[Met_help] [rt.rap.ucar.edu #90496] History for MODE
Randy Bullock via RT
met_help at ucar.edu
Wed Jul 24 10:18:46 MDT 2019
----------------------------------------------------------------
Initial Request
----------------------------------------------------------------
Hi!
I have some questions about MODE.
In aranda_data, I put the configure file and a postscript file.
1) Interest Function:
I use the same Interest Function configure that in the configure default.
I know that to calculate the total interest equation I need the
information to the Interest maps and the confidence maps for attributes. is
the interest function that appears in the MODE configuration file, the same
that the Interest maps defined in the METv7.0 User's Guide (page 267)?
where I could find information about the confidence maps? METv7.0 User's
Guide says: all of the confidence maps except the map for axis angle are
set to a constant value of 1 and this is because the axis angle attribute
depends on the the aspect ratio. How can I see the confidence maps in the
MODE configuration file?
Also, I read *The Method for Object-Based Diagnostic Evaluation (MODE)
Applied to Numerical Forecasts from the 2005 NSSL/SPC Spring Program* paper
and in this paper, in the Appendix A, there is an Interest maps graphic. Is
this the interest maps that MET v7.0 use to describe the objects or is for
an specific case?
2) angle difference:
the angle difference is the difference between two axis objects. In my case
I want to verify the precipitation WRF model and for that I compare these
with the precipitation estimates from the IMERG FR.
In the postscript, for the cluster number , the angle difference is 3,25°.
So is this the angle that the long axis of the WRF object makes with
respect to the IMERG object? Could I say that the forecast object is
northern than the observation object? and if the forecast object is in the
south respect to the observation object?
Thanks,
Natalí
----------------------------------------------------------------
Complete Ticket History
----------------------------------------------------------------
Subject: MODE
From: Minna Win
Time: Thu Jun 06 09:05:58 2019
Hello Natali,
It looks like you have some questions about MODE. This ticket is
being
assigned to Randy Bullock, our resident MODE and MODE TD expert.
Please
allow a few days for a full response. Thank you for your patience.
Regards,
Minna
---------------
Minna Win
NCAR
Research Applications Lab
Phone: 303-497-8423
Fax: 303-497-8401
On Wed, Jun 5, 2019 at 7:02 PM natali aranda via RT
<met_help at ucar.edu>
wrote:
>
> Wed Jun 05 19:01:51 2019: Request 90496 was acted upon.
> Transaction: Ticket created by natali.g.aranda at gmail.com
> Queue: met_help
> Subject: MODE
> Owner: Nobody
> Requestors: natali.g.aranda at gmail.com
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90496 >
>
>
> Hi!
>
> I have some questions about MODE.
> In aranda_data, I put the configure file and a postscript file.
>
> 1) Interest Function:
> I use the same Interest Function configure that in the configure
default.
> I know that to calculate the total interest equation I need the
> information to the Interest maps and the confidence maps for
attributes. is
> the interest function that appears in the MODE configuration file,
the same
> that the Interest maps defined in the METv7.0 User's Guide (page
267)?
>
> where I could find information about the confidence maps? METv7.0
User's
> Guide says: all of the confidence maps except the map for axis angle
are
> set to a constant value of 1 and this is because the axis angle
attribute
> depends on the the aspect ratio. How can I see the confidence maps
in the
> MODE configuration file?
>
> Also, I read *The Method for Object-Based Diagnostic Evaluation
(MODE)
> Applied to Numerical Forecasts from the 2005 NSSL/SPC Spring
Program* paper
> and in this paper, in the Appendix A, there is an Interest maps
graphic. Is
> this the interest maps that MET v7.0 use to describe the objects or
is for
> an specific case?
>
> 2) angle difference:
> the angle difference is the difference between two axis objects. In
my case
> I want to verify the precipitation WRF model and for that I compare
these
> with the precipitation estimates from the IMERG FR.
>
> In the postscript, for the cluster number , the angle difference is
3,25°.
> So is this the angle that the long axis of the WRF object makes
with
> respect to the IMERG object? Could I say that the forecast object is
> northern than the observation object? and if the forecast object is
in the
> south respect to the observation object?
>
>
> Thanks,
>
> Natalí
>
>
------------------------------------------------
Subject: MODE
From: Randy Bullock
Time: Fri Jun 07 12:52:45 2019
Hi Natali -
You asked a lot of questions in your email. Let me see if I can
answer
them for you.
First of all, there isn't much information about the confidence maps
that
MODE uses, simply because (to my knowledge) nobody ever changes them.
That
said, however, you can certainly change them if you want to. The
confidence maps are piecewise linear functions (see wikipedia link
here
<https://en.wikipedia.org/wiki/Piecewise_linear_function> for more
information on these), and so in the MODE config file, we just list
the
corner points (x, y) on the graph of the function, and the code (C++
class,
actually) that encapsulates them knows that it needs to do linear
interpolation between the given corner points.
The interest map graphics in the journal article you mentioned were
tuned
for that specific case, and are probably not the MODE default maps.
The axis angle is the (arctangent of the) slope of a line fitted to
the
object. If you have two objects, then you have two axis lines, and
the
axis angle difference is the smaller of the two angles that the lines
make
when they intersect.
As for saying that one object is more northerly (or southerly) than
another
object, I think that the object centroid might be a better way to
measure
this, rather than the axis.
Hope this helps.
Randy Bullock
On Wed, Jun 5, 2019 at 7:02 PM natali aranda via RT
<met_help at ucar.edu>
wrote:
>
> Wed Jun 05 19:01:51 2019: Request 90496 was acted upon.
> Transaction: Ticket created by natali.g.aranda at gmail.com
> Queue: met_help
> Subject: MODE
> Owner: Nobody
> Requestors: natali.g.aranda at gmail.com
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90496 >
>
>
> Hi!
>
> I have some questions about MODE.
> In aranda_data, I put the configure file and a postscript file.
>
> 1) Interest Function:
> I use the same Interest Function configure that in the configure
default.
> I know that to calculate the total interest equation I need the
> information to the Interest maps and the confidence maps for
attributes. is
> the interest function that appears in the MODE configuration file,
the same
> that the Interest maps defined in the METv7.0 User's Guide (page
267)?
>
> where I could find information about the confidence maps? METv7.0
User's
> Guide says: all of the confidence maps except the map for axis angle
are
> set to a constant value of 1 and this is because the axis angle
attribute
> depends on the the aspect ratio. How can I see the confidence maps
in the
> MODE configuration file?
>
> Also, I read *The Method for Object-Based Diagnostic Evaluation
(MODE)
> Applied to Numerical Forecasts from the 2005 NSSL/SPC Spring
Program* paper
> and in this paper, in the Appendix A, there is an Interest maps
graphic. Is
> this the interest maps that MET v7.0 use to describe the objects or
is for
> an specific case?
>
> 2) angle difference:
> the angle difference is the difference between two axis objects. In
my case
> I want to verify the precipitation WRF model and for that I compare
these
> with the precipitation estimates from the IMERG FR.
>
> In the postscript, for the cluster number , the angle difference is
3,25°.
> So is this the angle that the long axis of the WRF object makes
with
> respect to the IMERG object? Could I say that the forecast object is
> northern than the observation object? and if the forecast object is
in the
> south respect to the observation object?
>
>
> Thanks,
>
> Natalí
>
>
------------------------------------------------
Subject: MODE
From: natali aranda
Time: Fri Jul 12 14:52:15 2019
Thanks Randy!
It's helped to me to understand the axis angle attribute and the
interest
maps.
I still a bit confuse with the confidence maps.
In the MET Users Guide V7, it says that all of the confidence maps
except
the map for axis angle are set to a constant value of 1. The axis
angle
confidence map is a function of aspect ratio, with values near one
having
low confidence, and values far from one having high confidence.
Also, I read a document about MODE (NCAR Technical Notes NCAR/TN-
532+STR)
and it says that the currently MODE only uses two confidence maps: one
for
axis angle and another
for centroid distance. And the axis angle depends on the aspect ratio
(ec
4.1, page 48)
I use the MODE V7. So, I understand MODE uses confidence maps only
for the
axis angle an for the centroid distance. The map for the centroid
distance
is a constant value of 1 and
the maps for the axis angle depends on the aspect ratio, it is ok?
Thanks for your help,
Natalí
El vie., 7 jun. 2019 a las 15:52, Randy Bullock via RT
(<met_help at ucar.edu>)
escribió:
> Hi Natali -
>
> You asked a lot of questions in your email. Let me see if I can
answer
> them for you.
>
> First of all, there isn't much information about the confidence maps
that
> MODE uses, simply because (to my knowledge) nobody ever changes
them. That
> said, however, you can certainly change them if you want to. The
> confidence maps are piecewise linear functions (see wikipedia link
here
> <https://en.wikipedia.org/wiki/Piecewise_linear_function> for more
> information on these), and so in the MODE config file, we just list
the
> corner points (x, y) on the graph of the function, and the code (C++
class,
> actually) that encapsulates them knows that it needs to do linear
> interpolation between the given corner points.
>
> The interest map graphics in the journal article you mentioned were
tuned
> for that specific case, and are probably not the MODE default maps.
>
> The axis angle is the (arctangent of the) slope of a line fitted to
the
> object. If you have two objects, then you have two axis lines, and
the
> axis angle difference is the smaller of the two angles that the
lines make
> when they intersect.
>
> As for saying that one object is more northerly (or southerly) than
another
> object, I think that the object centroid might be a better way to
measure
> this, rather than the axis.
>
> Hope this helps.
>
> Randy Bullock
>
> On Wed, Jun 5, 2019 at 7:02 PM natali aranda via RT
<met_help at ucar.edu>
> wrote:
>
> >
> > Wed Jun 05 19:01:51 2019: Request 90496 was acted upon.
> > Transaction: Ticket created by natali.g.aranda at gmail.com
> > Queue: met_help
> > Subject: MODE
> > Owner: Nobody
> > Requestors: natali.g.aranda at gmail.com
> > Status: new
> > Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90496 >
> >
> >
> > Hi!
> >
> > I have some questions about MODE.
> > In aranda_data, I put the configure file and a postscript file.
> >
> > 1) Interest Function:
> > I use the same Interest Function configure that in the configure
> default.
> > I know that to calculate the total interest equation I need the
> > information to the Interest maps and the confidence maps for
attributes.
> is
> > the interest function that appears in the MODE configuration file,
the
> same
> > that the Interest maps defined in the METv7.0 User's Guide (page
267)?
> >
> > where I could find information about the confidence maps? METv7.0
User's
> > Guide says: all of the confidence maps except the map for axis
angle are
> > set to a constant value of 1 and this is because the axis angle
attribute
> > depends on the the aspect ratio. How can I see the confidence maps
in the
> > MODE configuration file?
> >
> > Also, I read *The Method for Object-Based Diagnostic Evaluation
(MODE)
> > Applied to Numerical Forecasts from the 2005 NSSL/SPC Spring
Program*
> paper
> > and in this paper, in the Appendix A, there is an Interest maps
graphic.
> Is
> > this the interest maps that MET v7.0 use to describe the objects
or is
> for
> > an specific case?
> >
> > 2) angle difference:
> > the angle difference is the difference between two axis objects.
In my
> case
> > I want to verify the precipitation WRF model and for that I
compare these
> > with the precipitation estimates from the IMERG FR.
> >
> > In the postscript, for the cluster number , the angle difference
is
> 3,25°.
> > So is this the angle that the long axis of the WRF object makes
with
> > respect to the IMERG object? Could I say that the forecast object
is
> > northern than the observation object? and if the forecast object
is in
> the
> > south respect to the observation object?
> >
> >
> > Thanks,
> >
> > Natalí
> >
> >
>
>
------------------------------------------------
Subject: MODE
From: Randy Bullock
Time: Thu Jul 18 12:13:16 2019
Hi again -
Sorry for the delay in getting back to you.
Anyway, all confidence maps except those for angle difference (ie,
axis angle difference) and centroid distance are just the constant
function equal to one. The confidence map for angle difference
depends on the aspect ratios of both the forecast and observed
objects. The confidence map for centroid distance depends on the
ratio of areas for the two objects.
Hope this helps.
Randy
On Fri Jul 12 14:52:15 2019, natali.g.aranda at gmail.com wrote:
> Thanks Randy!
>
> It's helped to me to understand the axis angle attribute and the
> interest
> maps.
>
> I still a bit confuse with the confidence maps.
>
> In the MET Users Guide V7, it says that all of the confidence maps
> except
> the map for axis angle are set to a constant value of 1. The axis
> angle
> confidence map is a function of aspect ratio, with values near one
> having
> low confidence, and values far from one having high confidence.
> Also, I read a document about MODE (NCAR Technical Notes NCAR/TN-
> 532+STR)
> and it says that the currently MODE only uses two confidence maps:
one
> for
> axis angle and another
> for centroid distance. And the axis angle depends on the aspect
ratio
> (ec
> 4.1, page 48)
>
> I use the MODE V7. So, I understand MODE uses confidence maps only
> for the
> axis angle an for the centroid distance. The map for the centroid
> distance
> is a constant value of 1 and
> the maps for the axis angle depends on the aspect ratio, it is ok?
>
>
> Thanks for your help,
>
> Natalí
>
> El vie., 7 jun. 2019 a las 15:52, Randy Bullock via RT
> (<met_help at ucar.edu>)
> escribió:
>
> > Hi Natali -
> >
> > You asked a lot of questions in your email. Let me see if I can
> > answer
> > them for you.
> >
> > First of all, there isn't much information about the confidence
maps
> > that
> > MODE uses, simply because (to my knowledge) nobody ever changes
them.
> > That
> > said, however, you can certainly change them if you want to. The
> > confidence maps are piecewise linear functions (see wikipedia link
> > here
> > <https://en.wikipedia.org/wiki/Piecewise_linear_function> for more
> > information on these), and so in the MODE config file, we just
list
> > the
> > corner points (x, y) on the graph of the function, and the code
(C++
> > class,
> > actually) that encapsulates them knows that it needs to do linear
> > interpolation between the given corner points.
> >
> > The interest map graphics in the journal article you mentioned
were
> > tuned
> > for that specific case, and are probably not the MODE default
maps.
> >
> > The axis angle is the (arctangent of the) slope of a line fitted
to
> > the
> > object. If you have two objects, then you have two axis lines,
and
> > the
> > axis angle difference is the smaller of the two angles that the
lines
> > make
> > when they intersect.
> >
> > As for saying that one object is more northerly (or southerly)
than
> > another
> > object, I think that the object centroid might be a better way to
> > measure
> > this, rather than the axis.
> >
> > Hope this helps.
> >
> > Randy Bullock
> >
> > On Wed, Jun 5, 2019 at 7:02 PM natali aranda via RT
> > <met_help at ucar.edu>
> > wrote:
> >
> > >
> > > Wed Jun 05 19:01:51 2019: Request 90496 was acted upon.
> > > Transaction: Ticket created by natali.g.aranda at gmail.com
> > > Queue: met_help
> > > Subject: MODE
> > > Owner: Nobody
> > > Requestors: natali.g.aranda at gmail.com
> > > Status: new
> > > Ticket <URL:
> > > https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90496 >
> > >
> > >
> > > Hi!
> > >
> > > I have some questions about MODE.
> > > In aranda_data, I put the configure file and a postscript file.
> > >
> > > 1) Interest Function:
> > > I use the same Interest Function configure that in the
configure
> > default.
> > > I know that to calculate the total interest equation I need the
> > > information to the Interest maps and the confidence maps for
> > > attributes.
> > is
> > > the interest function that appears in the MODE configuration
file,
> > > the
> > same
> > > that the Interest maps defined in the METv7.0 User's Guide
(page
> > > 267)?
> > >
> > > where I could find information about the confidence maps?
METv7.0
> > > User's
> > > Guide says: all of the confidence maps except the map for axis
> > > angle are
> > > set to a constant value of 1 and this is because the axis angle
> > > attribute
> > > depends on the the aspect ratio. How can I see the confidence
maps
> > > in the
> > > MODE configuration file?
> > >
> > > Also, I read *The Method for Object-Based Diagnostic Evaluation
> > > (MODE)
> > > Applied to Numerical Forecasts from the 2005 NSSL/SPC Spring
> > > Program*
> > paper
> > > and in this paper, in the Appendix A, there is an Interest maps
> > > graphic.
> > Is
> > > this the interest maps that MET v7.0 use to describe the objects
or
> > > is
> > for
> > > an specific case?
> > >
> > > 2) angle difference:
> > > the angle difference is the difference between two axis objects.
In
> > > my
> > case
> > > I want to verify the precipitation WRF model and for that I
compare
> > > these
> > > with the precipitation estimates from the IMERG FR.
> > >
> > > In the postscript, for the cluster number , the angle
difference
> > > is
> > 3,25°.
> > > So is this the angle that the long axis of the WRF object makes
> > > with
> > > respect to the IMERG object? Could I say that the forecast
object
> > > is
> > > northern than the observation object? and if the forecast object
is
> > > in
> > the
> > > south respect to the observation object?
> > >
> > >
> > > Thanks,
> > >
> > > Natalí
> > >
> > >
> >
> >
------------------------------------------------
Subject: MODE
From: Randy Bullock
Time: Wed Jul 24 10:18:45 2019
Resolved
------------------------------------------------
More information about the Met_help
mailing list