[Qgis-user] Automating creation of county distribution maps

[Bernd Vogelgesang]

As long as the informations are this vague and we do not know what his
data-sets looks alike, there is no use in proposing a workflow.

The spreadsheet approach sounds horrible to me ;)

Bernd


Am 10.03.22 um 18:49 schrieb Nicolas Cadieux via Qgis-user:
> Hi,
>
> I’am not quite sure what processes you want automated but if the step
> previously described suit your needs, then all the steps could be
> incorporated into a model and this model, like any algorithm found in
> « processing » can be batched.
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
>> Le 10 mars 2022 à 08:07, Mike Breiding - Morgantown WV via Qgis-user
>> <qgis-user at lists.osgeo.org> a écrit :
>>
>> 
>> I appreciate you taking the time for writing such a detailed set of
>> instructions.
>> However, it is quicker for me to do it manually.
>>
>> If the process could be automated then of course it would be a
>> different matter.
>> I am working only with the ferns - less than a hundred records.
>> The flower plants are over 2500.
>>
>> Thanks,
>> WV-Mike
>> =============
>> On 3/9/2022 3:46 PM, David Strip wrote:
>>> As first step towards building a model as Nicolas has suggested:
>>> I assume you have a layer with the county boundaries. Export this
>>> layer as a CSV file, keeping only the name of each county in the
>>> export step, and don't export the geometry.
>>> Now open this file in your spreadsheet app of choice.
>>> Add a new column for each plant species.
>>> Put a one in that column for each county where the species is present.
>>> Save the file (still as CSV).
>>>
>>> Open the county layer and the new CSV files in Ggis.
>>> Open the properties window for the county layer and click on the
>>> Joins tab.
>>> Click on the "+" to add a new join. Join to the CSV layer, and
>>> select the county names field as the join field for each.
>>>
>>> Now your county layer has the plant species column.
>>> To display a single species, open the properties window for the
>>> county layer, select symbology. Set the symbology as rule based. To
>>> color just those counties with species 1, your rule would say
>>> something like Species1 = 1, where Species1 is the field name you
>>> used. Pick a color/transparency of your choice, then set the "all
>>> others" rules to be the background color you want.
>>>
>>> That does it for one species. You can then export to tiff or
>>> whatever. Getting it to cycle through all the different species is
>>> for someone else to explain.
>>
>> -- Mike Breiding www.EpicRoadTrips.us
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