, bienvenida. Sólo un detalle: OSM no es una herramienta para editar mapas, es un proyecto que busca recopilar información necesaria para producir mapas. Para ello hay varios editores que pueden modificar dicha info; cuando haces una modificación, ésta queda registrada y se propaga a todos aquellos que usan los datos. Espero haber aclarado un poco el verdadero objetivo del proyecto.

It’s very nice, but I noticed that the colored border for one way streets are on the left side of the street, which looks weird to me. Probably a centered version? Is there a tag for left_or_right hand driving in OSM?

Another thing that makes the style somewhat unreadable on terms of roads is the pastel colors used to draw them. That’s why trunks get confused with parks and motorways with rivers, and that’s what lead me to do my own style and rendering: trying to use the standard tiles for navigation in my phone, in my car, in broad daylight, with sunglasses; or at night, was unfortunately bare useful.

Your approach essentially has two major problems:

• The USGS 1 arc second files contain bad quality void fill in some tiles that would need to be detected and removed for good quality results.
• The void filled 3 arc seconds data from the USGS/NGA vary strongly in quality of the void fill, in Europe they mostly just interpolate (slightly better than your gdal_fillnodata attempt but essentially similar).

I agree with this; they’re quite evident when you see the hillshading layer.

You can see that for example in your final image where the valley at the bottom appears dammed near Mollières.

If by dammed you mean that smooth looking slope, yes, of course, I’m using less accurate data to fill that void. What I’m saying that this is the better I get from what I have.

Here for comparison a rendering of my current basic processing in that area

I would like to know which data are you using. I downloaded deFerrantis 1 arc for that region (http://www.viewfinderpanoramas.org/dem1/N44E007.zip) and indeed they look good in this region, but if you check the plains to the NE, you’ll see not nice terracing, like the one I showed in my post. There are also several vertical and horizontal ‘cuts’. Just run gdaldem hillshade on it to see what I mean.

I prefer to balance a bit of accuracy for time saved (again, I’m not a professional cartographer like you, this is mostly for having fun… and useful offline maps in my phone) and better looking plains.

with OSM lakes flattened.

Well I don’t need this, as I’m drawing the lakes on top of the terrain anyways. See:

http://grulicueva.homenet.org/~mdione/Elevation/#13/44.1810/7.1582

(This is not the definite map; in that one, slope shades are too dark and confusing).