[postgis-users] Old question resurfacing

Gerry Creager - NOAA Affiliate gerry.creager at noaa.gov
Tue Dec 10 12:13:52 PST 2013


Bob, all:

I agree. I'll have to spend some time with pointcloud but it DOES look very
promising.

Another application? Lidar. Pointed at the sky, not at the ground (we use
'em to determine cloud layers [ceiling] and sky cover at airports for
aviation data...).

Thanks, all!
gerry


On Tue, Dec 10, 2013 at 1:49 PM, Basques, Bob (CI-StPaul) <
bob.basques at ci.stpaul.mn.us> wrote:

>  Gerry,
>
>
>
> Remi’s idea about using a point cloud may be spot on for your use.  It
> allows you to set a point cloud down to a revolution if need be, which
> seems like what you are looking for..  If the data becomes too massive for
> insertion into DB at real-time speeds, then you could also separate this
> revolution into separate DB’s as well, you could separate a whole number of
> ways, by elevation, or quadrant, or . . .
>
>
>
> I’m very interested in visualization possibilities with something like
> this being available in a database.  We’re doing some similar db 3d
> visualization stuff on some rather dense point clouds.  Your data once
> available could use the same visualizer.
>
>
>
> Bobb
>
>
>
>
>
>
>
> *From:* postgis-users-bounces at lists.osgeo.org [mailto:
> postgis-users-bounces at lists.osgeo.org] *On Behalf Of *Gerry Creager -
> NOAA Affiliate
> *Sent:* Tuesday, December 10, 2013 1:41 PM
> *To:* PostGIS Users Discussion
> *Subject:* Re: [postgis-users] Old question resurfacing
>
>
>
> Bob
>
>
>
> At least preliminarily, I can post-process, so speed of db adds isn't too
> troubling. Maintaining accurate representation of the bin-volume data is,
> however, important.
>
>
>
> Typical rotation is 1-3 RPM, and a complete volume scan takes ~11 min in
> clear air (where you best see biologicals if so inclined) or ~5 min in one
> of the storm data collection modes. These are for common WSR88D, stationary
> radars. SMARTR's and others we have here that are mobile present a whole
> host of other options/data eval and speed problems.
>
>
>
> Current radar data are nominally considered to have a horizontal
> resolution of ~250 m, ignoring distortion or keyholing due to
> range.Typically 16 elevations are scanned, once or or twice in storm mode
> and a few less elevations in clear air mode.
>
>
>
> Now, the interesting thing that's on the horizon is Phased Array Radar.
> When that happens, more data, more resolution, and faster updates.
>
>
>
> gerry
>
>
>
> On Tue, Dec 10, 2013 at 11:05 AM, Basques, Bob (CI-StPaul) <
> bob.basques at ci.stpaul.mn.us> wrote:
>
> Gerry,
>
>
>
> Seems like the biggest hangup would be in adding the data to the DB fast
> enough.  How many points, per revolution, and what is the frequency of a
> revolution (stationary Radar, correct, although as I think about it, it
> could be mobile if needed, just need to add in the radar location to each
> record)?
>
>
>
> Bobb
>
>
>
>
>
>
>
> *From:* postgis-users-bounces at lists.osgeo.org [mailto:
> postgis-users-bounces at lists.osgeo.org] *On Behalf Of *Gerry Creager -
> NOAA Affiliate
> *Sent:* Tuesday, December 10, 2013 10:52 AM
> *To:* PostGIS Users Discussion
> *Subject:* [postgis-users] Old question resurfacing
>
>
>
> I asked this years ago, and I think Paul was less than pleased with me
> (:-), but:
>
>
>
> Has anyone, in the ensuing years looked at encoding radar data into a
> postGIS database? We've a little idea that might benefit one project, and
> getting the radar data into a good geospatial format would be
> beneficial.The data, of coure, would start out as radial-distance and
> intensity from the radar site, although we could preprocess it by gridding.
>
>
>
> Thanks, Gerry
>
> --
>
> Gerry Creager
>
> NSSL/CIMMS
>
> 405.325.6371
>
> ++++++++++++++++++++++
>
> “Big whorls have little whorls,
>
> That feed on their velocity;
>
> And little whorls have lesser whorls,
>
> And so on to viscosity.”
>
> Lewis Fry Richardson (1881-1953)
>
>
> _______________________________________________
> postgis-users mailing list
> postgis-users at lists.osgeo.org
> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
>
>
>
>
>
> --
>
> Gerry Creager
>
> NSSL/CIMMS
>
> 405.325.6371
>
> ++++++++++++++++++++++
>
> “Big whorls have little whorls,
>
> That feed on their velocity;
>
> And little whorls have lesser whorls,
>
> And so on to viscosity.”
>
> Lewis Fry Richardson (1881-1953)
>
> _______________________________________________
> postgis-users mailing list
> postgis-users at lists.osgeo.org
> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
>



-- 
Gerry Creager
NSSL/CIMMS
405.325.6371
++++++++++++++++++++++
“Big whorls have little whorls,
That feed on their velocity;
And little whorls have lesser whorls,
And so on to viscosity.”
Lewis Fry Richardson (1881-1953)
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