The beginning computer class for seniors uncovered a number of errors in Google's maps of Takoma Park. Nevertheless the maps are fun and we have embedded one near the bottom of the geography page. It is interactive so you can switch between satellite and street views, zoom in and out, drag it to a new area.
Yahoo is experimenting with a more interactive map, but it is still very beta and may crash your browser - so be careful. Neither Google nor Yahoo recognize the existence of this library in their "local" databases. Nor does AskJeeves. Try a search for library in 20912.
We usually use Mapquest for maps, though not for their local listings either, which are as inaccurate as those of the other services. They too don't think we exist.
Using some to the newer online map tools, or finding your way by GPS means thinking about places in terms of their coordinates, their latitudes and longitudes. So you need to learn how to
find the latitude and longitude if you know the address
Online mapping sites used to offer this geocoding. Now they don't, so go use geofinder. Free, fast and easy. Inaccurate, at least for the area near the library where it is off by about half a block. The unlying Census Bureau Tiger maps are probably wrong.