Positional Accuracy and Cartographic Representation of Spatial Features

Positional Accuracy and Cartographic Quality

Graphical Presentation of Quantitative Method to Measure Positional Accuracy

Graphical Presentation of Position Accuracy Calculation (Click on it) Graphical Presentation of Position Accuracy Calculation (Click on it) Detailed Method of Position Error Calculation (Click on it)Detailed Method of Position Error Calculation (Click on it)

Animation to Calculate Acceptable Error and Allowable RMS

The following animation can be used to calculate the allowable RMS.

Calculation of allowable RMS (Klick on it)Calculation of allowable RMS (Klick on it)

Graphical Presentation of Resolution and Scale of the Map

Relationship of scale and minimum mapping unit (Click on it)Relationship of scale and minimum mapping unit (Click on it)

Calculate the Positional Accuracy

Calculate Average Distance Error, Standard Deviation of Distance Error, RMS, Positional accuracy at 80%, 90% and 95% confidence level based on the following dataset.

Point TrueX TrueY MapX MapY
A 53 58 54 60
B 48 86 51 84
C 30 36 28 36
D 70 172 68 174
E 20 25 20 25
F 174 203 171 204