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Graphics for Data Quality

Learn about the importance of positional accuracy in graphics for data quality through real-world examples, focusing on vertical and horizontal accuracy. Discover why accurate positioning matters, using the location of a monument as an example. Compare published coordinates (NAD83(86) and NAD83(HARN)) with the true location determined by GPS coordinates. Explore the accuracy of a monument at DFW Airport Bldg with a GPS target scale of 1:850 and a scale of 1:50, where each pixel represents 1.6 feet.

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Graphics for Data Quality

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  1. Graphics for Data Quality

  2. Examples of Accuracy

  3. Vertical Horizontal Why Positional Accuracy Matters!

  4. Location of Monument in “our data” Published Coordinates NAD83(86) NAD83(HARN) “true location” Our GPS Coordinates USGS Monument DFW Airport Bldg With GPS target Scale 1 : 850 Scale: 1 : 50 Each pixel is 1.6 feet

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