[Met_help] [rt.rap.ucar.edu #80354] History for Ability for MTD to Handle QPF Object Splitting
Julie Prestopnik via RT
met_help at ucar.edu
Thu Jun 1 15:00:34 MDT 2017
----------------------------------------------------------------
Initial Request
----------------------------------------------------------------
Good afternoon,
I have made some progress with MET thanks to your group. Thank you!
I am currently exploring the West Virginia flooding event from June 2016
using MTD. This is a particularly difficult event to track, but the
observation exhibits QPF object splitting, with one object moving rapidly
from WV into the Atlantic Ocean, and the other object remaining over WV. I
have included an animation to visualize my example. The dark blue line is
the Stage IV analysis centroid, while the black outline is the outline of
the Stage IV analysis. A HRRR Experimental model is also included in the
thin black line (centroid) and shading (object outline). Both exhibit
similar behaviour.
My question is, is there anyway to show the QPF object splitting? If not,
is there anyway to correct the illusion that the QPF object suddenly
changed direction from moving southeast to moving due west? I've changed
the settings in the namelist to:
space_centroid_dist = 5.0;
time_centroid_delta = 2.0;
speed_delta = 2.0;
direction_diff = 1.0;
volume_ratio = 2.0;
axis_angle_diff = 1.0;
start_time_delta = 2.0;
end_time_delta = 2.0;
Thank you!
Mike
--
Michael J. Erickson, Ph.D
Cooperative Institute for Research in Environmental Sciences (CIRES)
CIRES Contractor for the Weather Prediction Center (WPC)
Phone: 301-683-1546
----------------------------------------------------------------
Complete Ticket History
----------------------------------------------------------------
Subject: Ability for MTD to Handle QPF Object Splitting
From: Randy Bullock
Time: Thu May 04 12:01:06 2017
Hello Michael -
The current release of MTD is a simple beta release, mostly to get
people
to feed back ideas and comments to us. There currently isn't a nice
way to
accomplish what you described in your email. Basically you have an
object
that branches or splits, and you want to follow one branch in
preference to
the other. I think that for now, with MTD's current capabilities, the
only
way to illustrate your point is to make a 3D plot, so people can see
the 3D
object branching.
Splitting a 3D object into branches and calculating centroids,
velocities,
etc, for each branch is probably a good idea, though ... I'll see if
we can
work that into a future release of MTD (which doesn't help you at all
right
now, I know).
Hope this helps.
Randy Bullock
On Wed, May 3, 2017 at 2:26 PM, Michael Erickson - NOAA Affiliate via
RT <
met_help at ucar.edu> wrote:
>
> Wed May 03 14:26:23 2017: Request 80354 was acted upon.
> Transaction: Ticket created by michael.j.erickson at noaa.gov
> Queue: met_help
> Subject: Ability for MTD to Handle QPF Object Splitting
> Owner: Nobody
> Requestors: michael.j.erickson at noaa.gov
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=80354 >
>
>
> Good afternoon,
>
> I have made some progress with MET thanks to your group. Thank you!
>
> I am currently exploring the West Virginia flooding event from June
2016
> using MTD. This is a particularly difficult event to track, but the
> observation exhibits QPF object splitting, with one object moving
rapidly
> from WV into the Atlantic Ocean, and the other object remaining over
WV. I
> have included an animation to visualize my example. The dark blue
line is
> the Stage IV analysis centroid, while the black outline is the
outline of
> the Stage IV analysis. A HRRR Experimental model is also included in
the
> thin black line (centroid) and shading (object outline). Both
exhibit
> similar behaviour.
>
> My question is, is there anyway to show the QPF object splitting? If
not,
> is there anyway to correct the illusion that the QPF object suddenly
> changed direction from moving southeast to moving due west? I've
changed
> the settings in the namelist to:
>
> space_centroid_dist = 5.0;
>
> time_centroid_delta = 2.0;
>
> speed_delta = 2.0;
>
> direction_diff = 1.0;
>
> volume_ratio = 2.0;
>
> axis_angle_diff = 1.0;
>
> start_time_delta = 2.0;
>
> end_time_delta = 2.0;
>
>
> Thank you!
>
>
> Mike
> --
>
> Michael J. Erickson, Ph.D
> Cooperative Institute for Research in Environmental Sciences (CIRES)
> CIRES Contractor for the Weather Prediction Center (WPC)
>
> Phone: 301-683-1546
>
>
------------------------------------------------
Subject: Ability for MTD to Handle QPF Object Splitting
From: Michael Erickson - NOAA Affiliate
Time: Thu May 04 14:13:14 2017
Thanks Randy,
WPC and myself would definitely be interested in a future MTD that
considers object splitting and merging.
On a related note, I was wondering if you have a more detailed
documentation on the tunable parameters in the MTD config file,
specifically in the "interest_function" section? I've read section
15.2,
but I am still a bit unclear if I need to play with these parameters.
Thanks!
Mike
*interest_function = { centroid_dist = ( ( 0.0, 1.0
) ( 60.0/grid_res, 1.0 ) ( 600.0/grid_res, 0.0 ) );
boundary_dist = ( ( 0.0, 1.0 ) ( 400.0/grid_res,
0.0
) ); convex_hull_dist = ( ( 0.0, 1.0 ) (
400.0/grid_res, 0.0 ) ); angle_diff = ( ( 0.0, 1.0 ) (
30.0,
1.0 ) ( 90.0, 0.0 ) ); corner = 0.8; ratio_if = ( (
0.0, 0.0 ) ( corner, 1.0 ) ( 1.0, 1.0 ) ); area_ratio
=
ratio_if; int_area_ratio = ( ( 0.00, 0.00 ) ( 0.10, 0.50 )
( 0.25, 1.00 ) ( 1.00, 1.00 ) ); complexity_ratio = ratio_if;
inten_perc_ratio = ratio_if;}*
On Thu, May 4, 2017 at 6:01 PM, Randy Bullock via RT
<met_help at ucar.edu>
wrote:
> Hello Michael -
>
> The current release of MTD is a simple beta release, mostly to get
people
> to feed back ideas and comments to us. There currently isn't a nice
way to
> accomplish what you described in your email. Basically you have an
object
> that branches or splits, and you want to follow one branch in
preference to
> the other. I think that for now, with MTD's current capabilities,
the only
> way to illustrate your point is to make a 3D plot, so people can see
the 3D
> object branching.
>
> Splitting a 3D object into branches and calculating centroids,
velocities,
> etc, for each branch is probably a good idea, though ... I'll see if
we can
> work that into a future release of MTD (which doesn't help you at
all right
> now, I know).
>
> Hope this helps.
>
> Randy Bullock
>
> On Wed, May 3, 2017 at 2:26 PM, Michael Erickson - NOAA Affiliate
via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Wed May 03 14:26:23 2017: Request 80354 was acted upon.
> > Transaction: Ticket created by michael.j.erickson at noaa.gov
> > Queue: met_help
> > Subject: Ability for MTD to Handle QPF Object Splitting
> > Owner: Nobody
> > Requestors: michael.j.erickson at noaa.gov
> > Status: new
> > Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=80354 >
> >
> >
> > Good afternoon,
> >
> > I have made some progress with MET thanks to your group. Thank
you!
> >
> > I am currently exploring the West Virginia flooding event from
June 2016
> > using MTD. This is a particularly difficult event to track, but
the
> > observation exhibits QPF object splitting, with one object moving
rapidly
> > from WV into the Atlantic Ocean, and the other object remaining
over WV.
> I
> > have included an animation to visualize my example. The dark blue
line is
> > the Stage IV analysis centroid, while the black outline is the
outline of
> > the Stage IV analysis. A HRRR Experimental model is also included
in the
> > thin black line (centroid) and shading (object outline). Both
exhibit
> > similar behaviour.
> >
> > My question is, is there anyway to show the QPF object splitting?
If not,
> > is there anyway to correct the illusion that the QPF object
suddenly
> > changed direction from moving southeast to moving due west? I've
changed
> > the settings in the namelist to:
> >
> > space_centroid_dist = 5.0;
> >
> > time_centroid_delta = 2.0;
> >
> > speed_delta = 2.0;
> >
> > direction_diff = 1.0;
> >
> > volume_ratio = 2.0;
> >
> > axis_angle_diff = 1.0;
> >
> > start_time_delta = 2.0;
> >
> > end_time_delta = 2.0;
> >
> >
> > Thank you!
> >
> >
> > Mike
> > --
> >
> > Michael J. Erickson, Ph.D
> > Cooperative Institute for Research in Environmental Sciences
(CIRES)
> > CIRES Contractor for the Weather Prediction Center (WPC)
> >
> > Phone: 301-683-1546
> >
> >
>
>
--
Michael J. Erickson, Ph.D
Cooperative Institute for Research in Environmental Sciences (CIRES)
CIRES Contractor for the Weather Prediction Center (WPC)
Phone: 301-683-1546
------------------------------------------------
Subject: Ability for MTD to Handle QPF Object Splitting
From: Randy Bullock
Time: Thu May 04 14:23:39 2017
Hi again Michael -
The interest maps in the MTD config file are used and defined in the
same
way as in the MODE config file, so you could look at the MODE chapter
of
the MET users guide for a little more info.
Here's what the stuff in the config file means: Basically, the
interest
maps are piecewise linear functions, which means their graphs consist
of
straight line segments. So the definition in the config file is
basically
a consecutive list of the (x, y) corner points on the graph where
adjacent
line segments connect.
Hope this helps.
Randy
On Thu, May 4, 2017 at 2:13 PM, Michael Erickson - NOAA Affiliate via
RT <
met_help at ucar.edu> wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=80354 >
>
> Thanks Randy,
>
> WPC and myself would definitely be interested in a future MTD that
> considers object splitting and merging.
>
> On a related note, I was wondering if you have a more detailed
> documentation on the tunable parameters in the MTD config file,
> specifically in the "interest_function" section? I've read section
15.2,
> but I am still a bit unclear if I need to play with these
parameters.
> Thanks!
>
> Mike
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> *interest_function = { centroid_dist = ( ( 0.0,
1.0
> ) ( 60.0/grid_res, 1.0 ) ( 600.0/grid_res, 0.0 ) );
> boundary_dist = ( ( 0.0, 1.0 ) (
400.0/grid_res, 0.0
> ) ); convex_hull_dist = ( ( 0.0, 1.0 ) (
> 400.0/grid_res, 0.0 ) ); angle_diff = ( ( 0.0, 1.0 )
( 30.0,
> 1.0 ) ( 90.0, 0.0 ) ); corner = 0.8; ratio_if = (
(
> 0.0, 0.0 ) ( corner, 1.0 ) ( 1.0, 1.0 ) );
area_ratio =
> ratio_if; int_area_ratio = ( ( 0.00, 0.00 ) ( 0.10, 0.50
)
> ( 0.25, 1.00 ) ( 1.00, 1.00 ) ); complexity_ratio =
ratio_if;
> inten_perc_ratio = ratio_if;}*
>
>
>
>
>
> On Thu, May 4, 2017 at 6:01 PM, Randy Bullock via RT
<met_help at ucar.edu>
> wrote:
>
> > Hello Michael -
> >
> > The current release of MTD is a simple beta release, mostly to get
people
> > to feed back ideas and comments to us. There currently isn't a
nice way
> to
> > accomplish what you described in your email. Basically you have
an
> object
> > that branches or splits, and you want to follow one branch in
preference
> to
> > the other. I think that for now, with MTD's current capabilities,
the
> only
> > way to illustrate your point is to make a 3D plot, so people can
see the
> 3D
> > object branching.
> >
> > Splitting a 3D object into branches and calculating centroids,
> velocities,
> > etc, for each branch is probably a good idea, though ... I'll see
if we
> can
> > work that into a future release of MTD (which doesn't help you at
all
> right
> > now, I know).
> >
> > Hope this helps.
> >
> > Randy Bullock
> >
> > On Wed, May 3, 2017 at 2:26 PM, Michael Erickson - NOAA Affiliate
via RT
> <
> > met_help at ucar.edu> wrote:
> >
> > >
> > > Wed May 03 14:26:23 2017: Request 80354 was acted upon.
> > > Transaction: Ticket created by michael.j.erickson at noaa.gov
> > > Queue: met_help
> > > Subject: Ability for MTD to Handle QPF Object Splitting
> > > Owner: Nobody
> > > Requestors: michael.j.erickson at noaa.gov
> > > Status: new
> > > Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=80354
> >
> > >
> > >
> > > Good afternoon,
> > >
> > > I have made some progress with MET thanks to your group. Thank
you!
> > >
> > > I am currently exploring the West Virginia flooding event from
June
> 2016
> > > using MTD. This is a particularly difficult event to track, but
the
> > > observation exhibits QPF object splitting, with one object
moving
> rapidly
> > > from WV into the Atlantic Ocean, and the other object remaining
over
> WV.
> > I
> > > have included an animation to visualize my example. The dark
blue line
> is
> > > the Stage IV analysis centroid, while the black outline is the
outline
> of
> > > the Stage IV analysis. A HRRR Experimental model is also
included in
> the
> > > thin black line (centroid) and shading (object outline). Both
exhibit
> > > similar behaviour.
> > >
> > > My question is, is there anyway to show the QPF object
splitting? If
> not,
> > > is there anyway to correct the illusion that the QPF object
suddenly
> > > changed direction from moving southeast to moving due west? I've
> changed
> > > the settings in the namelist to:
> > >
> > > space_centroid_dist = 5.0;
> > >
> > > time_centroid_delta = 2.0;
> > >
> > > speed_delta = 2.0;
> > >
> > > direction_diff = 1.0;
> > >
> > > volume_ratio = 2.0;
> > >
> > > axis_angle_diff = 1.0;
> > >
> > > start_time_delta = 2.0;
> > >
> > > end_time_delta = 2.0;
> > >
> > >
> > > Thank you!
> > >
> > >
> > > Mike
> > > --
> > >
> > > Michael J. Erickson, Ph.D
> > > Cooperative Institute for Research in Environmental Sciences
(CIRES)
> > > CIRES Contractor for the Weather Prediction Center (WPC)
> > >
> > > Phone: 301-683-1546
> > >
> > >
> >
> >
>
>
> --
>
> Michael J. Erickson, Ph.D
> Cooperative Institute for Research in Environmental Sciences (CIRES)
> CIRES Contractor for the Weather Prediction Center (WPC)
>
> Phone: 301-683-1546
>
>
------------------------------------------------
Subject: Ability for MTD to Handle QPF Object Splitting
From: Michael Erickson - NOAA Affiliate
Time: Thu May 04 14:26:11 2017
Hi Randy,
Thanks! That makes sense. I am good if you'd like to close the ticket.
Mike
On Thu, May 4, 2017 at 8:23 PM, Randy Bullock via RT
<met_help at ucar.edu>
wrote:
> Hi again Michael -
>
> The interest maps in the MTD config file are used and defined in the
same
> way as in the MODE config file, so you could look at the MODE
chapter of
> the MET users guide for a little more info.
>
> Here's what the stuff in the config file means: Basically, the
interest
> maps are piecewise linear functions, which means their graphs
consist of
> straight line segments. So the definition in the config file is
basically
> a consecutive list of the (x, y) corner points on the graph where
adjacent
> line segments connect.
>
> Hope this helps.
>
> Randy
>
> On Thu, May 4, 2017 at 2:13 PM, Michael Erickson - NOAA Affiliate
via RT <
> met_help at ucar.edu> wrote:
>
> >
> > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=80354 >
> >
> > Thanks Randy,
> >
> > WPC and myself would definitely be interested in a future MTD that
> > considers object splitting and merging.
> >
> > On a related note, I was wondering if you have a more detailed
> > documentation on the tunable parameters in the MTD config file,
> > specifically in the "interest_function" section? I've read section
15.2,
> > but I am still a bit unclear if I need to play with these
parameters.
> > Thanks!
> >
> > Mike
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > *interest_function = { centroid_dist = ( ( 0.0,
1.0
> > ) ( 60.0/grid_res, 1.0 ) ( 600.0/grid_res, 0.0 ) );
> > boundary_dist = ( ( 0.0, 1.0 ) (
400.0/grid_res, 0.0
> > ) ); convex_hull_dist = ( ( 0.0, 1.0 ) (
> > 400.0/grid_res, 0.0 ) ); angle_diff = ( ( 0.0, 1.0 )
(
> 30.0,
> > 1.0 ) ( 90.0, 0.0 ) ); corner = 0.8; ratio_if = (
(
> > 0.0, 0.0 ) ( corner, 1.0 ) ( 1.0, 1.0 ) );
area_ratio =
> > ratio_if; int_area_ratio = ( ( 0.00, 0.00 ) ( 0.10,
0.50 )
> > ( 0.25, 1.00 ) ( 1.00, 1.00 ) ); complexity_ratio =
ratio_if;
> > inten_perc_ratio = ratio_if;}*
> >
> >
> >
> >
> >
> > On Thu, May 4, 2017 at 6:01 PM, Randy Bullock via RT
<met_help at ucar.edu>
> > wrote:
> >
> > > Hello Michael -
> > >
> > > The current release of MTD is a simple beta release, mostly to
get
> people
> > > to feed back ideas and comments to us. There currently isn't a
nice
> way
> > to
> > > accomplish what you described in your email. Basically you have
an
> > object
> > > that branches or splits, and you want to follow one branch in
> preference
> > to
> > > the other. I think that for now, with MTD's current
capabilities, the
> > only
> > > way to illustrate your point is to make a 3D plot, so people can
see
> the
> > 3D
> > > object branching.
> > >
> > > Splitting a 3D object into branches and calculating centroids,
> > velocities,
> > > etc, for each branch is probably a good idea, though ... I'll
see if we
> > can
> > > work that into a future release of MTD (which doesn't help you
at all
> > right
> > > now, I know).
> > >
> > > Hope this helps.
> > >
> > > Randy Bullock
> > >
> > > On Wed, May 3, 2017 at 2:26 PM, Michael Erickson - NOAA
Affiliate via
> RT
> > <
> > > met_help at ucar.edu> wrote:
> > >
> > > >
> > > > Wed May 03 14:26:23 2017: Request 80354 was acted upon.
> > > > Transaction: Ticket created by michael.j.erickson at noaa.gov
> > > > Queue: met_help
> > > > Subject: Ability for MTD to Handle QPF Object Splitting
> > > > Owner: Nobody
> > > > Requestors: michael.j.erickson at noaa.gov
> > > > Status: new
> > > > Ticket <URL: https://rt.rap.ucar.edu/rt/
> Ticket/Display.html?id=80354
> > >
> > > >
> > > >
> > > > Good afternoon,
> > > >
> > > > I have made some progress with MET thanks to your group. Thank
you!
> > > >
> > > > I am currently exploring the West Virginia flooding event from
June
> > 2016
> > > > using MTD. This is a particularly difficult event to track,
but the
> > > > observation exhibits QPF object splitting, with one object
moving
> > rapidly
> > > > from WV into the Atlantic Ocean, and the other object
remaining over
> > WV.
> > > I
> > > > have included an animation to visualize my example. The dark
blue
> line
> > is
> > > > the Stage IV analysis centroid, while the black outline is the
> outline
> > of
> > > > the Stage IV analysis. A HRRR Experimental model is also
included in
> > the
> > > > thin black line (centroid) and shading (object outline). Both
exhibit
> > > > similar behaviour.
> > > >
> > > > My question is, is there anyway to show the QPF object
splitting? If
> > not,
> > > > is there anyway to correct the illusion that the QPF object
suddenly
> > > > changed direction from moving southeast to moving due west?
I've
> > changed
> > > > the settings in the namelist to:
> > > >
> > > > space_centroid_dist = 5.0;
> > > >
> > > > time_centroid_delta = 2.0;
> > > >
> > > > speed_delta = 2.0;
> > > >
> > > > direction_diff = 1.0;
> > > >
> > > > volume_ratio = 2.0;
> > > >
> > > > axis_angle_diff = 1.0;
> > > >
> > > > start_time_delta = 2.0;
> > > >
> > > > end_time_delta = 2.0;
> > > >
> > > >
> > > > Thank you!
> > > >
> > > >
> > > > Mike
> > > > --
> > > >
> > > > Michael J. Erickson, Ph.D
> > > > Cooperative Institute for Research in Environmental Sciences
(CIRES)
> > > > CIRES Contractor for the Weather Prediction Center (WPC)
> > > >
> > > > Phone: 301-683-1546
> > > >
> > > >
> > >
> > >
> >
> >
> > --
> >
> > Michael J. Erickson, Ph.D
> > Cooperative Institute for Research in Environmental Sciences
(CIRES)
> > CIRES Contractor for the Weather Prediction Center (WPC)
> >
> > Phone: 301-683-1546
> >
> >
>
>
--
Michael J. Erickson, Ph.D
Cooperative Institute for Research in Environmental Sciences (CIRES)
CIRES Contractor for the Weather Prediction Center (WPC)
Phone: 301-683-1546
------------------------------------------------
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