- pysteps.verification.salscores.sal_location(prediction, observation, thr_factor=None, thr_quantile=None, tstorm_kwargs=None)#
Compute the first parameter of location component for SAL based on [WPHF08].
This parameter indicates the normalized distance between the center of mass in observation and forecast.
prediction (array-like) – Array of shape (m,n) with prediction data. NaNs are ignored.
observation (array-like) – Array of shape (m,n) with observation data. NaNs are ignored.
thr_factor (float, optional) – Factor used to compute the detection threshold as in eq. 1 of [WHZ09]. If not None, this is used to identify coherent objects enclosed by the threshold contour thr_factor * thr_quantile(precip).
thr_quantile (float, optional) – The wet quantile between 0 and 1 used to define the detection threshold. Required if thr_factor is not None.
tstorm_kwargs (dict, optional) – Optional dictionary containing keyword arguments for the tstorm feature detection algorithm. If None, default values are used. See the documentation of
location – The location component with value between 0 to 2 and 0 denotes perfect forecast in terms of location. The returned value is NaN if no objects are detected in either the prediction or the observation.
- Return type: