Hi Adrian,

Given that both ends of Shillingford Lane join public highways, then unclassified is the better tag.

Mike

Hi Messpert, you did make a valid point though. The northernmost 20 metres is two-way as it precedes the blue and white one-way signs.

Hi Messpert, there used to be a pair of blue and white oneway arrow signs either side of way/38033541 about 20 metres from the junction with the A390. At the southern end of way/38033541 there used to be a pair of round red and white no entry signs plus white paint on the road saying the same. See images on Google Earth, although these may be outdated. The oneway signs might now be obscured by hedgerow growth. Or possibly the whole way is now two-way, even though it is extremely narrow, hemmed-in by close hedges and has no passing-places.

Topic raised in talk-GB as similar motorway junctions will crop up elsewhere.

Your statement that "I'm arguing that in OpenStreetMap we don't normally split roads unless they're physically separated" is too grand a claim.

Your statement that "We should split the road at the point it actually becomes two - I'd say where the solid white line starts just before the physical split (i.e. where it was)" is contradictory, because the solid white line starts about 150-200 metres before the physical split.

No, it isn't a mis-mapping. It is reflecting how things really are on the ground. Check the gps traces. What I have done is to reflect actual usage and road markings. I will revert my changes if you can show me the section in the Road Traffic Act which says something equivalent to "when an exit taper is provided (a widening lane seperated from the ongoing carriageway by a dashed white line) drivers must not use this lane until the dashed white line is replaced by a solid white line"

By marking the boundary between the motorway and the off-lane the Highways Agency is encouraging drivers to think ahead and get themselves positioned. Many take this hint, moving outwards as soon as the dashes start. Some don't and put themselves and others at risk by swooping from the overtaking lane into an off-lane at the last possible minute. By matching the OSM ways to the road markings, navigators and satnavs can provide better positioning advice to drivers.

Reinstated the 3 valid tags on node/309474.

Please give an example node where the gps tracks are inconsistent with my positioning and I will investigate further.

Which node held the motorway junction tag ? I'm happy to fix that.

Too far away to return just to read the sign, so changed access:private to vehicle:private in case these ways are still open access for hikers.

Typo in comment. Should say Cutcombe Hill instead of Coombe Hill

I only started with the intention of putting in the name of the statue, then noticed the angular nature of the adjacent roundabout ..... I gave up when my fingertips started to go numb - all my updates are done via a tablet. I don't want to deprive your fellow mappers in the Maidenhead area of the opportunity for more practise :-)

Maidenhead is a good example of mapping discrepancies caused by contributors who prefer particular background images. Marlow Road has relatively few GPS traces, so using just those gives a similar illusion of accuracy. I have done a best-guess re-alignment using the smeared-out GPS traces around the roundabout and moved parts of Marlow Road.

I have noted the same clouds in satellite images from different providers and had to use Digitalglobe set to map a Tesco that the others didn't show. The realignment of the Hazeldon junction was prompted when my satnav didn't correctly show the lane seperation on the exit/entry slips, then I noticed that some of the midline nodes for the lanes on the main carriageway were not a smooth progression.

Hi Chris, there is about a 10 foot difference between the Bing and Mapbox images in the areas around the "Hazelden" junction and the bridge across Earn water below it. Are you referring to something more extreme than this ? If so, where ? I have looked at the GPS traces, which show even greater positional variability. I have various cropped bitmaps, but this discussion tool has no mechanism for including them (AFAIK)

Hi Ginaro,

On a much earlier edit where I moved multipolygonGB points off the clifftop grass and onto the beach I got feedback to the effect that I should have moved them into the water, as legal jurisdictions went out to the mean LOW water (spring) - and frequently further in the case of estuaries, marinas, piers etc. I have found the WIKI page that confirms what you say about the OSM convention.

I only have a tablet, so all my edits are done via the Vespucci app. On that, there is no blue line on any of the OpenStreetMap backgrounds which use colours. This is also true in my browser when using the ID editor display, although it is impractical to actually use this for editing OSM on my tablet.

In both cases, there is a blue area whose boundary lies (mostly) offshore, but sometimes incorrectly comes inland when compared to the satellite images.

Q1 If the boundary of the blue area is what you meant by blue line, then who should be informed of the errors where it is inland ?

Q2 Why don't more of the multipolygonGB coastline nodes coincide with the boundary of the blue area ?

Given the amount of post-processing applied to satellite imagery, it is probably more accurate to say that every one of them is wrong, just by different amounts in every place :-) if you look carefully as you zoom in and out of the tiles from a single provider, you can sometimes see the backgrounds move around slightly compared to the foreground ways and nodes !

However, by all means move the Main Street nodes south if there are consistent GPS traces demonstrating that the Bing etc. backgrounds are currently more accurate than Mapbox in this area.

Thanks for the heads-up about the bollards, the barrier tag is now on a node, it was incorrectly set on one of the Shore Road way segments.

Regards.

Typo : changed way to private based on road signs

Given that the nodes of the way defining Passage Road were shared with those of the South West Coast Path, I had assumed that it would have been a duplication to also mark Passage Road for foot access, but I have just done so.

Perhaps its a usage thing. My concept of a service road is the sort of roads that go down the back of shops for delivery lorries, or those leading into/outof car parks and inbetween their lines of painted bays. This was a narrow single-track road with passing places going through open country, farm and campsite areas.