code: def get(self, pos):
          
          latitude = int(round(pos['latitude']))
          search_set = self.bins[latitude]
          i = 1
          if latitude - i >= -90:
              search_set += self.bins[latitude-i]
          if latitude + i <= 90:
              search_set += self.bins[latitude+i]
          while len(search_set) == 0 and i <= 200:
              if latitude - i >= -90:
                  search_set += self.bins[latitude-i]
              if latitude + i <= 90:
                  search_set += self.bins[latitude+i]
              i += 1
          return find_closest(search_set, pos)
docs: Get the closest dataset.