Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Jan Henrik Øverland 
I have extended the color palette. Should allow for a combination of
colour/value gradation and fixed classes.

[image: Inline image 1]

[image: Inline image 2]
<><>___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Jan Henrik Øverland 
Equal counts is not implemented in the server/png version.


On Thu, Feb 20, 2014 at 6:14 PM, Bob Jolliffe  wrote:

> Hi Bram
>
> Interesting point about the red-yellow-green combo.  These are the traffic
> light colours which are apparently sufficiently ubiquitous that you can say
> red=bad and green=good without even explaining further.  If snooker was as
> well known as traffic lights we could do a whole range from red through to
> pink :-)
>
> But in general, using hues as per Knut's colour brewer link is going to be
> the best bet for most cases of numeric data.  You can even print to black
> and white printers and maintain the message.
>
> Good point about "equal counts".  I actually did do that but somehow it
> rendered different on the dashboard.
>
> Bob
>
> On 20 February 2014 15:54, Bram Piot  wrote:
>
>> Hi Bob,
>>
>> I don't think there's one single rule that will fit all when it comes to
>> choosing your symbols or colours for a thematic map depicting numeric
>> values. There's nothing wrong with say a red/yellow/green colour scheme if
>> you are showing for example reporting rates, where low (red) = bad and high
>> (green) = good. If I were to map out HIV prevalence, then I may go from
>> green (low values) to red (high prevalence). More "neutral" variables such
>> as population density are usually better off with a graduated scheme from
>> light to dark, e.g. pale to dark brown.
>>
>> Maybe the only basic rules are that there should be some logic in the
>> choice of colour ramps, and to keep it simple (don't overload your map,
>> don't use 15 different classes each with a different colour when you only
>> have 20 districts!). I must agree that the current colour scheme for ANC1
>> and ANC2 coverage by chiefdom in the demo site can definitely be improved:
>> too many colours that are not in a logical order. Your diarrhea map looks
>> better, though it would be even better if you changed the classification
>> type to "equal counts" rather than "equal intervals".
>>
>> Agree with what has been requested recently by Knut: option to display
>> polygon data (e.g district) by symbol, not just colour, and include more
>> symbols because currently it's rather limited. Especially for categorical
>> values the legend behaviour could be greatly improved. Bar/Pie charts as
>> symbols on the map would be cool but not a priority as there are more
>> suitable tools for that.
>>
>> bram
>>
>>
>> On 20 February 2014 17:27, Bob Jolliffe  wrote:
>>
>>> Hi
>>>
>>> I am no expert here, but I was talking last week with someone who had
>>> just been on a GIS course.  She made the interesting observation that when
>>> you are displaying numerical data as shaded regions on a map, you should
>>> not mix primary colours in the same gradated scale because what you end up
>>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>>> gradation of values.
>>>
>>> If that is good advice then I think our demo site could be improved as
>>> presently it seems like a good example of bad practice, where we have mixed
>>> red, green and blue with joyful and cheerful abandon :-)
>>>
>>> I had a go to change the Diarrhoea map on the dashboard at
>>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>>> I think it is true that it conveys the data better than the extreme
>>> multi-coloured ones around it.  Even if the distribution of data between
>>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>>> be there for a short while longer)
>>>
>>> If there is a best practice to be had here regarding colour selection I
>>> guess we should promote it, particularly with default offerings so that
>>> people have to be quite deliberate in order to go astray.
>>>
>>> Bob
>>>
>>> ___
>>> Mailing list: https://launchpad.net/~dhis2-users
>>> Post to : dhis2-users@lists.launchpad.net
>>> Unsubscribe : https://launchpad.net/~dhis2-users
>>> More help   : https://help.launchpad.net/ListHelp
>>>
>>>
>>
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Bob Jolliffe 
Hi Bram

Interesting point about the red-yellow-green combo.  These are the traffic
light colours which are apparently sufficiently ubiquitous that you can say
red=bad and green=good without even explaining further.  If snooker was as
well known as traffic lights we could do a whole range from red through to
pink :-)

But in general, using hues as per Knut's colour brewer link is going to be
the best bet for most cases of numeric data.  You can even print to black
and white printers and maintain the message.

Good point about "equal counts".  I actually did do that but somehow it
rendered different on the dashboard.

Bob

On 20 February 2014 15:54, Bram Piot  wrote:

> Hi Bob,
>
> I don't think there's one single rule that will fit all when it comes to
> choosing your symbols or colours for a thematic map depicting numeric
> values. There's nothing wrong with say a red/yellow/green colour scheme if
> you are showing for example reporting rates, where low (red) = bad and high
> (green) = good. If I were to map out HIV prevalence, then I may go from
> green (low values) to red (high prevalence). More "neutral" variables such
> as population density are usually better off with a graduated scheme from
> light to dark, e.g. pale to dark brown.
>
> Maybe the only basic rules are that there should be some logic in the
> choice of colour ramps, and to keep it simple (don't overload your map,
> don't use 15 different classes each with a different colour when you only
> have 20 districts!). I must agree that the current colour scheme for ANC1
> and ANC2 coverage by chiefdom in the demo site can definitely be improved:
> too many colours that are not in a logical order. Your diarrhea map looks
> better, though it would be even better if you changed the classification
> type to "equal counts" rather than "equal intervals".
>
> Agree with what has been requested recently by Knut: option to display
> polygon data (e.g district) by symbol, not just colour, and include more
> symbols because currently it's rather limited. Especially for categorical
> values the legend behaviour could be greatly improved. Bar/Pie charts as
> symbols on the map would be cool but not a priority as there are more
> suitable tools for that.
>
> bram
>
>
> On 20 February 2014 17:27, Bob Jolliffe  wrote:
>
>> Hi
>>
>> I am no expert here, but I was talking last week with someone who had
>> just been on a GIS course.  She made the interesting observation that when
>> you are displaying numerical data as shaded regions on a map, you should
>> not mix primary colours in the same gradated scale because what you end up
>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>> gradation of values.
>>
>> If that is good advice then I think our demo site could be improved as
>> presently it seems like a good example of bad practice, where we have mixed
>> red, green and blue with joyful and cheerful abandon :-)
>>
>> I had a go to change the Diarrhoea map on the dashboard at
>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>> I think it is true that it conveys the data better than the extreme
>> multi-coloured ones around it.  Even if the distribution of data between
>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>> be there for a short while longer)
>>
>> If there is a best practice to be had here regarding colour selection I
>> guess we should promote it, particularly with default offerings so that
>> people have to be quite deliberate in order to go astray.
>>
>> Bob
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Knut Staring 
Exactly: Many children sick = BAD, Many children vaccinated = GOOD


On Thu, Feb 20, 2014 at 5:50 PM, Marta Vila  wrote:

> Yes Nicola, you are right... it is a good combination for that case...
> also for high coverage of vaccination... for instance.
>
> I was thinking more in ... high number of cases of ..., high rate of
> incidence of..., that generally are not very positive
>
>
>
>
>
>
> On 20 February 2014 17:19, Nicola Hobby  wrote:
>
>> Marta, my only thought is that in terms of performance indicators, higher
>> data points would indicate better performance, while lower points indicate
>> poor performance
>>
>>
>> On Thu, Feb 20, 2014 at 11:16 AM, Marta Vila  wrote:
>>
>>> I agree with Bob and since the topic is on the table... I´ve been
>>> wondering for a long time now...
>>>
>>> Why the default legend is painting in green the high values and red the
>>> low ones?
>>> I believe that it may apply in some cases, but generally... it ends up
>>> in showing areas high incidence of cases in green.. and low ones in red...
>>> which is not very intuitive for me...
>>>
>>> Although...it could be solved if we don´t mix primary colors any more
>>>
>>>
>>> On 20 February 2014 16:54, Bram Piot  wrote:
>>>
 Hi Bob,

 I don't think there's one single rule that will fit all when it comes
 to choosing your symbols or colours for a thematic map depicting numeric
 values. There's nothing wrong with say a red/yellow/green colour scheme if
 you are showing for example reporting rates, where low (red) = bad and high
 (green) = good. If I were to map out HIV prevalence, then I may go from
 green (low values) to red (high prevalence). More "neutral" variables such
 as population density are usually better off with a graduated scheme from
 light to dark, e.g. pale to dark brown.

 Maybe the only basic rules are that there should be some logic in the
 choice of colour ramps, and to keep it simple (don't overload your map,
 don't use 15 different classes each with a different colour when you only
 have 20 districts!). I must agree that the current colour scheme for ANC1
 and ANC2 coverage by chiefdom in the demo site can definitely be improved:
 too many colours that are not in a logical order. Your diarrhea map looks
 better, though it would be even better if you changed the classification
 type to "equal counts" rather than "equal intervals".

 Agree with what has been requested recently by Knut: option to display
 polygon data (e.g district) by symbol, not just colour, and include more
 symbols because currently it's rather limited. Especially for categorical
 values the legend behaviour could be greatly improved. Bar/Pie charts as
 symbols on the map would be cool but not a priority as there are more
 suitable tools for that.

 bram


 On 20 February 2014 17:27, Bob Jolliffe  wrote:

> Hi
>
> I am no expert here, but I was talking last week with someone who had
> just been on a GIS course.  She made the interesting observation that when
> you are displaying numerical data as shaded regions on a map, you should
> not mix primary colours in the same gradated scale because what you end up
> with is sort of rubic cube kaleidoscope of colour rather than a clear
> gradation of values.
>
> If that is good advice then I think our demo site could be improved as
> presently it seems like a good example of bad practice, where we have 
> mixed
> red, green and blue with joyful and cheerful abandon :-)
>
> I had a go to change the Diarrhoea map on the dashboard at
> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
> I think it is true that it conveys the data better than the extreme
> multi-coloured ones around it.  Even if the distribution of data between
> bands is not so interesting.  Anyone agree or disagree? (the data will 
> only
> be there for a short while longer)
>
> If there is a best practice to be had here regarding colour selection
> I guess we should promote it, particularly with default offerings so that
> people have to be quite deliberate in order to go astray.
>
> Bob
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>

 ___
 Mailing list: https://launchpad.net/~dhis2-users
 Post to : dhis2-users@lists.launchpad.net
 Unsubscribe : https://launchpad.net/~dhis2-users
 More help   : https://help.launchpad.net/ListHelp


>>>
>>> ___
>>> Mailing list: https://launchpad.net/~dhis2-users
>>> Post to : d

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Marta Vila 
Yes Nicola, you are right... it is a good combination for that case... also
for high coverage of vaccination... for instance.

I was thinking more in ... high number of cases of ..., high rate of
incidence of..., that generally are not very positive






On 20 February 2014 17:19, Nicola Hobby  wrote:

> Marta, my only thought is that in terms of performance indicators, higher
> data points would indicate better performance, while lower points indicate
> poor performance
>
>
> On Thu, Feb 20, 2014 at 11:16 AM, Marta Vila  wrote:
>
>> I agree with Bob and since the topic is on the table... I´ve been
>> wondering for a long time now...
>>
>> Why the default legend is painting in green the high values and red the
>> low ones?
>> I believe that it may apply in some cases, but generally... it ends up in
>> showing areas high incidence of cases in green.. and low ones in red...
>> which is not very intuitive for me...
>>
>> Although...it could be solved if we don´t mix primary colors any more
>>
>>
>> On 20 February 2014 16:54, Bram Piot  wrote:
>>
>>> Hi Bob,
>>>
>>> I don't think there's one single rule that will fit all when it comes to
>>> choosing your symbols or colours for a thematic map depicting numeric
>>> values. There's nothing wrong with say a red/yellow/green colour scheme if
>>> you are showing for example reporting rates, where low (red) = bad and high
>>> (green) = good. If I were to map out HIV prevalence, then I may go from
>>> green (low values) to red (high prevalence). More "neutral" variables such
>>> as population density are usually better off with a graduated scheme from
>>> light to dark, e.g. pale to dark brown.
>>>
>>> Maybe the only basic rules are that there should be some logic in the
>>> choice of colour ramps, and to keep it simple (don't overload your map,
>>> don't use 15 different classes each with a different colour when you only
>>> have 20 districts!). I must agree that the current colour scheme for ANC1
>>> and ANC2 coverage by chiefdom in the demo site can definitely be improved:
>>> too many colours that are not in a logical order. Your diarrhea map looks
>>> better, though it would be even better if you changed the classification
>>> type to "equal counts" rather than "equal intervals".
>>>
>>> Agree with what has been requested recently by Knut: option to display
>>> polygon data (e.g district) by symbol, not just colour, and include more
>>> symbols because currently it's rather limited. Especially for categorical
>>> values the legend behaviour could be greatly improved. Bar/Pie charts as
>>> symbols on the map would be cool but not a priority as there are more
>>> suitable tools for that.
>>>
>>> bram
>>>
>>>
>>> On 20 February 2014 17:27, Bob Jolliffe  wrote:
>>>
 Hi

 I am no expert here, but I was talking last week with someone who had
 just been on a GIS course.  She made the interesting observation that when
 you are displaying numerical data as shaded regions on a map, you should
 not mix primary colours in the same gradated scale because what you end up
 with is sort of rubic cube kaleidoscope of colour rather than a clear
 gradation of values.

 If that is good advice then I think our demo site could be improved as
 presently it seems like a good example of bad practice, where we have mixed
 red, green and blue with joyful and cheerful abandon :-)

 I had a go to change the Diarrhoea map on the dashboard at
 http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
 I think it is true that it conveys the data better than the extreme
 multi-coloured ones around it.  Even if the distribution of data between
 bands is not so interesting.  Anyone agree or disagree? (the data will only
 be there for a short while longer)

 If there is a best practice to be had here regarding colour selection I
 guess we should promote it, particularly with default offerings so that
 people have to be quite deliberate in order to go astray.

 Bob

 ___
 Mailing list: https://launchpad.net/~dhis2-users
 Post to : dhis2-users@lists.launchpad.net
 Unsubscribe : https://launchpad.net/~dhis2-users
 More help   : https://help.launchpad.net/ListHelp


>>>
>>> ___
>>> Mailing list: https://launchpad.net/~dhis2-users
>>> Post to : dhis2-users@lists.launchpad.net
>>> Unsubscribe : https://launchpad.net/~dhis2-users
>>> More help   : https://help.launchpad.net/ListHelp
>>>
>>>
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
>
> --
> Nicola Hobby
> MIS Program Manager
>
> Office: +1 (202) 469-6685
> Skype: nicolahobby
>
> *Connect

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Nicola Hobby 
Marta, my only thought is that in terms of performance indicators, higher
data points would indicate better performance, while lower points indicate
poor performance


On Thu, Feb 20, 2014 at 11:16 AM, Marta Vila  wrote:

> I agree with Bob and since the topic is on the table... I´ve been
> wondering for a long time now...
>
> Why the default legend is painting in green the high values and red the
> low ones?
> I believe that it may apply in some cases, but generally... it ends up in
> showing areas high incidence of cases in green.. and low ones in red...
> which is not very intuitive for me...
>
> Although...it could be solved if we don´t mix primary colors any more
>
>
> On 20 February 2014 16:54, Bram Piot  wrote:
>
>> Hi Bob,
>>
>> I don't think there's one single rule that will fit all when it comes to
>> choosing your symbols or colours for a thematic map depicting numeric
>> values. There's nothing wrong with say a red/yellow/green colour scheme if
>> you are showing for example reporting rates, where low (red) = bad and high
>> (green) = good. If I were to map out HIV prevalence, then I may go from
>> green (low values) to red (high prevalence). More "neutral" variables such
>> as population density are usually better off with a graduated scheme from
>> light to dark, e.g. pale to dark brown.
>>
>> Maybe the only basic rules are that there should be some logic in the
>> choice of colour ramps, and to keep it simple (don't overload your map,
>> don't use 15 different classes each with a different colour when you only
>> have 20 districts!). I must agree that the current colour scheme for ANC1
>> and ANC2 coverage by chiefdom in the demo site can definitely be improved:
>> too many colours that are not in a logical order. Your diarrhea map looks
>> better, though it would be even better if you changed the classification
>> type to "equal counts" rather than "equal intervals".
>>
>> Agree with what has been requested recently by Knut: option to display
>> polygon data (e.g district) by symbol, not just colour, and include more
>> symbols because currently it's rather limited. Especially for categorical
>> values the legend behaviour could be greatly improved. Bar/Pie charts as
>> symbols on the map would be cool but not a priority as there are more
>> suitable tools for that.
>>
>> bram
>>
>>
>> On 20 February 2014 17:27, Bob Jolliffe  wrote:
>>
>>> Hi
>>>
>>> I am no expert here, but I was talking last week with someone who had
>>> just been on a GIS course.  She made the interesting observation that when
>>> you are displaying numerical data as shaded regions on a map, you should
>>> not mix primary colours in the same gradated scale because what you end up
>>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>>> gradation of values.
>>>
>>> If that is good advice then I think our demo site could be improved as
>>> presently it seems like a good example of bad practice, where we have mixed
>>> red, green and blue with joyful and cheerful abandon :-)
>>>
>>> I had a go to change the Diarrhoea map on the dashboard at
>>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>>> I think it is true that it conveys the data better than the extreme
>>> multi-coloured ones around it.  Even if the distribution of data between
>>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>>> be there for a short while longer)
>>>
>>> If there is a best practice to be had here regarding colour selection I
>>> guess we should promote it, particularly with default offerings so that
>>> people have to be quite deliberate in order to go astray.
>>>
>>> Bob
>>>
>>> ___
>>> Mailing list: https://launchpad.net/~dhis2-users
>>> Post to : dhis2-users@lists.launchpad.net
>>> Unsubscribe : https://launchpad.net/~dhis2-users
>>> More help   : https://help.launchpad.net/ListHelp
>>>
>>>
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>


-- 
Nicola Hobby
MIS Program Manager

Office: +1 (202) 469-6685
Skype: nicolahobby

*Connect with PSI*
Website   |  Blog   |
Twitter   |
Facebook  |
 YouTube 



  



Donate to P

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Marta Vila 
I agree with Bob and since the topic is on the table... I´ve been wondering
for a long time now...

Why the default legend is painting in green the high values and red the low
ones?
I believe that it may apply in some cases, but generally... it ends up in
showing areas high incidence of cases in green.. and low ones in red...
which is not very intuitive for me...

Although...it could be solved if we don´t mix primary colors any more


On 20 February 2014 16:54, Bram Piot  wrote:

> Hi Bob,
>
> I don't think there's one single rule that will fit all when it comes to
> choosing your symbols or colours for a thematic map depicting numeric
> values. There's nothing wrong with say a red/yellow/green colour scheme if
> you are showing for example reporting rates, where low (red) = bad and high
> (green) = good. If I were to map out HIV prevalence, then I may go from
> green (low values) to red (high prevalence). More "neutral" variables such
> as population density are usually better off with a graduated scheme from
> light to dark, e.g. pale to dark brown.
>
> Maybe the only basic rules are that there should be some logic in the
> choice of colour ramps, and to keep it simple (don't overload your map,
> don't use 15 different classes each with a different colour when you only
> have 20 districts!). I must agree that the current colour scheme for ANC1
> and ANC2 coverage by chiefdom in the demo site can definitely be improved:
> too many colours that are not in a logical order. Your diarrhea map looks
> better, though it would be even better if you changed the classification
> type to "equal counts" rather than "equal intervals".
>
> Agree with what has been requested recently by Knut: option to display
> polygon data (e.g district) by symbol, not just colour, and include more
> symbols because currently it's rather limited. Especially for categorical
> values the legend behaviour could be greatly improved. Bar/Pie charts as
> symbols on the map would be cool but not a priority as there are more
> suitable tools for that.
>
> bram
>
>
> On 20 February 2014 17:27, Bob Jolliffe  wrote:
>
>> Hi
>>
>> I am no expert here, but I was talking last week with someone who had
>> just been on a GIS course.  She made the interesting observation that when
>> you are displaying numerical data as shaded regions on a map, you should
>> not mix primary colours in the same gradated scale because what you end up
>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>> gradation of values.
>>
>> If that is good advice then I think our demo site could be improved as
>> presently it seems like a good example of bad practice, where we have mixed
>> red, green and blue with joyful and cheerful abandon :-)
>>
>> I had a go to change the Diarrhoea map on the dashboard at
>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>> I think it is true that it conveys the data better than the extreme
>> multi-coloured ones around it.  Even if the distribution of data between
>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>> be there for a short while longer)
>>
>> If there is a best practice to be had here regarding colour selection I
>> guess we should promote it, particularly with default offerings so that
>> people have to be quite deliberate in order to go astray.
>>
>> Bob
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Knut Staring 
Available as JSON:
http://colorbrewer2.org/export/colorbrewer.json


On Thu, Feb 20, 2014 at 4:46 PM, Knut Staring  wrote:

> http://colorbrewer2.org/
>
>
> On Thu, Feb 20, 2014 at 4:42 PM, Jan Henrik Øverland <
> janhenrik.overl...@gmail.com> wrote:
>
>> Others will have to comment on this, but what we should do anyway is to
>> add more colours to the palette to allow for a combination of the two -
>> fixed class breaks (predefined legend set) and that nice colour/value
>> gradation Bob mentioned.
>>
>>
>> On Thu, Feb 20, 2014 at 4:27 PM, Bob Jolliffe wrote:
>>
>>> Hi
>>>
>>> I am no expert here, but I was talking last week with someone who had
>>> just been on a GIS course.  She made the interesting observation that when
>>> you are displaying numerical data as shaded regions on a map, you should
>>> not mix primary colours in the same gradated scale because what you end up
>>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>>> gradation of values.
>>>
>>> If that is good advice then I think our demo site could be improved as
>>> presently it seems like a good example of bad practice, where we have mixed
>>> red, green and blue with joyful and cheerful abandon :-)
>>>
>>> I had a go to change the Diarrhoea map on the dashboard at
>>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>>> I think it is true that it conveys the data better than the extreme
>>> multi-coloured ones around it.  Even if the distribution of data between
>>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>>> be there for a short while longer)
>>>
>>> If there is a best practice to be had here regarding colour selection I
>>> guess we should promote it, particularly with default offerings so that
>>> people have to be quite deliberate in order to go astray.
>>>
>>> Bob
>>>
>>> ___
>>> Mailing list: https://launchpad.net/~dhis2-users
>>> Post to : dhis2-users@lists.launchpad.net
>>> Unsubscribe : https://launchpad.net/~dhis2-users
>>> More help   : https://help.launchpad.net/ListHelp
>>>
>>>
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
>
> --
> Knut Staring
> Dept. of Informatics, University of Oslo
> +4791880522
> http://dhis2.org
>



-- 
Knut Staring
Dept. of Informatics, University of Oslo
+4791880522
http://dhis2.org
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Bram Piot 
Hi Bob,

I don't think there's one single rule that will fit all when it comes to
choosing your symbols or colours for a thematic map depicting numeric
values. There's nothing wrong with say a red/yellow/green colour scheme if
you are showing for example reporting rates, where low (red) = bad and high
(green) = good. If I were to map out HIV prevalence, then I may go from
green (low values) to red (high prevalence). More "neutral" variables such
as population density are usually better off with a graduated scheme from
light to dark, e.g. pale to dark brown.

Maybe the only basic rules are that there should be some logic in the
choice of colour ramps, and to keep it simple (don't overload your map,
don't use 15 different classes each with a different colour when you only
have 20 districts!). I must agree that the current colour scheme for ANC1
and ANC2 coverage by chiefdom in the demo site can definitely be improved:
too many colours that are not in a logical order. Your diarrhea map looks
better, though it would be even better if you changed the classification
type to "equal counts" rather than "equal intervals".

Agree with what has been requested recently by Knut: option to display
polygon data (e.g district) by symbol, not just colour, and include more
symbols because currently it's rather limited. Especially for categorical
values the legend behaviour could be greatly improved. Bar/Pie charts as
symbols on the map would be cool but not a priority as there are more
suitable tools for that.

bram


On 20 February 2014 17:27, Bob Jolliffe  wrote:

> Hi
>
> I am no expert here, but I was talking last week with someone who had just
> been on a GIS course.  She made the interesting observation that when you
> are displaying numerical data as shaded regions on a map, you should not
> mix primary colours in the same gradated scale because what you end up with
> is sort of rubic cube kaleidoscope of colour rather than a clear gradation
> of values.
>
> If that is good advice then I think our demo site could be improved as
> presently it seems like a good example of bad practice, where we have mixed
> red, green and blue with joyful and cheerful abandon :-)
>
> I had a go to change the Diarrhoea map on the dashboard at
> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
> I think it is true that it conveys the data better than the extreme
> multi-coloured ones around it.  Even if the distribution of data between
> bands is not so interesting.  Anyone agree or disagree? (the data will only
> be there for a short while longer)
>
> If there is a best practice to be had here regarding colour selection I
> guess we should promote it, particularly with default offerings so that
> people have to be quite deliberate in order to go astray.
>
> Bob
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Knut Staring 
http://colorbrewer2.org/


On Thu, Feb 20, 2014 at 4:42 PM, Jan Henrik Øverland <
janhenrik.overl...@gmail.com> wrote:

> Others will have to comment on this, but what we should do anyway is to
> add more colours to the palette to allow for a combination of the two -
> fixed class breaks (predefined legend set) and that nice colour/value
> gradation Bob mentioned.
>
>
> On Thu, Feb 20, 2014 at 4:27 PM, Bob Jolliffe wrote:
>
>> Hi
>>
>> I am no expert here, but I was talking last week with someone who had
>> just been on a GIS course.  She made the interesting observation that when
>> you are displaying numerical data as shaded regions on a map, you should
>> not mix primary colours in the same gradated scale because what you end up
>> with is sort of rubic cube kaleidoscope of colour rather than a clear
>> gradation of values.
>>
>> If that is good advice then I think our demo site could be improved as
>> presently it seems like a good example of bad practice, where we have mixed
>> red, green and blue with joyful and cheerful abandon :-)
>>
>> I had a go to change the Diarrhoea map on the dashboard at
>> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
>> I think it is true that it conveys the data better than the extreme
>> multi-coloured ones around it.  Even if the distribution of data between
>> bands is not so interesting.  Anyone agree or disagree? (the data will only
>> be there for a short while longer)
>>
>> If there is a best practice to be had here regarding colour selection I
>> guess we should promote it, particularly with default offerings so that
>> people have to be quite deliberate in order to go astray.
>>
>> Bob
>>
>> ___
>> Mailing list: https://launchpad.net/~dhis2-users
>> Post to : dhis2-users@lists.launchpad.net
>> Unsubscribe : https://launchpad.net/~dhis2-users
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>


-- 
Knut Staring
Dept. of Informatics, University of Oslo
+4791880522
http://dhis2.org
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp

Re: [Dhis2-users] GIS best practice choice of colours

2014-02-20 Thread Jan Henrik Øverland 
Others will have to comment on this, but what we should do anyway is to add
more colours to the palette to allow for a combination of the two - fixed
class breaks (predefined legend set) and that nice colour/value gradation
Bob mentioned.


On Thu, Feb 20, 2014 at 4:27 PM, Bob Jolliffe  wrote:

> Hi
>
> I am no expert here, but I was talking last week with someone who had just
> been on a GIS course.  She made the interesting observation that when you
> are displaying numerical data as shaded regions on a map, you should not
> mix primary colours in the same gradated scale because what you end up with
> is sort of rubic cube kaleidoscope of colour rather than a clear gradation
> of values.
>
> If that is good advice then I think our demo site could be improved as
> presently it seems like a good example of bad practice, where we have mixed
> red, green and blue with joyful and cheerful abandon :-)
>
> I had a go to change the Diarrhoea map on the dashboard at
> http://apps.dhis2.org/dev/dhis-web-dashboard-integration/index.action and
> I think it is true that it conveys the data better than the extreme
> multi-coloured ones around it.  Even if the distribution of data between
> bands is not so interesting.  Anyone agree or disagree? (the data will only
> be there for a short while longer)
>
> If there is a best practice to be had here regarding colour selection I
> guess we should promote it, particularly with default offerings so that
> people have to be quite deliberate in order to go astray.
>
> Bob
>
> ___
> Mailing list: https://launchpad.net/~dhis2-users
> Post to : dhis2-users@lists.launchpad.net
> Unsubscribe : https://launchpad.net/~dhis2-users
> More help   : https://help.launchpad.net/ListHelp
>
>
___
Mailing list: https://launchpad.net/~dhis2-users
Post to : dhis2-users@lists.launchpad.net
Unsubscribe : https://launchpad.net/~dhis2-users
More help   : https://help.launchpad.net/ListHelp