Re: basic topology and the Data Model with geo-locations

  • To: Steve Emmerson <steve@xxxxxxxxxxxxxxxx>
  • Subject: Re: basic topology and the Data Model with geo-locations
  • From: Doug Lindholm <lind@xxxxxxxx>
  • Date: Thu, 06 Apr 2000 14:42:11 -0600
Steve Emmerson wrote:
> 
> Bill,
> 
> >Date: Thu, 06 Apr 2000 12:45:03 -0500
> >From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>
> >To: Stuart Wier <wier@xxxxxxxxxxxxxxxx>
> >Subject: Re: basic topology and the Data Model with geo-locations
> 
> In the above message, you wrote:
> 
> > 3. ((lat, lon, alt) -> (time, obs))
> > In this case, the domain Set would be a Gridded3DSet with
> > manifold dimension = 1.  This is probably the preferable
> > way, since it preserves the notion that the spatial points
> > are along a path rather than just a random scatter.
> 
> How would one programatically know that "time" is the manifold variable
> and not "obs"?
> 

I'm partial to (time) -> ((lon, lat, alt) -> (obs)). This makes
resampling by time or space rather convenient. VMET assumes such an
arrangement.

I don't want to start a religious war but I also prefer (lon,lat,alt)
over (lat,lon,alt) because it relates directly to (x,y,z).

Doug

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