Questions tagged [jenks]
Questions relating to the Jenks optimization method.
9
questions
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Defining not-custom graduated style to polygon layer in PyQGIS
I'm writing some scripts on the PyQGIS 3 console to build a plug-in and I would like to create a color-graduated style for my vector layer. I read Applying graduated renderer to polygon using PyQGIS, ...
2
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1
answer
323
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Jenks Classification with multiple colors PyQGIS 3
I want to make a Jenks classification in Python for QGIS 3.16 with 5 classes and 5 colors for a shapefile layer.
I've tried this code :
renderer = QgsGraduatedSymbolRenderer()
renderer....
1
vote
1
answer
345
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Applying Jenks classification on subset of features using PyQGIS [closed]
I have a layer of watersheds, and a layer of diagnostic units, that are contained in each watersheds.
I have indicator values for each diagnostic unit. Indicator values have been normalised according ...
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Natural Breaks Results Difference in Different GIS Analyst Tools
I calculated natural break clustering in each GIS software and Python Jenkspy library.
The data is population of each city in Europe and this is the result below.
Jenkspy library and QGIS shows ...
- 1,050
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0
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764
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Raster reclassification in QGIS or other open source software with automatically calculated breaks
I've been searching for a way to automatically calculate breaks to reclassify a raster using QGIS or another open source software, in a similar way it can be done in ArcGIS (Slice tool). I've searched ...
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63
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Choosing color classes for comparing differently distributed spatial data
For comparison, I want to draw two maps alongside each other. Both maps should use the same color classes/scale. The problem is that the data for the maps is very different: The data for the first map ...
- 273
4
votes
1
answer
407
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How to determine the appropriate classification type in a graduated style choropleth map?
I have to provide choropleth maps for for Energy savings, Emission savings, Cost Savings related to different administrative boundaries such as provinces and states, but I don't know which ...
- 153
2
votes
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answer
335
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Pseudo natural breaks classification
Wondering if there is a code or tool that will allow me to format the ranges and labels for classes for Natural Breaks (Jenks) classification in ArcGIS?
I understand that if I alter the ranges it ...
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What is the theory behind graduated symbols in QGIS?
QGIS offers 5 methods of classifying vector map data (quantiles, equal interval, etc). What is the theoretical base of these methods? If there are certain methods suitable for certain types of data or ...