We present an improved lunar digital elevation model (DEM) covering latitudes within plus or minus 60 degree , at a horizontal resolution of 512pixels per degree (60m at the equator) and a typical vertical accuracy 3 to 4m. This DEM is constructed from geodetically-accurate topographic heights from the Lunar Orbiter Laser Altimeter (LOLA) onboard the Lunar Reconnaissance Orbiter, to which we co-registered 43,200 stereo-derived DEMs (each ) from the SELENE Terrain Camera (TC) (1010 pixels total). After co-registration, approximately 90% of the TC DEMs show root-mean-square vertical residuals with the LOLA data of <5m compared to 50% prior to co-registration. We use the co-registered TC data to estimate and correct orbital and pointing geolocation errors from the LOLA altimetric profiles (typically amounting to <10m horizontally and <1m vertically). By combining both co-registered datasets, we obtain a near-global DEM with high geodetic accuracy, and without the need for surface interpolation. We evaluate the resulting LOLA+TC merged DEM (designated as "SLDEM2015") with particular attention to quantifying seams and crossover errors.