First… ArcMap is really picky If you’re having problems with a CSV:

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Presentation transcript:

First… ArcMap is really picky If you’re having problems with a CSV: Check the file in NotePad or NotePad++ Excel will hide characters and reformat your data! Header names must be 10 letters or less, no punctuation or spaces No special characters in cells BlueSpray and QGIS are less picky For this assignment, GoogleDocs did something bad.

What happened? Group Benchmark Location NAME Latitude Longitude y_proj x_proj 2 40.871813 -124.080055 3 40.871803 -124.080047 4 40.871804 5 40.871809 -124.080058 6 -124.080059 7 8 9 40.871808 10 11 40.871773 -124.079989 12 -124.079944 13 -124.080066 14 40.871651 -124.080081 15 40.871554 -124.080042 16 40.871822 -124.080043 17 40.871371 -124.080125 18 40.87128 -124.08023 19 40.871824 -124.08004 40.87155 -124.08 4525059 408982.7 40.8716 4525065 408983.3 40.87145 4525048 408979.6 40.87141 4525044 408980.5 40.87135 4525037 408977.8 40.87139 4525041 408976.2 South Stairs B01 40.87148 4525052 408979.4 B02 408979.8 B03 4525051

What happened?

Accuracy and Precision These are the formal terms, accuracy is often used to refer to uncertainty in general High Accuracy Low Precision Low Accuracy High Precision http://en.wikipedia.org/wiki/Accuracy_and_precision

Accuracy and Precision Accuracy = distance from truth Precision = repeatability Wikipedia

Precision Estimate: Manage: Report Standard Deviation: Precision Standard Error: Precision Confidence Interval: Precision Min/Max: Precision Manage: Significant Digits Data types: Doubles, Long Integers Report

Standard Deviation (Precision) Each band represents one standard deviation Source: Wikipedia 8

RMSE From Higher Accuracy