NAME xm_map - Map format for the xmap8 program SYNOPSIS xm_map - Input File Format DESCRIPTION Maps in xmap8 come in 3 formats: default (dumb map) gmt_style (dumb map) lees_format (smart format) A "smart format" map is one that has various attributes that allow the user to control plotting or processing. lees_format maps include information about whether they are point, line or fill objects, color for plotting and an ascii code for determining the kind of object (river, thrust fault or high- way?). The program works best when using lees_format maps and they recommended. If you use lees-format maps you can have numerous entries on the command line. FORMAT Default map Format is an ASCII file with alist of strokes: Lat1 Lon1 Lat2 Lon2 (which represents a stroke in lat-lon) ------------------------------------------------------------- GEOLOGICAL MAP FORMAT Identification number_of_points Style Color kind minlat maxlat minlon maxlon Identification = 8 character id the first 4 chars are used for the geological formation name number_of_points = number of lat-lon pairs associated with this id Style = style of object: 1 = point (then number_of_points must be 1) 2 = line 3 = filled object (geological unit) Color = use this number from 1-20 for different color formations color(0) = black color(1) = white color(others) = various colors Kind ----------------------------------------------------- GMT style: each stroke is a list of lat-lons. separated by the ">" character" > first stroke lon1 lat1 lon2 lat2 lon3 lat3....etc > second stroke ....etc --------------- NOTE: By default GMT uses lon-lat instead of lat lon. This conventions is followed here. If the first line in the file contains the string "latlon", however, the entries are switched to lat-lon (the standard lees convention) ----------------------------- lees_format Geologic maps: This is the same as GMT format accept: LAT LON is the default, and the first line contains the information for the 3D GIS data base: > strokename num type color code lat1 lat2 lon1 lon2 NOTE: the ">" must be in the first line of each stroke by convention num = number of points in stroke type = 1 = points 2 = line 3 = fill object color = color to plot - see documentation on color selection code = ascii character (0-9, a-z, A-Z) describing object. This is a convention chosen by the users. Presently I use these codes: a = major coasts islands lakes b = intermediate coasts islands lakes c = minor coasts islands lakes d = very minor coasts islands lakes e = major rivers f = intermediate rivers g = minor rivers h = very minor rivers i = political borders j = major faults k = minor faults l = geology formation m = major high ways n = minor roads p = plates 0 = generic (when running xmap8 a plotting code may be supplied to select off those parts of the geologic maps one needs) lat1 lat2 lon1 lon2 = min-max bounds on the stroke. (this is important for selections from large data-bases) Example: > CPLS0001 125 3 1 0 34.1767 34.3752 -116.967 -116.560 34.0000 -116.000 SEE ALSO xmap8 xm_color xm_hypo xm_map xm_menu xm_origin xm_points xm_raster xm_station xm_well xm_wire xm_xsec xm_ellipse
REFERENCES see article by J. M. Lees: Lees, J. M. (1995) Xmap8: Three-dimensional GIS for geology and geophysics, Seismological Research Letters: 66, 33-37.
Prof. Jonathan M. Lees Yale Geology Dept. P.O. Box 208109 New Haven, CT 06520-8109 (203)432-6947 lees@love.geology.yale.edu