Error Ellipses Visualization
Creation, interaction and visualization of error ellipses for survey engineers
(Created by Swatchai Kriengkraipet)
Input data for error ellipses plotting
(Representing precision quantities)
Another error ellipse to plot
The resulting covariance matrix of (x,y)
Eigen values/vectors of covariance matrix
| Eigen values |
Eigen vectors |
| λ1 |
v1 |
| λ2 |
v2 |
Error ellipses' parameters
| Parameters |
Std. EE |
EE_ |
| Semi major axis (a) |
sqrt(λ2) |
sqrt(λ2) |
| Semi minor axis (b) |
sqrt(λ1) |
sqrt(λ1) |
| Axis_a rotation from N |
eigen_v |
eigen_v |
©2021 Swatchai Kriengkraipet, Chulalongkorn University, Bangkok