[OSM-talk] fwd: Two thirds of mobile users want driving ANDwalking navigation

[Dave F.]

John Smith wrote:
> On 17 February 2010 01:40, John F. Eldredge <john at jfeldredge.com> wrote:
>   
>> Frequently you can't get a position fix at all, if the building has much metal in its structure.  I can't get a position fix from inside my house unless I am near a south-facing window, probably due to a metallic-foil vapor barrier in the attic.
>>     
>
> It has little to do with the material it's made of, it's all about how
> much mass an object has, the more mass the more it will absorb RF.
Is this correct?

I assumed the reason I had trouble getting reception on board trains 
because of what their roofs were screened with. 
I can't believe they'd put much mass up there.

Cheers
Dave F.