[Met_help] [rt.rap.ucar.edu #85055] History for about weightage to wi in met package version 5. 2

[John Halley Gotway via RT]

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  Initial Request
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Dear Met_help team,

I am a user of met package version 5.2 and have some questions regarding the MODE package. In met users guide page 202 available via this page.

https://dtcenter.org/met/users/docs/users_guide/MET_Users_Guide_v5.2.pdf


It is talked about the different weightage .

weight = { centroid_dist = 2.0; boundary_dist = 4.0; convex_hull_dist = 0.0; angle_diff = 1.0; area_ratio = 1.0; int_area_ratio = 2.0; complexity_ratio = 0.0; inten_perc_ratio = 0.0; inten_perc_value = 50; }


My question now is;

what is the percentage equivalent of these values because in original Davis et al. (2009) Appendix A, I saw the weightage as percentage.

My next question is on 0.0 value. Does that mean that variable is not used for the interest score calculations?

Thank you very much and look forward for response.

Regards
Ramchandra Karki
PhD Student,
Institute of Geography, University of Hamburg
Bundesstrase 55, Hamburg Germany





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  Complete Ticket History
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Subject: about weightage to wi in met package version 5. 2
From: John Halley Gotway
Time: Thu May 10 14:11:59 2018

Ramchandra,

I see that you have questions about setting up the MODE configuration
file.

As you can see, there are 8 settings that can be used in the
computation of
the total interest value.  The actual weight values can be specified
as any
number.  Inside the code, they are converted to percentages by
dividing the
current weight by the sum of all the weights.

In the example you sent:
   weight = { centroid_dist = 2.0; boundary_dist = 4.0;
convex_hull_dist =
0.0; angle_diff = 1.0; area_ratio = 1.0; int_area_ratio = 2.0;
complexity_ratio = 0.0; inten_perc_ratio = 0.0; inten_perc_value = 50;
}
The sum of the weights is 10.  So centroid_dist (2/10) =
int_area_ratio
(2/10) = 20%, boundary_dist (4/10) = 40%, angle_diff (1/10) =
area_ratio
(1/10) = 10%, and the rest are 0.

Setting the weight to 0 effectively removes that parameter from the
total
interest computation.  This gives users the flexibility to decide
which
object pair attributes are most important in their particular
application
of MODE.

Also, be aware that when you run MODE at a very high verbosity level,
like
-v 5, you get much more detailed logging info describing the
computation of
the total interest.  You may find that useful.  For example, below
you'll
see some sample log messages.

Hope that helps.

Thanks,
John Halley Gotway

Centroid Distance:
------------------
   Value      = 6.520
   Interest   = 0.628
   Confidence = 0.924
   Weight     = 2.000
   Term       = 1.161

Boundary Distance:
------------------
   Value      = 0.000
   Interest   = 1.000
   Confidence = 1.000
   Weight     = 4.000
   Term       = 4.000

Convex Hull Distance:
------------------
   Value      = 0.000
   Interest   = 1.000
   Confidence = 1.000
   Weight     = 0.000
   Term       = 0.000

Angle Difference:
-----------------
   Value      = 57.266
   Interest   = 0.546
   Confidence = 0.446
   Weight     = 1.000
   Term       = 0.243

Area Ratio:
-----------
   Value      = 0.924
   Interest   = 1.000
   Confidence = 1.000
   Weight     = 1.000
   Term       = 1.000

Intersection/Area Ratio:
----------------
   Value      = 0.533
   Interest   = 1.000
   Confidence = 1.000
   Weight     = 2.000
   Term       = 2.000

Complexity Ratio:
-----------------------
   Value      = 0.865
   Interest   = 1.000
   Confidence = 1.000
   Weight     = 0.000
   Term       = 0.000

Percentile (50th) Intensity Ratio:
-----------------------
   Value      = 0.554
   Interest   = 0.692
   Confidence = 1.000
   Weight     = 0.000
   Term       = 0.000

Total Interest = (sum of terms)/(sum of weights*confidence)

               = 8.405/9.295

               = 0.904



On Wed, May 9, 2018 at 10:21 AM, Ramchandra Karki via RT
<met_help at ucar.edu>
wrote:

>
> Wed May 09 10:21:18 2018: Request 85055 was acted upon.
> Transaction: Ticket created by rammetro at hotmail.com
>        Queue: met_help
>      Subject: about weightage to wi in met package version 5. 2
>        Owner: Nobody
>   Requestors: rammetro at hotmail.com
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=85055 >
>
>
> Dear Met_help team,
>
> I am a user of met package version 5.2 and have some questions
regarding
> the MODE package. In met users guide page 202 available via this
page.
>
>
https://dtcenter.org/met/users/docs/users_guide/MET_Users_Guide_v5.2.pdf
>
>
> It is talked about the different weightage .
>
> weight = { centroid_dist = 2.0; boundary_dist = 4.0;
convex_hull_dist =
> 0.0; angle_diff = 1.0; area_ratio = 1.0; int_area_ratio = 2.0;
> complexity_ratio = 0.0; inten_perc_ratio = 0.0; inten_perc_value =
50; }
>
>
> My question now is;
>
> what is the percentage equivalent of these values because in
original
> Davis et al. (2009) Appendix A, I saw the weightage as percentage.
>
> My next question is on 0.0 value. Does that mean that variable is
not used
> for the interest score calculations?
>
> Thank you very much and look forward for response.
>
> Regards
> Ramchandra Karki
> PhD Student,
> Institute of Geography, University of Hamburg
> Bundesstrase 55, Hamburg Germany
>
>
>
>
>

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