Re: [talk-au] Where to use sat image rather than GPS input?

2014-04-04 Thread Mark Pulley
On 4 Apr 2014, at 11:22 am, Frank wrote: > Context: Jenolan Caves, there is a tunnel that connects two valleys. The GPS > information contains errors that is enlarged by the reduced view of GPS > satellites and by multipath reflections caused by the valley and the steep > hillside that the tunn

[talk-au] Where to use sat image rather than GPS input?

2014-04-03 Thread Frank
Context: Jenolan Caves, there is a tunnel that connects two valleys. The GPS information contains errors that is enlarged by the reduced view of GPS satellites and by multipath reflections caused by the valley and the steep hillside that the tunnel passes through. In some places I contend that