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 <nho...@psi.org> 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 <martav...@gmail.com> 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 <bram.p...@gmail.com> 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 <bobjolli...@gmail.com> 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 <http://www.psi.org/> | Blog <http://blog.psiimpact.com/> | > Twitter <https://twitter.com/PSIimpact> | > Facebook<https://www.facebook.com/PSIHealthyLives> | > YouTube <http://www.youtube.com/user/healthybehaviors> > > <http://www.psi.org/> <http://blog.psiimpact.com/> > <https://twitter.com/PSIimpact> > <https://www.facebook.com/PSIHealthyLives> > <http://www.youtube.com/user/healthybehaviors> > > > Donate to PSI > www.psi.org. 94.5 cents of every dollar raised directly supports PSI > programs. >
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