GA Layer To Contour (Geostatisical Analyst)

Summary

Creates a feature class of coutours from a geostatiscal analysis layer. The output feature class can be either a line feature class of contour lines or a polygon feature class of filled contours.

Usage

• For data formats that support Null values, such as file and personal geodatabase feature classes, a Null value will be used to indicate that a prediction could not be made for that location or that the value showed be ignored when used as input. For data formats that do not support Null values, such as shapefiles, the value of -1.7976931348623158e+308 is used (this is the negative of the C++ defined constant DBL_MAX) to indicate that a prediction could not be made for that location.

Syntax

GALayerToContour_ga (in_geostat_layer, contour_type, out_feature_class, {contour_quality})

Parameter	Explanation	Data Type
in_geostat_layer	The geostatistical layer to be analyzed.	Geostatistical Layer
contour_type	Type of contour to represent the geostatistical layer. CONTOUR — The contour or isoline representation of the geostatistical layer. Displays the lines in either draft or presentation quality. FILLED CONTOUR —The polygon representation of the geostatistical layer. It assumes for the graphical display that the values between contour lines are the same for all locations within the polygon. Displays the lines in either draft or presentation quality.	String
out_feature_class	The output feature class will either be a polyline or a polygon, depending on the selected Contour type.	Feature Class
contour_quality (Optional)	Determines the smoothness of contour line representation. DRAFT — The default Draft quality presents generalized version of isolines for faster display. PRESENTATION —The Presentation option ensures more detailed isolines for the output feature class.	String

Code Sample

GALayerToContour interactive window example

Export a geostatistical layer to a contour feature class.

import arcpy
from arcpy import env
env.workspace = "C:/gapyexamples/data"
arcpy.GALayerToContour_ga("C:/gapyexamples/data/kriging.lyr", "Contour",
                          "C:/gapyexamples/output/krig_cont", "Presentation")

GALayerToContour script example

Export a geostatistical layer to a contour feature class.

# Name: GALayerToContour_Example_02.py
# Description: Exports a geostatistical layer to contours.
# Requirements: Geostatistical Analyst Extension

# Import system modules
import arcpy

# Set environment settings
arcpy.env.workspace = "C:/gapyexamples/data"

# Set local variables
inLayer = "C:/gapyexamples/data/kriging.lyr"
contType = "Contour"
outCont = "C:/gapyexamples/output/krig_cont"
contQuality = "Presentation"

# Check out the ArcGIS Geostatistical Analyst extension license
arcpy.CheckOutExtension("GeoStats")

# Execute GALayerToContour
arcpy.GALayerToContour_ga(inLayer, contType, outCont, contQuality)

Environments

Current Workspace, Output Coordinate System, Extent, Scratch Workspace

Licensing Information

ArcView: Requires Geostatistical Analyst

ArcEditor: Requires Geostatistical Analyst

ArcInfo: Requires Geostatistical Analyst