On 6/14/07, Mike Liebhold <[EMAIL PROTECTED]> wrote:
FWIW: there are two other groups working with related codes: pyxis in australia has a scheme for spatial codes: see: http://www.pyxisinnovation.com/pyxwiki/index.php?title=How_PYXIS_Works
I was going to chime in and mention Pyxis, you beat me to it. I will point out that Pyxis is in Canada (Ottawa) but hey, who can keep all of those Commonwealth countries straight anyway. The debate over lat/long vs. global discrete grids has been raging for a while; I don't think that much will change unless a killer software app comes along that makes life easier for global analysis. I can work around the problems with area calculations and the poles. I guess that advocates would point out that I have to work around these problems as the problem.
On 6/14/07, brian grant <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> wrote:
I want to capture everything as well but store data such that sensor location is defined by its area not an orthogonal point on a sphere - and that is the problem looking for a solution - for sensors, photos and lots of other attributes.
One thing I don't get--why is an orthogonal area (I assume that you mean a polygon around a point, not a point with no extent) on a sphere a problem? For the small areas of influence that a sensor measures isn't the local topography and/or built environment much more important than any curvature in the earth's surface? Greg
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