Re: [HOT] Question about background image alignment

2014-08-13 Thread Andrew Buck
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Yes looking at the GPX traces in the area the current Bing looks very well aligned (by the way that imagery layer is awesome, thanks for the url on that; been looking for something like that for a while). Regarding the things which are offset and show

Re: [HOT] Question about background image alignment

2014-08-13 Thread Erik Walthinsen
On 08/13/2014 08:44 AM, Dan S wrote: The answer is no, when you first load an imagery layer into JOSM it does not offset it, and there may be a systematic misalignment relative to GPS coordinates. OK, I guess I wasn't quite precise enough in my query: What I'm seeing is that much of the data i

Re: [HOT] Question about background image alignment

2014-08-13 Thread Dan S
2014-08-13 17:20 GMT+01:00 Erik Walthinsen : > On 08/13/2014 08:44 AM, Dan S wrote: >> >> The answer is no, when you first load an imagery layer into JOSM it >> does not offset it, and there may be a systematic misalignment >> relative to GPS coordinates. > > > OK, I guess I wasn't quite precise en

Re: [HOT] Question about background image alignment

2014-08-13 Thread Dan S
Hi - The answer is no, when you first load an imagery layer into JOSM it does not offset it, and there may be a systematic misalignment relative to GPS coordinates. If you are in an area where enough GPS traces are available, you can move the imagery to match those before you trace. GPS traces ar

[HOT] Question about background image alignment

2014-08-13 Thread Erik Walthinsen
[Not on the the list, just trying to get an idea of what is 'correct'] > JOSM is better to do such a Job. I'm also looking at a ~7.5m misalignment in parts of Monrovia, when viewed on Bing imagery in JOSM. Should I assume then that JOSM alignment is "always correct" or at least always *canon

Re: [HOT] Question about background image alignment

2014-08-10 Thread Blake Girardot
ardot *De :* Blake Girardot *À :* *Cc :* "hot@openstreetmap.org" *Envoyé le :* Dimanche 10 août 2014 7h24 *Objet :* Re: [HOT] Question about background image alignment Hi, Thank you both very much for replying. I am new

Re: [HOT] Question about background image alignment

2014-08-10 Thread Pierre Béland
ierre De : Blake Girardot À : Cc : "hot@openstreetmap.org" Envoyé le : Dimanche 10 août 2014 7h24 Objet : Re: [HOT] Question about background image alignment Hi, Thank you both very much for replying. I am new to OSM and HOT so please forgive my ignorance. It

Re: [HOT] Question about background image alignment

2014-08-10 Thread Blake Girardot
On Sun, Aug 10, 2014 at 1:24 PM, Blake Girardot mailto:bgirar...@gmail.com>> wrote: If I understand your advice correctly, I would correct the background image alignment to match the roads and some of the buildings and then fix the rest of the buildings in the village. ​Yes the buil

Re: [HOT] Question about background image alignment

2014-08-10 Thread Ralf Stephan
On Sun, Aug 10, 2014 at 1:24 PM, Blake Girardot wrote: > > If I understand your advice correctly, I would correct the background > image alignment to match the roads and some of the buildings and then fix > the rest of the buildings in the village. > ​Yes the buildings are pretty much nonsense, a

Re: [HOT] Question about background image alignment

2014-08-10 Thread Blake Girardot
erre *De :* Ralf Stephan *À :* Blake Girardot *Cc :* "hot@openstreetmap.org" *Envoyé le :* Dimanche 10 août 2014 2h11 *Objet :* Re: [HOT] Question about background image alignment I can only tell from my perspective, I would look what's the offset

Re: [HOT] Question about background image alignment

2014-08-10 Thread Pierre Béland
rest of the world, this is less a problem then 30 meters between two buildings.   Pierre De : Ralf Stephan À : Blake Girardot Cc : "hot@openstreetmap.org" Envoyé le : Dimanche 10 août 2014 2h11 Objet : Re: [HOT] Question about background image

Re: [HOT] Question about background image alignment

2014-08-09 Thread Ralf Stephan
I can only tell from my perspective, I would look what's the offset of the majority of objects in the tile and the surrounding tiles, and use that as your offset. This presupposes that you use JOSM. With the browser it would be difficult. A question would be then if you should correct the minorit

[HOT] Question about background image alignment

2014-08-09 Thread Blake Girardot
Hi, I apologize in advance if this is answered somewhere but I did not find the answer. Working on the #586 - Ebola Outbreak, Panguma (Sierra Leone) -- Updated Imagery, 2014-07-15 task I have seen a few places where it looks like the background image is misaligned with some of the mapped objec