Calculate Geodesic Angle (Cartography)
Summary
Calculates geodesic angles for the input features according to the defined coordinate system, and assigns the angle values to the specified field in the feature class that contains the input features.
Legacy:This tool has been deprecated and replaced by the Calculate_Grid_Convergence_Angle tool.
Usage
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Angles are calculated according to the coordinate system of the active data frame of the current map document or the Coordinate System geoprocessing environment variable, if it is set. This environment setting must be set to execute the tool from ArcCatalog.
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The input features can be points, lines, or polygons. For a point feature, the point location will be used to calculate the geodesic angle. For a line or polygon feature, the center point (centroid) of geometry will be used to calculate the geodesic angle.
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A field must be present in the input feature attribute table to store the calculated angles. The stored angles are in decimal degrees.
Syntax
| Parameter | Explanation | Data Type |
in_features |
The input features for which geodesic angles will be computed. | Feature Layer |
angle_field |
The field that will be updated with the geodesic angle values in decimal degrees. | Field |
Code Sample
The following Python window script demonstrates how to use the CalculateGeodesicAngle tool in immediate mode.
import arcpy
from arcpy import env
env.workspace = "C:\data"
arcpy.CalculateGeodesicAngle_cartography("cities", "city_angle")
This stand-alone script shows an example of using the CalculateGeodesicAngle tool.
# Name: CalculateGeodeisAngle_standalone_script.py # Description: calculates a geodesic angle for a polygon # Import system modules import arcpy from arcpy import env # Set environment settings env.workspace = "C:/data" # Set local variables in_features = "cities" angle_field = "city_angle" # Execute Calculate Geodesic Angle arcpy.CalculateGeodesicAngle_cartography((in_features, angle_field)