function GetPointOnLine(const _distance: Double; const _offset: Double; const _part: Integer): TGIS_Point; virtual; overload;
Returns
found point; if _distance < 0, then point will be located before first point of the line; if _distance > Length, then point will be located after last point of the line
Description
Calculate a point located at _distance from the beginning and moved out of line by _offset.