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Positional Accuracy and Cartographic Representation of Spatial Features
Positional Accuracy and Cartographic Quality
Download the PDF version of the page here.
Graphical Presentation of Quantitative Method to Measure Positional Accuracy
Graphical Presentation of Position Accuracy 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)Graphical Presentation of Resolution and Scale of the Map
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 |
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