[Qgis-user] Using qgis as realtime decision support tool
Jeroen Hovens
mail at groenebij.nl
Mon Jun 18 08:10:05 PDT 2018
That would work if updating the xlsx file automatically leads to an updated map. Does it, or do I have to renew the join every time the xlslx is updated?
I would like the decision makers to see directly what happens to the geographical spread if they refuse proposal 10 to 21 (for instance based on quality of the proposal). Because geographical spread is one of the criteria and this is best visualized with a map (instead of a list of municipality names), they can argue and reconsider choices. That's my need for 'real-time'.
Combined with the wish to make changes in just one document (xlsx being the easiest) in stead of two (both xlsx and qgis), I am looking for solution.
I have to look into the Statistics panel. Will that provide cumulations of a certain column based on a selection of fields (all the selected proposals)? And what is used to create that selection? Does it refresh automatically?
-----Oorspronkelijk bericht-----
Van: Qgis-user <qgis-user-bounces at lists.osgeo.org> Namens Raymond Nijssen
Verzonden: maandag 18 juni 2018 13:35
Aan: qgis-user at lists.osgeo.org
Onderwerp: Re: [Qgis-user] Using qgis as realtime decision support tool
Hi Jeroen,
If I understand you correctly, you just want to color entire municipalities based on information in one or few columns? And the challenge is cooperating with others, who don't know QGIS?
You could use a shared drive, like dropbox, to store 3 files:
1 table (xlsx or csv)
1 geo layer with municipalities (gpkg or shp)
1 qgis project, with the table joined to the layer, and with the desired style
Others can update the table, and you (and others) can open the project and see the updated map in qgis.
Would that work?
On 18-06-18 12:40, Alexandre Neto wrote:
> I agree that one layer would be preferable. Using the categorized
> renderer would make it easy to select and deselect proposals. You can
> create the classes with a mix of the name of the munucipality and the
> bugdet, that way that is visible directly on the legend, making it
> easier to select.
>
> Then you can use the Statistics panel to show the stats over a column,
> for example the budget sum.
>
> Jeroen Hovens <mail at groenebij.nl <mailto:mail at groenebij.nl>> escreveu
> no dia segunda, 18/06/2018 às 11:27:
>
> I have not organized the data yet, that will depend on the pro’s and
> con’s of idea’s how to use it.____
>
> __ __
>
> For now, I am thinking along the following line:____
>
> All municipalities as fields with attributes being whether or not
> they have a proposal and specific information about the proposal
> such as budget needed, type of project, etc.____
>
> That would mean 1 layer with all the proposals. That way it seems
> easier to show the entire map (all municipalities white, just
> borders, and all municipalities with proposal coloured), so to
> easily see the spread.____
>
> __ __
>
> __ __
>
> *Van:* Alexandre Neto <senhor.neto at gmail.com
> <mailto:senhor.neto at gmail.com>>
> *Verzonden:* maandag 18 juni 2018 12:03
> *Aan:* Jeroen Hovens <mail at groenebij.nl <mailto:mail at groenebij.nl>>
> *CC:* qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org>
> *Onderwerp:* Re: [Qgis-user] Using qgis as realtime decision support
> tool____
>
> __ __
>
> Hi,____
>
> It's not clear how your data is organized, making it dificult to
> help in such a specific request. All the porposals are in the same
> layer, or in diferent layers?____
>
> __ __
>
> Still, if you put all the proposal layers in mutually exclusive
> group, it will be easy to swap between proposals.____
>
> __ __
>
> If they are all in the same layer, you can categorize and in the
> legend you can select which proposal to show.____
>
> __ __
>
>
> https://docs.qgis.org/testing/en/docs/user_manual/introduction/general
> _tools.html?highlight=mutually#interact-with-groups-and-layers____
>
> __ __
>
> You can also create an atlas with the necessary visualizations for
> each proposal and the calculus of the values you wish to show. But
> again, it all depends on how you have you data organized.____
>
> __ __
>
> __ __
>
> Jeroen Hovens <mail at groenebij.nl <mailto:mail at groenebij.nl>>
> escreveu no dia segunda, 18/06/2018 às 10:19:____
>
> Hello,____
>
> ____
>
> I am thinking about using qgis as a real-time decision support
> tool and I am looking for some good ideas to ease the
> process.____
>
> ____
>
> The case is the following:____
>
> I have proposals from 60 municipalities (out of a possible few
> hundred), each has 1 proposal. There is only room for 20
> proposals to be accepted. One of the criteria will be the
> geographical spread of the proposals: it is preferred to have 20
> proposals sort of evenly spread over the entire country, instead
> of having the majority of them coming from one region.____
>
> ____
>
> My idea is to show these proposals on a map by colouring the
> municipalities. As a decision support tool I need the ability to
> adjust the selection in real-time (during the discussion). The
> easy way is to just edit the attribute table or to select or
> deselect specific municipalities. This however requires myself
> to be present and make changes in qgis as the discussion goes
> (given that nobody else in the decision group knows how to work
> with qgis).____
>
> An alternative is to produce a webmap and have each municipality
> with a proposal have it’s own specific attribute value (but all
> using the same colour in categorized style), so they all show up
> in the map-legend, and any group member can easily select or
> deselect a specific municipality from the legend.____
>
> ____
>
> Do you have other ideas how to use a map as a real-time decision
> support tool?____
>
> ____
>
> Quality of the proposal is the main criterium, but in addition
> to the geographical spread there are others as well, such as
> variety in projects and the cumulative budget for the selected
> proposals (the cumulative budget is capped). Since I am not well
> known with database and calculation options in qgis and how to
> automatically show the results, I am building an easy to use
> excel file that will show all this information using precoded
> calculations, much like a dashboard. Simply selecting and
> deselecting proposals in an excel interface show you the changes
> in variety of projects and cumulative budget. This is much
> easier for the decision team to do themselves, since MS Excel is
> a well known environment. ____
>
> Ideally I get the two connected somehow, so selecting and
> deselecting proposals will alter the results in both the map as
> in the excel dashboard. However, altering data in excel doesn’t
> automatically change the results in a qgis map, because they are
> not connected in real-time.____
>
> ____
>
> Do you have any ideas how to make a real-time connection between
> MS Excel and a qgis map? Or information on how to use qgis
> internal capabilities to calculate certain values based on the
> selection of proposals? However, the last option will probably
> still need myself to be present to somehow select or deselect
> the proposals in qgis.____
>
> ____
>
> Greetings,____
>
> Jeroen____
>
> ____
>
> ____
>
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> -- ____
>
> Alexandre Neto____
>
> ---------------------____
>
> @AlexNetoGeo____
>
> http://sigsemgrilhetas.wordpress.com____
>
> http://gisunchained.wordpress.com____
>
> --
> Alexandre Neto
> ---------------------
> @AlexNetoGeo
> http://sigsemgrilhetas.wordpress.com
> http://gisunchained.wordpress.com
>
>
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