This report adds over 900 references on the numerical characterization of topography (geomorphometry , or terrain modeling) to a 1993 review of the literature and its 1995 and 1996 supplements. A number of corrections are included. The report samples recent advances in several morphometric topics, featuring six in greater depth landslide hazards, barchan dunes, sea-ice surfaces, abyssal-hill topography, wavelet analysis, and industrial-surface metrology. Many historical citations have been added. The cumulative archive now approaches 4400 references. * The few text citations not in the main bibliography (p. 10-56) are on either p. 9 or in 'Corrections' (p. 56-57). RJ.Pike / USGS OF 99-140 R.J.Pike/USGSOF99-140 Many publications on industrial-surface metrology are referenced in a new, chronologically ordered, bibliography that R.J.Pike / USGS OF 99-140 improves access to research on surface quantification not found in the usual geomorphology-related sources (Pike and Thomas, 1998). A brief essay prefacing the 4800 literature citations introduces metrology to Earth scientists, describes similarities and differences between the two realms (Scott, 1994,1997), and raises issues that must be addressed in any attempt to unify the practice of surface quantification. A sampling of Internet Web-site addresses and full abstracts of papers on metrology rounds out the main listing. Other recent morphometry More conventional areas of morphometry continue to thrive as well. Several of these are described above. A most important new development is the rapid increase in publication exclusively by CD-ROM and by posting on the Internet (Pike, 1998).