[Proj] Projection advice

Roger Oberholtzer roger at opq.se
Thu Dec 8 15:33:50 EST 2011

On Thu, 2011-12-08 at 12:28 -0600, Noel Zinn (cc) wrote:
> GPS, too?  Anyway, I take your response as an affirmative (i.e. scale 
> accounted for).  Nevertheless, I'd advise sticking with local (and 
> disposable) projections, e.g. an oblique stereographic centered in your 
> (small) work area with (probably) a scale of unity at the center.  The 
> "best" wide-area projection may not be good enough for some (or many) work 
> areas.  -Noel

GPS is always the tricky part. When is it really good? A Kahlman filter
is the best practical solution. For that we use systems like those from
Oxford Technical Solutions. In the case I am discussing here, we are
messing around a bit. 

But how to make this projection choice automatic? That is what I am
trying to accomplish.


Yours sincerely,

Roger Oberholtzer

OPQ Systems / Ramböll RST

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696
roger.oberholtzer at ramboll.se

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

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