MariaMar 3
There's a London* Missing Maps mapathon tonight if you fancy joining in and doing some #humanitarian #mapping with a bunch of nice people. Free tickets from the link. *It's online so London in name only, these days people join from all over the world. (This also happens monthly in case tonight's too short notice.) We start 7pm UTC https://www.tickettailor.com/events/missingmapslondon/1040085
Get Tickets – Missing Maps London Mapathon – Zoom

Missing Maps London Mapathon – Zoom, Multiple dates and times - This Mapathon will take place online! If you wish to attend please register and details for joining the event will be found in the online event page. This event is London based in name only! Since we have moved to virtual events we have been getting attendees from all over the world - w...

Show threadGina Peter BanyardMar 3

@bluestarfish I'll see if I can join, and maybe get help to map buildings in Chiswick as my whole neighbourhood is just *empty*.

And I'm not super comfortable with the satellite imagery as Bing's seems to be quite outdated :-/

Show threadDerick RethansMar 3

@Girgias I would suggest not to use Bing for adding buildings.

Instead, I use the "NLS - OS 1:1,250/1:2,500 National Grid Maps, 1947-63 - TQ" layer as reference.

I draw from that, and then verify it's still up-to-date by walking around and looking what changed. Having an existing reference makes it a lot easier, and on top of that you get (some) address information too.

To do terraced buildings (like south of Chiswick High Street), I created the Uberterracer plugin: https://josm.openstreetmap.de/wiki/Plugins

Show threadGina Peter Banyard
@derickr Do you need to line up the layer? Or is Bing just very misaligned?
Mar 3 at 11:59pmWeb
Show threadDerick RethansMar 4
@Girgias Probably both! You might need to get a proper GPS (not a phone, which does AGPS) to establish ground truth.
Show threadAlerta! Alerta!Mar 4

@derickr How much difference does AGPS vs GPS actually make? In terms of accuracy?

/cc @Girgias

Show threadGina Peter BanyardMar 4
@derickr yeah thinking of doing that, any recommendations?
Show threadDerick RethansMar 4
@Girgias I use my sports watch for these things. On multiple days for an average.