Types of digitizing errors?

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01-21-2017 01:33 PM
MalcolmLittle
New Contributor III

I'm a bit out of practice, so could use some help. What are the following two digitizing errors called, and what tool in ArcToolbox corrects them?

digitizing errors with line features

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AbdullahAnter
Occasional Contributor III

This error can be correct by using topology .

But If you want to correct it quickly using Arc Toolbox . so :

The first case ( a ) it can be corrected by using Trim Line tool. Trim Line—Help | ArcGIS Desktop 

The second case ( b ) it can  be corrected by using Extend Line tool.  Extend Line—Help | ArcGIS Desktop 

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4 Replies
AbdullahAnter
Occasional Contributor III

This error can be correct by using topology .

But If you want to correct it quickly using Arc Toolbox . so :

The first case ( a ) it can be corrected by using Trim Line tool. Trim Line—Help | ArcGIS Desktop 

The second case ( b ) it can  be corrected by using Extend Line tool.  Extend Line—Help | ArcGIS Desktop 

ChrisDonohue__GISP
MVP Alum

Assuming the intent is for the lines to intersect cleanly:

  • Example A is called an Overshoot.
  • Example B is an Undershoot.

Chris Donohue, GISP

RebeccaStrauch__GISP
MVP Emeritus

And in old school coverage terminology, they could both be called dangles......with only one line into the node (end point).  A split line, that is two lines/arcs coming into a single node would make it a pseudo node, if I remember correctly.  Arcs were limited to 500 vertex/points and would sometimes require another node to break the line.

some useless trivia.   

JayantaPoddar
MVP Esteemed Contributor

You could also create topology to detect errors and take necessary actions. 

An overview of topology in ArcGIS—Help | ArcGIS for Desktop 



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