[OSM-talk] fwd: Two thirds of mobile users want driving ANDwalking navigation
davefox at madasafish.com
Tue Feb 16 17:46:21 GMT 2010
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.
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