TY - GEN AU - Tsai-Hong Hong AU - Steven Legowik AU - Marilyn Nashman C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1998-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.6213 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1998 TI - Obstacle detection and mapping system: ER -