The script includes some rough boundary checking to
imake sure you're in California, as the state hasn't been magnanimous enough to provide FC maps for OR, NV, AZ or MX.
Be sure to examine the popup closely, as it contains
ihe info on which grid, and an '''approximation''' of the location within that grid. The table is presented for those situations when you may need to access an adjacent map.
Be sure, before lowering any segments, to consult with a senior editor in the area. There are ''occasional'' deviations from the official map, for Waze purposes such as continuity along higher-typed routes.