TY - RPRT TI - Digital computer terrain mapping from multispectral data, and evaluation of proposed Earth Resources Technology Satellite /ERTS/ data channels, Yellowstone National Park - Preliminary report AU - Hoffer, R. M. AU - Pierce, K. L. AU - Smedes, H. W. AU - Tanguay, M. G. PY - 1969 UR - https://ntrs.nasa.gov/citations/19710009779 ID - 19710009779 ER -