1 / 9

Error detection

Error detection. Types of errors. Digitizing errors overshooting undershooting polygons do not close missing data. Contour lines never cross!!. An example of horrible digitizing!!!. overshooting. “dangling” node. River digitized in the wrong direction.

rad
Download Presentation

Error detection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Error detection

  2. Types of errors • Digitizing errors • overshooting • undershooting • polygons do not close • missing data

  3. Contour lines never cross!! An example of horrible digitizing!!!

  4. overshooting “dangling” node

  5. River digitized in the wrong direction

  6. Digitizing rivers in the wrong direction creates “canyon” -like features instead of river valleys 3900 m 3500m

  7. Types of errors • Location errors (x,y coordinates) • Edge matching (“seamless”)

More Related