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I know what is a polygon but when a polygon is said to be double digitized? I failed to find a suitable meaning of double digitized after googling. I understand double digitized means digitized twice, so I hope it would be enough if someone explains what does digitized polygon mean. I found the term double digitized from source . ESRI Shapefile Technical Description (page 1)

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    I think you should always try using search engines prior to posting e.g. google.com/search?q=double+digitized – PolyGeo Sep 18 '15 at 9:21
  • I asked the question because I failed to find a suitable meaning of double digitized after googling. I am completely new in this area so it would be great help if one explains the meaning of the term double digitized. – Farsan Rashid Sep 18 '15 at 10:15
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    Your question does not mention that you googled or that you found any definition for the term you are asking about. You can address this by using the edit button beneath your question to revise it. – PolyGeo Sep 18 '15 at 10:22
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When I googled for "double digitized" the fourth non-paid result was the Practical Handbook of Digital Mapping Terms and Concepts by Sandra Arlinghaus:

double-digitized polygons

when polygons are recorded as closed loops of coordinates, the first and last coordinates are the same; therefore, boundaries of adjacent polygons are digitized twice.

I would also call it double-digitizing any time the same polygon is inadvertently digitized a second time.

  • In the context of the OP's research, the more general definition, of polygons stored as rings (vice a directed graph of arcs) probably holds sway. – Vince Sep 18 '15 at 11:11

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