[OSM-talk] Error in Google-Maps

Gert Gremmen g.gremmen at cetest.nl
Thu Jan 29 08:03:24 GMT 2009

Could it be irrigation canals ?


Gert Gremmen



Openstreetmap.nl  (alias: cetest)

P Before printing, think about the environment. 



Van: talk-bounces at openstreetmap.org [mailto:talk-bounces at openstreetmap.org] Namens D Tucny
Verzonden: Thursday, January 29, 2009 2:29 AM
Aan: Adam Schreiber
CC: Jürgen Reimann; talk at openstreetmap.org
Onderwerp: Re: [OSM-talk] Error in Google-Maps


2009/1/29 Adam Schreiber <sadam at clemson.edu>

On Wed, Jan 28, 2009 at 7:27 PM, D Tucny <d at tucny.com> wrote:
> Of course, OSM isn't perfect...
> http://sautter.com/map/?zoom=11&lat=29.60689&lon=112.12921&layers=B000FTFF
> I'm pretty sure there's no grid of motorways there... :/
> There might be a grid of roads though, so seems like a new mapper
> potentially needs some prodding towards the documentation... I'll go do
> that...

If you switch to the Google sattelite imagery, they are still pretty
big roads at zoom 14 which is the lowest google has imagery for.  They
may not be motorways as we think of them, but they're something big.

They probably are reasonably big access roads for a future development... a 3 lane each direction dual carriageway with nice wide garden filled central reservation with trees and/or other plants to each side seperating the wider than a normal lane cycle ways on each side from the main carriageway wouldn't be unusual for a slightly out of the way development (e.g. http://maps.google.com/?ie=UTF8&ll=30.183743,120.206845&spn=0.003269,0.006866&t=h&z=18)... And they aren't much smaller in city centers when new roads are built, or in some cases, where existing roads are upgraded, which, with all the demolishing of buildings that accompanies it, probably makes it a lot more expensive than just making massive roads in the first place when they can, leading us back to the probable logic behind building roads wider than two motorways for access to and within a small development... 


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