Symbolize by Numeric Field (Business Analyst)

Summary

Thematically maps a feature class based on a numeric field

Learn more about how Symbolize by Numeric Field works

Usage

• Displaying points as different colors based on the values of a numeric attribute is an example of a graduated colormap. This kind of map is most useful for showing data that is ranked (such as 1 to 10 or low to high) or has some kind of numerical progression (such as measurements, counts, rates, or percentages) since colors don't necessarily imply a magnitude.

Syntax

SymbolizeByNumericField_ba (InputFeatureLayer, Field, ClassificationSchemeParameterName, {NameField}, {UseSelectedFeatures}, {ColorSchemeParameterName})

Parameter	Explanation	Data Type
InputFeatureLayer	The input feature layer.	Feature Layer
Field	The attribute field used to define the thematic map.	Field
ClassificationSchemeParameterName	The classification methods to thematically map your input feature class. Natural Breaks —Uses natural breaks classification to produce a thematic map. Std Deviation —Uses standard deviation classification method to produce a thematic map. Equal Interval —Uses equal interval classification method to produce a thematic map. Quantile —Uses quantile classification method to produce a thematic map.	String
NameField (Optional)	The attribute field used in the normalization calculations.	Field
UseSelectedFeatures (Optional)	Identifies the features that will be used to generate the thematic map. TRUE —Uses only selected features to generate the thematic map. FALSE —Uses all features to generate the thematic map. This is the default.	Boolean
ColorSchemeParameterName (Optional)	The color scheme for the thematic map.	String

Code Sample

SymbolizeByNumericField Example (Stand-alone Script)

# Name: SymbolizeByNumericField.py
# Description: Symbolizes block groups by total population.
# Author: ESRI

# Import system modules

import arcpy

arcpy.ImportToolbox("C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Business Analyst Tools.tbx")

try:
  # Acquire extension license 
  arcpy.CheckOutExtension("Business") 
 
  # Defines the parameters for the Symbolize by Numeric Field tool
  Input = "C:/Program Files/ArcGIS/Desktop10.0/Business Analyst/Data/BDS/esri_bg.bds"
  Fld= "TOTPOP_CY"
 
  # Thematically symbolizes a layer by a numeric field
  arcpy.SymbolizeByNumericField_ba(Input, Fld, "Equal Interval")
 
  # Release extension license 
  arcpy.CheckInExtension("Business")
     
except:
  print arcpy.GetMessages(2)

Environments

This tool does not use any geoprocessing environments

Licensing Information

ArcView: Requires Business Analyst

ArcEditor: Requires Business Analyst

ArcInfo: Requires Business Analyst