Types of digitizing errors?

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01-21-2017 01:33 PM
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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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Regular Contributor II

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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Regular Contributor II

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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MVP Frequent Contributor

Assuming the intent is for the lines to intersect cleanly:

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

Chris Donohue, GISP

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MVP Esteemed Contributor

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.   

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Honored Contributor

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

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