The "uszipcodes" Python package contains useful information about some places in the US that don't show up in the census data or ZIP code data we have. I think it's getting this information from some dataset from the US Postal Service.

If these places were in the library registry's database, we'd be able to understand the names of small towns such as Tolland, CT, which we currently can't do.

We can create a SearchEngine(simple_zipcode=False) object, which will immediately download the complete dataset, including basic polygon information for all cities. We can then iterate over all the cities in the dataset and check whether we already know about them. If it turns out we don't know about a given city, we can add it to the dataset as a place with a polygon.

– triggered when a user tries to add a place that is unknown