As part of the ongoing upgrade and cleanup done by the Nyall, we should
take the opportunity to get rid of one of the overlapping "Zonal
Statistics" and "Zonal Statistics (QGIS)" algorithms. The latter relies on
QGIS' QgsZonalStatistics.
Yesterday, I've resurrected the "Zonal Statistics (QGIS)" al
Il 28/06/2017 04:19, Mathieu Pellerin ha scritto:
> As part of the ongoing upgrade and cleanup done by the Nyall, we should
> take the opportunity to get rid of one of the overlapping "Zonal
> Statistics" and "Zonal Statistics (QGIS)" algorithms. The latter relies
> on QGIS' QgsZonalStatistics.
>
On 28 June 2017 at 12:19, Mathieu Pellerin wrote:
> As part of the ongoing upgrade and cleanup done by the Nyall, we should take
> the opportunity to get rid of one of the overlapping "Zonal Statistics" and
> "Zonal Statistics (QGIS)" algorithms. The latter relies on QGIS'
> QgsZonalStatistics.
>
Here's a table showing the overlap (and unique features) of both algs:
*QgsZonalStatistics alg* *Alternate alg*
Count x x
Sum x x
Mean x x
Median x x
StDev x x
Min x x
Max x x
Range x x
Minority x
Majority x
Variety / Unique x x
Variance (i.e. numpy.var)
x
Mode (I.e.scipy.stats.mode)
x
Two stati
On 28 June 2017 at 15:55, Mathieu Pellerin wrote:
>
> Two statistical outputs (variance and mode) aren't available in
> QgsZonalStatistics-based alg, while two outputs (minority and majority) are
> missing from the alternate alg.
Thanks!
Mode = majority here, so both algs offer this value.
V
Hi,
alternate alg was introduced in the time, when QgsZonalStatistics offered
only some basic statistical information, e.g. min/max, count and couple of
other values and did not allow to select individual stats.
Now, when QgsZonalStatistics is much more powerful personally I (as author
if this al
Il 28 giugno 2017 08:07:12 CEST, Nyall Dawson ha
scritto:
>On 28 June 2017 at 15:55, Mathieu Pellerin
>wrote:
>>
>
>> Two statistical outputs (variance and mode) aren't available in
>QgsZonalStatistics-based alg, while two outputs (minority and majority)
>are missing from the alternate alg.
>
>T
On 28 June 2017 at 16:23, Paolo Cavallini wrote:
>
>
> Fine. Could we then rename from majority to mode? More understandable IMHO.
We could just rename the option as "Majority (mode)" - does that work
for you? (or "Mode (majority)").
> Would it be possible to also add variance?
Should be trivi
Il 28/06/2017 09:48, Nyall Dawson ha scritto:
> We could just rename the option as "Majority (mode)" - does that work
> for you? (or "Mode (majority)").
fine for me; I just think mode is much more used in stats.
>> Would it be possible to also add variance?
>
> Should be trivial to do - it's ju
This PR (https://github.com/qgis/QGIS/pull/4792) adds variance to
QgsZonalStatistics, and remove the duplicate processing zonal statistics
algorithm on the basis of a general consensus in this mail tread and more
importantly its author, Alexander Bruy, agreeing.
Thanks for the time spent discussin
10 matches
Mail list logo
