Summary
Modifies the cap type (ending style) for representation stroke symbols and stores it as a representation override.
Illustration

Usage
- Representation stroke symbols that are relatively wide and drawn with multiple layers to display a "cased road" effect are often joined together at their endpoints with round line caps to prevent symbol gaps appearing at sharp angles between features. However, a round end cap is generally not desirable cartographic appearance for dead-end street (dangling line features that are not connected at their endpoint to another feature.) The line cap style is generally overriden to a butt or square style in these situations. This tool detects dangles and overrides the representation cap type of the stroke symbol. 
Syntax
CalculateLineCaps_cartography (in_features, {cap_type}, {dangle_option})| Parameter | Explanation | Data Type | 
| in_features | The input feature layer containing line representations. | Layer | 
| cap_type (Optional) | Defines how the ends of representation stroke symbols are drawn. The default cap type of representation strokes is round, where the symbol is terminated with a semicircle of radius equal to stroke width is centered at the line endpoint. This tool changes cap type to BUTT or SQUARE. 
 | String | 
| dangle_option (Optional) | Controls how line caps are calculated for adjoining line features that share an endpoint but are drawn with different symbology. 
 | String | 
Derived Output
| Name | Explanation | Data Type | 
| out_representations | Layer | 
Code sample
CalculateLineCaps example (Python window)
The following Python Window script demonstrates how to use the CalculateLineCaps tool in immediate mode.
import arcpy
arcpy.env.workspace = "C:\data"
arcpy.CalculateLineCaps_cartography("roads.lyr", "BUTT", "CASED_LINE_DANGLE")
CalculateLineCaps example (stand-alone script)
This stand-alone script shows an example of using the CalculateLineCaps tool.
# Name: CalculateLineCaps_standalone_script.py
# Description: calculates a value for the line cap property of a representation stroke layer
# Author: ESRI
 
# Import system modules
import arcpy
from arcpy import env
# Set environment settings
env.workspace = "C:/data"
# Set local variables
in_features = "roads.lyr"
cap_type = "BUTT"
dangle_option = "CASED_LINE_DANGLE"
# Execute Calculate Line Caps
arcpy.CalculateLineCaps_cartography(in_features, cap_type, dangle_option)
Environments
This tool does not use any geoprocessing environments.
Licensing information
- ArcGIS Desktop Basic: No
- ArcGIS Desktop Standard: Yes
- ArcGIS Desktop Advanced: Yes