anchor.diff:  
   
   + Parameters
  -    + timeSpan: 'PT15M, PT5M' (string required)
  +    + temporalResolution: 'PT15M, PT5M' (string required)
            - time span interval in which lightning should be weighted
   
       + spatialResolution '0.5, 0.25, 0.05' (string required)
  
positive.code: 
  # Weighted Lightning
  
  ## Retrieve weighted lightning observation [?timeSpan={timeSpan}&spatialResolution={resolution}&locationWithin={lonTopLeft,latTopLeft,lonBottomRight,latBottomRight}&occurrenceFrom={startTime}&occurrenceUntil={endTime}]
  ## Retrieve weighted lightning observation [?timeSpan={timeSpan}&spatialResolution={resolution}&locationWithin={lonTopLeft,latTopLeft,lonBottomRight,latBottomRight}&occurrenceFrom={startTime}]
  
  
  #### Example
  https://lightning.weather.mg/weigh?&timeSpan=PT15M&spatialResolution=0.5&locationWithin=[-10,80],[10,5]&occurrenceFrom=2017-01-05T12:19:14Z&occurrenceUntil=2017-01-05T12:21:15Z
  https://lightning.weather.mg/weigh?&timeSpan=PT15M&spatialResolution=0.5&locationWithin=[-10,80],[10,5]&occurrenceFrom=2017-01-05T12:19:14Z
  https://lightning.weather.mg/weigh?&timeSpan=PT15M&spatialResolution=0.5&locationWithin=[-10,80],[10,5]
  
  ### Observed weighted lightning for a given boundingBox, time period, weighted by time span and spatial resolution
  
  
negative.code:                                            latitude top left,
                                             longitude bottom right,
                                             latitude bottom_right, required)
          - longitude in degree numeric format and in range <-180,180> eg. -123.454, 179.864
          - latitude in degree numeric format and in range <-90,90> eg. -85.541, 5.32,
  
      + occurrenceFrom: `2017-01-05T12:21:14Z` (start time range, optional)
          - start lightning observation time. End time is current time by default, setup by the service.
  