I have a dataset in Json format containing XYZ-Coordinates, and I need to extract the circular region around the nearest point from this dataset and remove the noise(outlier) . I'm incorporating bias and variance analysis, as well as applying linear regression for model accuracy. For nearest neighbor calculations, I'm using K-Nearest Neighbors (KNN) and SVM with kernel functions. However, the results are not as accurate as expected. Dataset can be downloaded from the Link below

This is the issue: Remove Noise near the start Click

DataSet: DataSet in Json Format