Extend Line (Editing)
This tool extends line segments to the first intersecting feature within a specified distance. If no intersecting feature is within the specified distance, the line segment will not be extended. Tool use is intended for quality control tasks such as cleaning up topology errors in features that were digitized without having set proper snapping environments.
If no Extend Length is specified, segments will be extended to the first intersecting feature.
If the Extend to Extensions option is used, line segments can be extended to existing line features as well as other extended line segments within the specified extend length, forming intersections between two extensions.
A feature can be extended to itself, if it is the first intersecting feature.
If a feature layer or feature class with a selection is used as the input, only the selected features will be extended. All features within the layer or feature class will be used to assess if an extension can be performed, but only the selected features will be modified.
This tool will not change any feature attributes, except the managed geometry (length) fields in a personal, file, or SDE geodatabase feature class.
This tool modifies the input data. See Tools with no outputs for more information and strategies to avoid undesired data changes.
The line input features to be extended.
The maximum distance a line segment can be extended to an intersecting feature.
Controls whether line segments can be extended to other extended line segments within the specified extend length.
The following Python Window script demonstrates how to use the Extend Line tool.
import arcpy arcpy.env.workspace = "C:/data" arcpy.ExtendLine_edit("majorrds.shp", "15 Feet", "EXTENSION")
Clean up street centerlines that were digitized without having set proper snapping environments
# Name: ExtendLine.py # Description: Clean up street centerlines that were digitized without # having set proper snapping environments # Author: ESRI # import system modules import arcpy from arcpy import env # Set environment settings env.workspace = "C:/data" # Make backup copy of streets feature class, since modification with # the Editing tools below is permanent streets = "majorrds.shp" streetsBackup = "C:/output/Output.gdb/streetsBackup" arcpy.CopyFeatures_management(streets, streetsBackup) # Trim street lines to clean up dangles arcpy.TrimLine_edit(streets, "10 Feet", "KEEP_SHORT") # Extend street lines to clean up dangles arcpy.ExtendLine_edit(streets, "15 Feet", "EXTENSION")