[postgis-users] Old question resurfacing

[Basques, Bob (CI-StPaul)]

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<mailto: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> [mailto: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<tel: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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--
Gerry Creager
NSSL/CIMMS
405.325.6371<tel: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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