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We purchased 10 acres of land at this location

OpenStreetMap is a map of the world, created by people like you and free to use under an open license.


I’ve been diligently putting some truly boring information about my local High Street. Removing shops that don’t exist, adding new ones and adjusting opening times. It’s a shame businesses do not feel the need to do it themselves on OSM. I was wondering why is this, but then I realised that none of the navigation application I am using displays this information. I can check it on the Every Door and that’s pretty much it. Google Maps, by comparison, makes it really easy to see it and at the same time warns you of closing times, which makes it really practical in urban setting.

Having made comparison to the Map-That-Cannot-Be-Named, I realised how inaccurate Her* data is for my immediate neighbourhood. I’ve looked up some other places and though it would always take me more or less to the right location, the exact positions or addresses were off by quite some margin. At the same time, kudos to the interpolation heuristics that can find approximate addresses even in the absence of good data.

Especially that I am now realising how difficult addressing is. In my naivety I always though of streets as linear objects, with Hausdorff dimension 1 and ordered house numbers perhaps with an odd/even partition. Couldn’t be more wrong. I need to file a request to change the name of Dale Lane to Fractal Lane or Hausdorff Street (strasse?) to celebrate its many dendritic offshoots and arbitrary switch from consecutive ordering to odd/even ordering.

*Maps are feminine, right? Just like ships or cars.


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OpenStreetMap is a map of the world, created by people like you and free to use under an open license.

















Direction-Tag subtiler Bedeutungsunterschied Geltungsrichtung vs. Blickrichtung, z.B. bei bei z.B. highway=give_way und highway=stop


Right! I finally started using OpenStreetMaps.

Thanks to a friend who pointed me to Magic Earth I now have a viable navigation system which uses OSM data and thanks to StreetComplete I am slowly learning about tagging. The multiplicity of apps is not ideal, but a staged approach to OSM concept is clearly necessary. My previous attempts to become an OSM users failed because I was overwhelmed by complexity or perhaps I should say expressiveness.

In the foreseeable future I will be just using StreetComplete to improve my local area, but I am already seeing some issues that require more in-depth changes. Also, there are some edits that I have already submitted, but after reading the wiki I do not believe them to be accurate any more.

Here are a few topics I need to chase:
  • terraced houses - the terraced houses in my area are all lumped together. They are not divided up, so assigning numbers requires usually a comma separated list. I would like to fix it and break the rows into single terraced houses with one number each.
  • I need to figure out how to mark multiple buildings belong to a school or a care home for elderly.
  • terraced bungalow houses - I am guessing they are terraced houses as bungalow definition clearly states detached. My area has many rows of single storey houses
  • I may have messed up some bollards by marking them as fixed, whereas in fact some are removable with key. Will need to keep an eye on this and maybe learn to use Vespuchio to fix those in the future.
  • Sometimes I am not entirely sure whether a road is asphalt or concrete with some coarse aggregates inside. I was assuming it’s asphalt as that’s what we typically put, but maybe I should take some photos and asked someone who knows better.



Once upon a time, I was asked why I had only marked the south end of a trail and not the north end.

Well, I said, I haven’t been there, so I don’t have a GPS track. All I have is that USGS line and the one thing I know about it is it’s wrong. As long as it isn’t mapped, someone will be more likely to put down the correct line when they do want to map it. They might not even notice it’s needed if a bad line is there.

Then I said I might come down on the side of mapping everything you can as best you can sometime later.

Well, it’s later. Now I say map it all! And put down the source as you do it. Not just in the changeset note, but actually on the segment. And it can be good to make a guess about trail_visibility. I have more tools now.

Strava heatmap is the best as an average of GPS signals, if you can get it. I have found what is probably the firefighter loop through nearby private lands and not actually available to the public as a hike on there. It looks like a nice loop out there in Kneeland where there’s no public hiking. Only the most popular trails have enough heat to be an average. A random spattering of others have some kind of clues.

I can download system trails from the Forest Service’s data clearinghouse. Most of these match the Forest Service Topo (another source), but some have updated. Some of them match the USGS lines. Okay, a lot. And apparently Six Rivers has no system trails at all. They are seriously slacking. (And now a section of their roads has vanished from the Interactive Visitor Map. What is wrong with you, Six Rivers?)

And there’s ever more imagery. Sometimes it’s just visible. All the other lines available helps to differentiate the actual bit of trail from random fallen trees that make a line on the ground. A ridge trail might have a fuel break competing with trail, so there are plenty of bad signals just looking at photos. Down the gully, that might be just water course. Or trail. Or both.

So I’ve been working my way through the roads around the Trinity Alps Wilderness and some areas around Marble Mountain Wilderness and now the trails are going in. (I think I’ve got all the roads on the north side, west besides the reservation, and southwest sorted through.) I’ve just about got all the system trails in. Got a few things from USGS. Will have to ask Chris about his Orleans District trail maps. Shasta-Trinity has decided to usurp the Salmon Summit name for a bit that isn’t Salmon Summit while Six Rivers, where the National Recreation Trail actually goes, sits there without trails. There’s some “footpath” marked stuff that needs adjusted. Footpaths are for more developed trails than generally found in a designated Wilderness. Still lots to do.

Oh, and those trailhead parkings 200 feet inside the designated Wilderness? Mapping that as is. Ground truth!




Not sure why someone would want a diary, but what the heck. Not adding anything today.

OpenStreetMap is a map of the world, created by people like you and free to use under an open license.







Today is Saturday

OpenStreetMap is a map of the world, created by people like you and free to use under an open license.



when placing these down; what is the universally accepted placement and direction of signal lights?

Is it the location of pole and direction of lights controlling traffic. Or is it attached to the Roadway and pointed in the direction of signaling? Any help would be appreciated…

The Wiki info on usage is very generic in wording..




Jumped in committed to contribute before ever downloading or selling the map and software I just knew I could help Now it’s September 22 2023 Let’s see how long it takes me to figure this out



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