While Craigslist refuses to loosen its grip on location-based listing browsers PadMapper and 3Taps, it has begun testing new mapping features of its own. According to Talking Points Memo, the company has rolled out embedded maps for housing listings in San Francisco and Portland. New listings in the supported areas now include an integrated map that indicates the location of the available apartment or home. The feature is powered by OpenStreetMap, a free and open maps platform which is also being used by Apple for maps data in iOS 6. Compared to PadMapper or 3Taps, however, the utility of Craigslist's embedded maps is still largely superficial, providing only basic locational context and offering no means of browsing or filtering listings by area. With Craigslist testing the feature under the radar, it's unclear when it might be offered in other areas or new functions may be added.