SK53's Diary Comments

Diary Comments added by SK53

Post When Comment - how's it going? about 14 hours ago

I think the big advantage of the Community site is that there is more awareness of things happening in other communities and consequently better knowledge that many mapping issues are more general. Some of this is purely down to some of the poor UI/UX aspects you describe!

Mapping and learning about milk churn stands 3 days ago

Will do, there are only two. Took far longer to find them than to map ‘em. I’m sure if you do a trip to Wales there are lots more around Carmarthen.

Mapping and learning about milk churn stands 4 days ago

The Welsh example of a lorry collecting churns probably comes from this site, and belongs to the RCAHMW under a NC licence.

Mapping and learning about milk churn stands 4 days ago

and another

Mapping and learning about milk churn stands 4 days ago


Syntactic conventions for new tags

“The strings chosen for the key part have some conventional forms:

Ideally, a key is one word, in lowercase, using British English if possible. When that can’t be the case, a key should be one concept, whose words are underscore_separated. This avoids some whitespace issues, and has generally come about because OSM people also tend to be programmers and like the syntax.”

from the wiki, my emphasis ;-)

Mapping and learning about milk churn stands 5 days ago

A bit frustrated that I couldn’t find one, but have eventually located one:


A couple of comments:

  • Shouldn’t the tag be milk_churn_stand. In general hyphens are not favoured.
  • You should probably provide attribution for the image from the National Collection, and the Geograph ones. See how I’ve done it here.
How to tag a corral? 12 days ago

Not horses, but similar queries were raised about sheepfolds (with contributions from Greece, Iran and UK). I’ve also noted stone (?) enclosures for cattle in high-altitude areas of Lesotho. There’s a nice article here on the various uses of sheepfolds.

Wikipedia mungs together a whole range of different things under Pen (enclosure) which is not particularly helpful. I therefore agree that “pen” is probably too wide-ranging, and I think the other key thing is that we are looking to tag structures well away from farmyards. I don’t think corral as a tag would be too bad.

It’s a shame that old USGS maps really capture little other than the homestead of old ranches. There must have been more obvious infrastructure.

Seen on my (virtual) travels 2. Modern Stone Circles 16 days ago

It might be a UK thing. Most regular estate agents are in shops on high streets, with some kind of customer service agent. You can just wander in and have a chat. Years ago there was one which sold houses and war gaming miniatures! But historically they’ve often offered other retail services, such as minor banking.

There are also high-end residential and commercial estate agents in non-retail areas with office premises where you usually need an appointment.

Mapping nature reserve, along rivers but not only about 1 month ago

Seems to be protect_class=14 (there’s a fishing prohibited one for Germany)

About about 1 month ago

Field names are actually an invaluable resource for linguistic scholars of language. Because of their very nature of being passed down the generations they often preserve older pronunciations and dialect words.

My cousin, formerly a lecturer in Irish at the University of Ulster, is an expert in this area, and is currently working on a linguistic atlas of Brittany. He always places great value on the actual pronunciation, so it is worth making audio recordings relating to this data as well.

I think another germanophone, b-unicycling, has also mapped field names around Killarney.

National Heritage List for England open data downloads for Vespucci and Orux Maps 2 months ago

I’m not sure that the Heritage England licence terms are actually OGL, specifically clauses 2 & 3 appear to remove rights standardly granted under OGL:

You must always use the following attribution statements to acknowledge the >source of the information:

© Historic England [year]. Contains Ordnance Survey data © Crown copyright and database right [year].

The Historic England GIS Data contained in this material was obtained on [date]. The most publicly available up to date Historic England GIS Data can be obtained from The same requirement for an attribution statement must be contained in any sub-licences of the Historic England GIS Data that you grant, together with a requirement that any further sub-licences do the same.

I asked Owen Boswarva about this privately a month ago and he pointed me to a tweet of his from October, also raising doubts about whether the licence is truly open.

Steep paths : refinement of approach 3 months ago

I’m actually looking at a ski area which has freeride runs which climb above a lift station in order to gain access to the next valley, for instance this one. In some of these cases the tagging is a bit deficient in not splitting the uphill & downhill parts of the route, but they do neatly exemplify the issue.

Steep paths : refinement of approach 3 months ago

@InsertUser: Not at the moment, but once I have everything in PostGIS I would use st_segment to add vertices to paths at a given interval (10-20 m perhaps), one could also use contours to add points where a path intersects the contours. In principle one could do this with vectorised versions of the slope & aspect, but I think that is both overkill & prone to polygon assembly artefacts.

fieldpapers non-functional 3 months ago

I suspect this is part and parcel of Stamen withdrawing support for various tile layers. It was rather hidden away in a post by Alan McConchie on the #30daymapchallenge, but I think we reported it on weeklyOSM, but didn’t spot that it might affect Field Papers.

Finding steep paths which may need review 3 months ago

@Kai Johnson: really nice to hear that this has resonance elsewhere. Looks like California has reasonable Lidar coverage, but not sure about other DEM resources in the US.

I’ve now done the more detailed analysis, but I need to do some work on the visualisation and rebuild the DEM (not all areas had 1 m Lidar, so I need to add in some 2 m Lidar to fill the gaps). Once I’ve done that I’ll write up the work-flow.

At present no real surprises in the immediate area I’m looking at (NY20), other than a path which certainly didn’t exist 20-odd years ago, but can be followed on imagery.

Finding steep paths which may need review 3 months ago

@InsertUser: completely in agreement, scramble might not have been perfect but it would have avoided this type of incident.

How to show paths on a map? 4 months ago

I was a bit puzzled why Scafell Pikes had disappeared entirely and Sca Fell had popped up in its place, but it turns out that the trig pillar has been added with an erroneous name. Not sure why you are picking it up though.

The actual sac_scale grading of paths in the area is somewhat overwrought (e.g. from Mickledore to Scafell Pike is not hard).

Incidentally, Scafell Pikes is the only British peak where a companion has said “Bergheil!” at the top. It was a particularly fine day with good quality snow down to 2000 ft which emphasised its character.

Resolved a note without a comment or fixing a problem 4 months ago

Yes, anonymous notes are often seriously misplaced, and people use them for all sorts of things.

The kind of issue I see is like with this note. It was closed a few days ago by someone with no edits, but the actual walking trail still has a gap in the village, as can be seen here. In the ideal world the note remaining open would encourage someone to look for signs to resolve it. However, it’s not that important as : 1) the route relation has a gap; and 2) the likely correct route is fairly obvious and does go past the church.

Some communities try and close notes fairly quickly, others are quite happy to let them be used to track developments over several years, or to draw other mappers attention to things missing or needing to be checked. There is something to be said for closing anonymous notes if they cannot be resolved fairly easily.

Resolved a note without a comment or fixing a problem 4 months ago

This is surprisingly common: a new user with no edits closes notes. I’ve never really worked out why. Your suggestion that this is because the feature is present on other maps is an intriguing one.

Who is the first OSM editor around my city? 4 months ago

There are some quirks in the earliest OSM history, some, perhaps, as a result of changes in the data model.