shrug-l: RE: [ESRI-L] Classification Method question

Nonie Castro nonie_castro@coxtarget.com
Wed, 29 Jun 2005 11:48:56 -0400


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That would still divide the classes by INCOME.
I need the classes divided by the total number of the carrier routes.
(With 125 carrier routes, the each class would contain 25)

The only thing I want the income for is the symbology.

Here is an excerpt from an email I got earlier:=20

	"If you want to make sure that you get an equal (or roughly
equal) number of features in each grouping, then you want
Quantile...just set number of classes to 5."

So that is what I think I need.=20
I need to think of a way to test this - to view the carrier routes that
are in each class and count them.=20
=20


> -----Original Message-----
> From: Carol Boteler [mailto:BotelerC@hillsboroughcounty.org
<mailto:BotelerC@hillsboroughcounty.org> ]
> Sent: Wednesday, June 29, 2005 10:12 AM
> To: Nonie Castro
> Subject: RE: [ESRI-L] Classification Method question
>
> Nonie,
>
> At first I was thinking you would use equal interval - but
> that would divide the income amount into equal divisions. So
> I'm getting confused too.
> After a little thought, I think I would add another field
> where you would calculate the percent of income for each
> route (divide income for the route by the total income, then
> multiply by 100). Then you could use that percentage field as
> the field to divide into five quantiles.
>
> How does that sound?
>
>
> Regards,
> Carol Boteler
> GIS Analyst
> Planning and Growth Management
> Hillsborough County, Florida
> 813-301-7245
>
> >>> "Nonie Castro" <nonie_castro@coxtarget.com> 06/29/05 09:28AM >>>
> Oh - yes, I understand that - but thank you the time you took
> to explain it.
> What I don't understand is which method to choose.
>
> If my territory contains - let's say - 125 carrier routes,
> which method will divide those in to 5 classes where each
> class will have an EQUAL NUMBER (or close enough) of carrier routes?
>
> I want the end user to be able to see at a glance the most
> and least affluent 20% of his territory, and 3 equal
> divisions of 20% in the middle.
>
> My suspicion is that I need the QUANTILE method, but the help
> texts I am reading are confusing.
> Here was a pretty good one, though:
> http://www.farmresearch.com/gis/tutorials/classification.asp
<http://www.farmresearch.com/gis/tutorials/classification.asp>=20
>
> > -----Original Message-----
> > From: Carol Boteler [mailto:BotelerC@hillsboroughcounty.org
<mailto:BotelerC@hillsboroughcounty.org>=20
> <mailto:BotelerC@hillsboroughcounty.org
<mailto:BotelerC@hillsboroughcounty.org> > ]
> > Sent: Wednesday, June 29, 2005 9:13 AM
> > To: Nonie Castro
> > Subject: Re: [ESRI-L] Classification Method question
> >
> > Nonie,
> >
> > You have the Median HH Income data in a field in a geographic data
> > layer? If so, here's how you would show it:
> >
> > Right-click on the layer in the Table of Contents; go down to
> > Properties; click on the Symbology tab; click on Quantities on the
> > left side of the window; under Fields in the middle, go to
> the Value
> > drop-down and select the field name that has the income; in the
> > Classes block enter the number "5"; click on the
> Classify... button;
> > under Classification, for Method drop-down select Equal
> Interval; you
> > can pick a color bar to represent your theme.
> >
> > When you click the OKs to get back to your map you should see your
> > areas colored in five shades. It's a good idea to use high
> intensity
> > color to represent large numbers and low color to represent low
> > numbers. Like for money, your rich areas will be dark green
> and your
> > poor areas will be light green.
> > ...or something like that.
> >
> > Let me know if I can offer more help, I'd be glad to.
> >
> >
> >
> > Regards,
> > Carol Boteler
> > GIS Analyst
> > Planning and Growth Management
> > Hillsborough County, Florida
> > 813-301-7245
> >
> > >>> Nonie Castro <nonie_castro@COXTARGET.COM> 06/27/05 05:43PM >>>
> >         I have a territory of carrier routes.
> >         In the symbology, I want to show five equal
> divisions of the
> > total number of carrier routes, but I want to symbolize on
> the Median
> > HH Income.
> >         (So the user will be able to see at a glance the least
> > affluent 20% and the most affluent 20% of his territory, and the
> > middle 3/5 as
> > well.)
> >
> >         How would I do this?
> >
> >         (I have a screen shot, but was unable to send it. I
> will email
> > it to you if you think it will help.)
> >
> >
>
>
>=20


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<P><FONT face=3D"Trebuchet MS" size=3D2>That would still divide the =
classes by=20
INCOME.<BR>I need the classes divided by the total=20
<STRONG><EM>number</EM></STRONG> of the&nbsp;<SPAN=20
class=3D374424415-29062005>carrier routes</SPAN>.<BR>(With 125 carrier =
routes, the=20
<STRONG><EM>each</EM></STRONG> class would contain 25)<BR><BR>The only =
thing I=20
want the income for is the symbology.</FONT></P>
<DIV><SPAN class=3D374424415-29062005><FONT face=3D"Trebuchet MS" =
size=3D2>Here is an=20
excerpt from an email I got earlier: </FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV><SPAN class=3D374424415-29062005><FONT size=3D2>"If you want to =
make sure=20
  that you get an equal (or roughly equal) number of features in each =
grouping,=20
  then you want Quantile&#8230;just set number of classes to=20
5."</FONT></SPAN></DIV></BLOCKQUOTE>
<DIV><FONT face=3D"Trebuchet MS" size=3D2><SPAN =
class=3D374424415-29062005>So that is=20
what I think I need. </SPAN></FONT></DIV>
<DIV><FONT face=3D"Trebuchet MS" size=3D2><SPAN =
class=3D374424415-29062005>I need to=20
think of a way to test this - to view the carrier routes that are in =
each class=20
and count them. </SPAN></FONT></DIV>
<DIV><FONT face=3D"Trebuchet MS" size=3D2></FONT>&nbsp;</DIV>
<P><BR><FONT face=3D"Trebuchet MS" size=3D2>&gt; -----Original =
Message-----<BR>&gt;=20
From: Carol Boteler [</FONT><A=20
href=3D"mailto:BotelerC@hillsboroughcounty.org"><FONT face=3D"Trebuchet =
MS"=20
size=3D2>mailto:BotelerC@hillsboroughcounty.org</FONT></A><FONT=20
face=3D"Trebuchet MS" size=3D2>]<BR>&gt; Sent: Wednesday, June 29, 2005 =
10:12=20
AM<BR>&gt; To: Nonie Castro<BR>&gt; Subject: RE: [ESRI-L] Classification =
Method=20
question<BR>&gt;<BR>&gt; Nonie,<BR>&gt;<BR>&gt; At first I was thinking =
you=20
would use equal interval - but<BR>&gt; that would divide the income =
amount into=20
equal divisions. So<BR>&gt; I'm getting confused too.<BR>&gt; After a =
little=20
thought, I think I would add another field<BR>&gt; where you would =
calculate the=20
percent of income for each<BR>&gt; route (divide income for the route by =
the=20
total income, then<BR>&gt; multiply by 100). Then you could use that =
percentage=20
field as<BR>&gt; the field to divide into five =
quantiles.<BR>&gt;<BR>&gt; How=20
does that sound?<BR>&gt;<BR>&gt;<BR>&gt; Regards,<BR>&gt; Carol =
Boteler<BR>&gt;=20
GIS Analyst<BR>&gt; Planning and Growth Management<BR>&gt; Hillsborough =
County,=20
Florida<BR>&gt; 813-301-7245<BR>&gt;<BR>&gt; &gt;&gt;&gt; "Nonie Castro" =

&lt;nonie_castro@coxtarget.com&gt; 06/29/05 09:28AM &gt;&gt;&gt;<BR>&gt; =
Oh -=20
yes, I understand that - but thank you the time you took<BR>&gt; to =
explain=20
it.<BR>&gt; What I don't understand is which method to =
choose.<BR>&gt;<BR>&gt;=20
If my territory contains - let's say - 125 carrier routes,<BR>&gt; which =
method=20
will divide those in to 5 classes where each<BR>&gt; class will have an =
EQUAL=20
NUMBER (or close enough) of carrier routes?<BR>&gt;<BR>&gt; I want the =
end user=20
to be able to see at a glance the most<BR>&gt; and least affluent 20% of =
his=20
territory, and 3 equal<BR>&gt; divisions of 20% in the =
middle.<BR>&gt;<BR>&gt;=20
My suspicion is that I need the QUANTILE method, but the help<BR>&gt; =
texts I am=20
reading are confusing.<BR>&gt; Here was a pretty good one, =
though:<BR>&gt;=20
</FONT><A=20
href=3D"http://www.farmresearch.com/gis/tutorials/classification.asp"><FO=
NT=20
face=3D"Trebuchet MS"=20
size=3D2>http://www.farmresearch.com/gis/tutorials/classification.asp</FO=
NT></A><BR><FONT=20
face=3D"Trebuchet MS" size=3D2>&gt;<BR>&gt; &gt; -----Original =
Message-----<BR>&gt;=20
&gt; From: Carol Boteler [</FONT><A=20
href=3D"mailto:BotelerC@hillsboroughcounty.org"><FONT face=3D"Trebuchet =
MS"=20
size=3D2>mailto:BotelerC@hillsboroughcounty.org</FONT></A><BR><FONT=20
face=3D"Trebuchet MS" size=3D2>&gt; &lt;</FONT><A=20
href=3D"mailto:BotelerC@hillsboroughcounty.org"><FONT face=3D"Trebuchet =
MS"=20
size=3D2>mailto:BotelerC@hillsboroughcounty.org</FONT></A><FONT=20
face=3D"Trebuchet MS" size=3D2>&gt; ]<BR>&gt; &gt; Sent: Wednesday, June =
29, 2005=20
9:13 AM<BR>&gt; &gt; To: Nonie Castro<BR>&gt; &gt; Subject: Re: [ESRI-L] =

Classification Method question<BR>&gt; &gt;<BR>&gt; &gt; Nonie,<BR>&gt;=20
&gt;<BR>&gt; &gt; You have the Median HH Income data in a field in a =
geographic=20
data<BR>&gt; &gt; layer? If so, here's how you would show it:<BR>&gt;=20
&gt;<BR>&gt; &gt; Right-click on the layer in the Table of Contents; go =
down=20
to<BR>&gt; &gt; Properties; click on the Symbology tab; click on =
Quantities on=20
the<BR>&gt; &gt; left side of the window; under Fields in the middle, go =

to<BR>&gt; the Value<BR>&gt; &gt; drop-down and select the field name =
that has=20
the income; in the<BR>&gt; &gt; Classes block enter the number "5"; =
click on=20
the<BR>&gt; Classify... button;<BR>&gt; &gt; under Classification, for =
Method=20
drop-down select Equal<BR>&gt; Interval; you<BR>&gt; &gt; can pick a =
color bar=20
to represent your theme.<BR>&gt; &gt;<BR>&gt; &gt; When you click the =
OKs to get=20
back to your map you should see your<BR>&gt; &gt; areas colored in five =
shades.=20
It's a good idea to use high<BR>&gt; intensity<BR>&gt; &gt; color to =
represent=20
large numbers and low color to represent low<BR>&gt; &gt; numbers. Like =
for=20
money, your rich areas will be dark green<BR>&gt; and your<BR>&gt; &gt; =
poor=20
areas will be light green.<BR>&gt; &gt; ...or something like =
that.<BR>&gt;=20
&gt;<BR>&gt; &gt; Let me know if I can offer more help, I'd be glad =
to.<BR>&gt;=20
&gt;<BR>&gt; &gt;<BR>&gt; &gt;<BR>&gt; &gt; Regards,<BR>&gt; &gt; Carol=20
Boteler<BR>&gt; &gt; GIS Analyst<BR>&gt; &gt; Planning and Growth=20
Management<BR>&gt; &gt; Hillsborough County, Florida<BR>&gt; &gt;=20
813-301-7245<BR>&gt; &gt;<BR>&gt; &gt; &gt;&gt;&gt; Nonie Castro=20
&lt;nonie_castro@COXTARGET.COM&gt; 06/27/05 05:43PM &gt;&gt;&gt;<BR>&gt; =

&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I have a territory =
of=20
carrier routes.<BR>&gt; =
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; In=20
the symbology, I want to show five equal<BR>&gt; divisions of =
the<BR>&gt; &gt;=20
total number of carrier routes, but I want to symbolize on<BR>&gt; the=20
Median<BR>&gt; &gt; HH Income.<BR>&gt;=20
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (So the user will =
be able=20
to see at a glance the least<BR>&gt; &gt; affluent 20% and the most =
affluent 20%=20
of his territory, and the<BR>&gt; &gt; middle 3/5 as<BR>&gt; &gt; =
well.)<BR>&gt;=20
&gt;<BR>&gt; &gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; How =
would I do=20
this?<BR>&gt; &gt;<BR>&gt; =
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
(I have a screen shot, but was unable to send it. I<BR>&gt; will =
email<BR>&gt;=20
&gt; it to you if you think it will help.)<BR>&gt; &gt;<BR>&gt;=20
&gt;<BR>&gt;<BR>&gt;<BR>&gt; </FONT></P></BODY></HTML>

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