old_contents: from gfsad.models import db
  from sqlalchemy import ForeignKey
  
  
  class Point(db.Model):
      __tablename__ = 'point'
      id = db.Column(db.Integer, primary_key=True)
  
      location_id = db.Column(db.Integer, ForeignKey('location.id'), index=True, nullable=False)
      date_taken = db.Column(db.DateTime, nullable=False)
      lat = db.Column(db.Float, nullable=False)
      lon = db.Column(db.Float, nullable=False)
      accuracy = db.Column(db.Float)
      heading = db.Column(db.Float)
      speed = db.Column(db.Float)
      altitude = db.Column(db.Float)
new_contents: from gfsad.models import db
  from sqlalchemy import ForeignKey
  
  
  class Point(db.Model):
      __tablename__ = 'point'
      id = db.Column(db.Integer, primary_key=True)
  
      location_id = db.Column(db.Integer, ForeignKey('location.id'), index=True, nullable=False)
      date_taken = db.Column(db.DateTime, nullable=False)
      lat = db.Column(db.Float, nullable=False)
      lon = db.Column(db.Float, nullable=False)
      accuracy = db.Column(db.Float)
      heading = db.Column(db.Float)
      speed = db.Column(db.Float)
      altitude = db.Column(db.Float)
      altitude_accuracy = db.Column(db.Float)
subject: add altitude accuracy