Observations of lunar occultations of the earth at 250 kHz, obtained with the Radio Astronomy Explorer 2 satellite, have been used to derive two-dimensional maps of the location of the sources of terrestrial kilometric radiation (TKR). By examining the two-dimensional source distributions as a function of the observer's location (lunar orbit) with respect to the magnetosphere, we can estimate the average three-dimensional location of the emission regions. Although TKR events at 250 kHz can often be observed at projected distances corresponding to the 250 kHz electron gyro or plasma level (R~2 RE), many events are observed much farther from the earth (5≲R≲15 RE). On the dayside we observed emission apparently in the region of the polar cusp and the magnetosheath at &Lgr;~75¿, and in the night hemisphere we find emission associated with regions of the magnetotail at &Lgr;>70¿. The nightside emission is suggestive of a mechanism involving plasma sheet electron precipitation in the premidnight sector.