OpenStreetMap

mvexel has commented on the following diary entries

Post When Comment
Trunk in a funk 6 days ago

Hi all, Thanks a lot for your thoughtful responses. Here's a followup I just posted to talk-us:

Hi all,

I haven't abandoned this thread or thinking about it. It has just taken me a while to read through all the diary comments + what is being said in this thread. I intend to follow up with another diary post where I try to collect this smart crowd's thoughts and suggestions, but it will probably not until after State of the Map US that I get to this.

In the mean time, I decided to test some of the ideas posted here on a real case: The part of Michigan SR 10 northwest of the I-696 interchange: https://www.openstreetmap.org/relation/252973#map=13/42.5132/-83.3168

Since 1) this road does not seem to serve an important connecting role in the long distance road network 2) the density of abutters and related driveway / parking exits I judged a downgrade warranted. Please discuss here or on https://www.openstreetmap.org/changeset/52903464 .

On the topic of tagging for the renderer, two things: 1) A US-specific rendering would be really neat 2) Trunk 'appendices' like the one I just downgraded do make rendering at low zooms tricky -- you end up with short segments that seem to end in nothing.

Trunk in a funk 13 days ago

Yea, the OSM wiki actually has 40 MPH which perhaps makes more sense. Living in a rural state where speed limits are up to 80 MPH colors my thinking I guess.

Mapping turn lanes in OpensStreetMap 16 days ago

Another new diary entry that is related to this topic: Mapping Center Turn Lanes in the United States

OpenStreetMap US Mappy Hours Reboot 29 days ago

Yes, thanks, corrected.

How would you map this? 5 months ago

escada: I've seen transit -- it looks more complex to me than turnlanes:turns for mapping lane connectivity. Can you help me out mapping this intersection using the transit schema? I think relations would be needed, but not sure how to map the transition for example from 1-2-3:

123

It looks like 1-2 can be done with ways, as indicated below, but I am not sure how to identify that the left turn lanes from 2 to 3 lead to the left two lanes of segment 3.

seg1

seg2

Mapping turn lanes in OpensStreetMap 5 months ago

My recent diary entry with a 'mapping challenge' for a complicated intersection is relevant to this topic. I'd appreciate your feedback!

How would you map this? 5 months ago

Wow, thanks for all the feedback.

I am happy to see people seem to prefer the turn:lanes approach so far, which is simpler than the relation based schema I have also seen. Mapbox had a blog post that highlighted both.

One thing that would still lead me to want to use relations in some places is my second 'requirement' to correctly identify lane connectivity -- exactly which (turn) lanes connect to which. So how to map that making a left turn here (1->2->3)

left1

means that you have to go from lane to lane on the consecutive ways like this:

left2

For that you would still need a relation, or is there a simpler / other / better way?

How would you map this? 5 months ago

My question is not specifically aimed at CFI mapping. I just chose this intersection because it's reasonably complex.

Just Joined open street map. 6 months ago

Hi,

A lot of US based OSM mappers are on the Slack channel which you can join here: https://osmus-slack.herokuapp.com/

There is also a US specific mailing list you can subscribe to: https://lists.openstreetmap.org/listinfo/talk-us

Maproulette Newsletter - March 2017 7 months ago

I removed the Island challenge from this post since it was not made visible in MapRoulette yet. See this blog post for some context.

Are maproulette challenges undiscussed mechanical edits? 7 months ago

To clarify how to find the challenge creator for a visible challenge: use the search box (or the map) to identify the challenge you are looking for:

search

Then click on the marker, which will have a link to the OSM user who created it:

info

You will see 'SuperUser' for older challenges because we did not store creator information in earlier versions.

Are maproulette challenges undiscussed mechanical edits? 7 months ago

The challenge creator should be visible when you click the challenge's marker on the map on the main page. You can use the search box in the top left.

However if you try to apply that to this challenge you will come up blank. The reason why is that the user's project is not set to 'visible' which makes all the challenges that belong to their project also won't show up. The creator apparently did not intend to make this challenge public yet, and as such I made a mistake to highlight it.

The 'visibility' of a challenge only applies to whether it is visible on the map on the main page, and whether it shows up in the search results. It will still show up in the API. The reason why users can't make challenges completely 'private' is exactly what we are talking about here. I don't want there to be some 'shadow' activity that nobody can inspect.

As you can see from the API output the user who created this challenge has OSM ID 5441336.

I realize that it's not so easy right now to get a complete overview of the Challenges available in MapRoulette. It is one of the priorities to fix this. One thing someone could do in the mean time is to use the MapRoulette API to create an external list of Challenges.

Are maproulette challenges undiscussed mechanical edits? 7 months ago

I don't think this is necessarily a MapRoulette problem, but I do agree that it would be beneficial to have challenges checked for some basic quality standards, so that people who fix things through MapRoulette are properly prepared. That is part of the reason why I asked for someone or a few people to step up and become Challenge admins in my latest MapRoulette newsletter. I don't yet know precisely how that would work, but I envisage for now that I would provide a weekly list of new public challenges and the users who created them for the admins to review.

In this particular case, I would get in touch with the Challenge creator (there is a link in MapRoulette to their user profile) and ask them to comment here. Any problems with individual mappers making bad edits should be addressed with them. Again, I don't think that users making questionable edits is specifically a MapRoulette problem. If I were to shut down this Challenge, What is to stop them from just scrolling along the coastline looking for islands to fix in the same way they are doing it now?

MapRoulette newsletter 7 months ago

MikeN I can't keep up with these railway mappers!

MapRoulette newsletter 7 months ago

Correct, thanks you you I believe :) I'll edit the post.

Adding unknown roads using ImproveOSM 8 months ago

That's a good idea. Unfortunately we don't have access to that information in most cases. The GPS locations have been anonymized to exclude things like the timestamp, so they can't be used to determine the speed driven.

Passion for maps, graphs, and data 9 months ago

Welcome to OSM!

Attn: Mappers in SE Michigan, US 10 months ago

Very cool, good luck!

Finding the local experts 11 months ago

Richard, I still feel bad about never coming through with completing that effort...Who can I muster to revive it?

Cemeteries in Texas MapRoulette Challenge now powered by Texas Imagery Service 12 months ago

BladeTC I agree! Perhaps this challenge should be marked as 'hard'.