RasterClassifyColorizer

Zusammenfassung

Represents a raster classify colorizer.

Auswertung

The properties behave in a similar manner to the options exposed in the application. For example, changing the number of classes will automatically adjust the break values and their labels. If you change the upperBound property of a RasterClassBreak, the classificationMethod automatically changes to ManualInterval. You would also need to manually update the labels property accordingly.

Eigenschaften

Eigenschaft	Erklärung	Datentyp
breakCount (Lesen und schreiben)	An integer that represents the number of classes to be used with the current classification method.	Integer
classBreaks (Lesen und schreiben)	A list of RasterClassBreak objects that provides access to individual properties such as label and color.	List
classificationField (Lesen und schreiben)	A string that represents a valid field name used for the layer's classification method.	String
classificationMethod (Lesen und schreiben)	A string that represents a valid classification method. The valid values are as follows: DefinedInterval —Defined Interval EqualInterval —Equal Interval GeometricInterval —Geometric Interval ManualInterval —Manual Interval NaturalBreaks —Natural Breaks (Jenks) Quantile —Quantile StandardDeviation —Standard Deviation	String
colorRamp (Lesen und schreiben)	Provides access to the ColorRamp object.	ColorRamp
noDataColor (Lesen und schreiben)	A Boolean that controls the display of missing values. If True missing values are displayed.	Dictionary
type (Nur lesen)	Returns a string that represents the renderer type.	String

Codebeispiel

RasterClassifyColorizer example 1

The following script first tests if the layer's symbology supports a colorizer property and then confirms if the renderer is a RasterClassifyColorizer. Next. it changes the classificationField and breakCount. Finally, it changes ColorRamp to a color ramp named Cyan to Purple.

import arcpy
import os
import sys

relpath = os.path.dirname(sys.argv[0])

p = arcpy.mp.ArcGISProject(relpath + r'\\RasterClassify.aprx')
m = p.listMaps('Map')[0]
l = m.listLayers('Raster1')[0]
sym = l.symbology

if hasattr(sym, 'colorizer'):
    if sym.colorizer.type == 'RasterClassifyColorizer':
        sym.colorizer.classificationField = 'Value'
        sym.colorizer.breakCount = 7
        sym.colorizer.colorRamp = p.listColorRamps('Cyan to Purple')[0]
        l.symbology = sym

p.saveACopy(relpath + r'\\SavedOutput.aprx')

RasterClassifyColorizer example 2

The following script modifies the symbology of a raster layer that uses a raster classified colorizer. It sets classificationField, breakCount, and noDataColor. Next, it iterates through each raster class break and modifies the upperBound, label, description, and color properties. The labels for each break are formatted to include the less than or equal symbol and thousands separators. The HSV colors for each raster class break are incremented by even intervals.

# -*- coding: utf-8 -*-
import arcpy
import os
import sys
import locale
relpath = os.path.dirname(sys.argv[0])

p = arcpy.mp.ArcGISProject(relpath + r'\\RasterClassify.aprx')
m = p.listMaps('Map')[0]
l = m.listLayers('Raster1')[0]

sym = l.symbology
sym.colorizer.classificationField = "Value"
sym.colorizer.breakCount = 5
sym.colorizer.noDataColor = {'RGB': [255, 255, 255, 100]}

breakVal = 50
cv = 0
for brk in sym.colorizer.classBreaks:
    brk.upperBound = breakVal
    brk.label = "\u2264" + str(locale.format("%d", breakVal, grouping=True))
    brk.description = "Description " + str(cv)
    brk.color = {'HSV' : [cv, cv, cv, 100]}

    breakVal +=50
    cv += 40
    
l.symbology = sym

p.saveACopy(relpath + r'\\SavedOutput.aprx')