>> For a few thousand  the surveyors here in the states are
>> supposed to get accuracy down to inches.
>>
>
>Yes, but to get that kind of accuracy they leave their GPS
>receivers listening for hours averaging out the errors over
>time. Not the case here.

I always understood they were licensed to use the high accuracy data stream, 
not the normal one used for consumer GPS. They certainly cannot wait around 
for ages to get an average done.

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