Data/hora: 23/06/2024 10:25:05

Biblioteca(s): | Embrapa Solos.
Data corrente: | 22/11/2002
Data da última atualização: | 22/11/2002
Autoria: | HALL, J. K.; SCHWARTZ, E.; CLEAVE, R. L. W.
Título: | The Israeli DTM (Digital Terrain Map) project.
Ano de publicação: | 1990
Fonte/Imprenta: | In: HANLEY, J.T.; MERRIAM, D.F. Microcomputer applications in geology, II. Oxford: Pergamon Press, 1990.
Páginas: | p. 111-118
ISBN: | 0 08 040261 5
Idioma: | Inglês
Conteúdo: | The Geological Survey of Israel, Historical Productions, Inc., and the Israel Mapping Center have undertaken the production of a new high-resolution digital terrain map (DTM) of Israel. The new DTM is based upon the topographic information contained in the 10 m contours of the 99 partial or complete 20-km square 1:50,000-scale topographic maps of the Israel Mapping Center. The grid used is 25m, locked into the Cassini-Soldner projection of the standart Israel Grid. For each of the 1:50,000 topographic sheets, this grid can be visualized as an overlay of one-half millimeter squares, representing 641,601 elevation points per 400 km2 map. An inexpensive PC AT system with EGA graphics and high-resolution digitizer with 16 button cursor is used to edit a matrix of EGA screens of the maps which are scanned using commercial prepress scanners. FORTRAN programs with HALO graphics routnes facilitate the editing and directly convert color-coded intervals between contours to a 25 m DTM using weighted means of points interpolated by bicubic splines from both N-S and E-W topographic profiles. Special modules allow inclusion of additional nonstandard contours, spot heights, and profile data, as well as steep discontinuities in the surface to be digitized. The initial use of the DTM elevations will be to enable Historical Productions to calculate the heights of the individual 10 m pixels of a merged SPOT/LANDSAT image mosaic of all of Israel and the adjacent areas for the purpose of producing computer-generated oblique synoptic...
Palavras-Chave: | Processamento de dados; Programacao.
Thesagro: | Geologia; Microcomputador.
Categoria do assunto: | --
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (999-1) - ADC - PL - -- - 551 - H233m - 1993.0015 - DIS