[Geysers] Mapping Help

TSBryan at aol.com TSBryan at aol.com
Mon Nov 11 12:17:34 PST 2013

I seem to recall that Mike Keller accompanied the SCA people during some of 
 the mapping program. If so, maybe he can elucidate us as to just how and 
why  certain survey positions were chosen. (Example 1: Were the coordinates 
always  taken at [say] the southernmost extreme of a feature? Example 2: Were 
the  coordinates always determined at some specified distance away from the 
edge of a  feature? etc.]
All this kind of stuff in mind, where is the justification for coordinates  
cited to 7 (seven ! ) decimal points? Strikes me as vast overkill. At  
Yellowstone's latitude (and with this, I'll stick to latitude because it's a  
bit easier), one degree of latitude is equivalent to just about 69.055  miles. 
That is 364,610 feet. Multiply that by 0.0000001 gives 0.0364 feet, and  
that means these coordinates are supposedly accurate to within a touch more 
than  0.43 inch. Really?
Scott Bryan
In a message dated 11/11/2013 10:30:07 A.M. US Mountain Standard Tim,  
david.schwarz at alumni.duke.edu writes:

As a  result, many of the coordinates that year were only taken within 
roughly the  same long-distance dialing area as the feature being mapped.  
Obviously,  it doesn't matter how accurately the equipment pinpoints your 
location if  you're not particularly close to what you're trying to  map.
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