transbigdata.ellipse_params

transbigdata.ellipse_params(data, col=['lon', 'lat'], confidence=95, epsg=None)

confidence ellipse parameter estimation for point data

Parameters:

  • data (DataFrame) – point data

  • confidence (number) – confidence level: 99，95 or 90

  • epsg (number) – If given, the original coordinates are transformed from WGS84 to the given EPSG coordinate system for confidence ellipse parameter estimation

  • col (List) – Column names, [lon，lat]

Returns:

params – Centroid ellipse parameters[pos,width,height,theta,area,oblateness] Respectively [Center point coordinates, minor axis, major axis, angle, area, oblateness]

Return type:

List