OpenStreetMap

Latimer Road mapping party

Posted by Harry Wood on 7 May 2009 in English (English)

We finally had a Latimer Road mapping party last night. The patch of unnamed streets in this bit of West London had been bugging me for about a year now. Why had nobody ventured into the area in all that time? We thought the reason was that it's a horrible bunch of dodgy concrete jungle housing estates. As it turned out it was a combination of concrete estates and super-posh georgian terraced houses strangely existing side-by-side. Quite similar to slice 7 at last year's session near Elephant & Castle (woosh! the map's come on a long way since then!)

We converged on the pub, and discovered that "The Station" had a new name "Garden Bar & Grill". That kind of thing causes a problem for meet-up logistics, but look on the bright side node number 391843331 makes us more up-to-date than beerintheevening.com, fancyapint.com, google streetview ...well for that pub at least. And a very nice pub it was too, although at those prices it would be. I guess this pub caters to the inhabitants of the georgian terraced houses rather than the concrete estates.

Everyone found us in there eventually, although we did start to wonder about someone who had signed up on the wiki at the last minute by the name of 'Wynndale'. He'd volunteered to map the westerly cake slices 15 & 16 which were rumoured to be the skankiest of the concrete estates, deep within White City gang land. We started to fear some sort of mapping casualty before we'd even met the chap, but he turned up a bit later on.

Whilst enjoying expensive beers on plush sofas we chatted about various things: Our encounters with dubious bugs in JOSM, which (still in fact) don't make it clear when an upload has failed. JOSM should perhaps offer an old style uploading option, as a fall-back alternative to the new diff upload. The causes of 'precondition failed' error responses and how they are triggered in the API by relation editing.

latimer road 1 latimer road 2 latimer road 3 latimer road 4

latimer road 5 latimer road 6 latimer road 7 latimer road 8

...and the hardest problem of all: Where the hell are we going to go mapping next? Sadly we didn't really solve this conundrum. Looking at a printout of NoName London, we really need to get out to zone 4 and beyond, so one suggestion was to reduce the number of evening mapping parties, and slot in a few weekend ones where we journey out to somewhere. Give me some more feedback on this. Good idea or not?

I'll put details for the next one on the wiki page shortly (unless someone else wants to do it!) It looks like we'll have to bite the bullet and map Peckham. Dave helpfully reminded me of the alternative names for this part of London. "Camberwell" or "South Bermondsey" sound much nicer!

Location: Silchester Estate, North Kensington, Royal Borough of Kensington and Chelsea, London, Greater London, England, W10 6UB, United Kingdom

Comment from randomjunk on 7 May 2009 at 12:59

I don't know how you're /supposed/ to find these things... but http://josm.openstreetmap.de/ticket/2511 implies that "setting osm-server.atomic-upload=false" should make JOSM go back to old style uploads as of 1578.

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Comment from Tom Chance on 7 May 2009 at 13:23

Hey, Peckham is a perfectly nice place! :P Tch, we've come on a bit since the Desmonds, y'know!

What about a landuse party / drive to complement the POI mission? London looks really unattractively patchy with some largeish residential areas marked in but loads missing.

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Comment from Harry Wood on 7 May 2009 at 14:24

randomjunk: yeah where is that documented? I vaguely remember a mention of it somewhere.

Tom Chance: You live there? got a pub recommendation? Yeah Landuse is a bit of a funny problem. We need a coherent strategy for drawing landuse in somewhere like London, plus deciding how this fits with building outlines. I guess a lot of it can be done quite quickly from Yahoo and vague local knowledge if we only decide what the plan is. I listed these issues on the Central London wiki page

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Comment from Tom Chance on 7 May 2009 at 14:36

I popped a pub recommendation onto the wiki when I added Peckham, it's a 5 min walk from the south edge of the area to be mapped. I have to admit I don't go to pubs in the centre of that area much!

In the south part of Peckham and in East Dulwich I've done quite fiddly landuse areas making sure that open space / railways etc. are outside of any landuse, and retail/industrial is all marked in. They're quite a useful navigation aid when walking around, help people quickly understand where shopping etc. areas are, a useful way to say "this area is pretty well mapped" and IMO they look nice. I reckon we just need to bite the bullet and do this everywhere, and treat landuse as another part of the map furniture along with POIs and other things Google doesn't bother with :)

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Comment from Tom Chance on 7 May 2009 at 14:38

Oh, and we really need to distinguish between homes & other random buildings (which should be a paler fill and only at the highest zoom level), and important buildings (which should show up as all buildings currently do). It's a right mess at the moment!

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Comment from Harry Wood on 7 May 2009 at 15:14

Ah yes. Bar Story. So are you free for a mapping party on Tuesday 19th if I arrange it there?

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Comment from Tom Chance on 7 May 2009 at 15:33

Not the 19th, but I'm free on the next two Weds dates on the wiki.

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