xm_map


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


  • Xmap8: Three-dimensional GIS for Geology and Geophysics.

    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.

    Address:

      
          Prof. Jonathan M. Lees
          Yale Geology Dept.
          P.O. Box 208109
          New Haven, CT  06520-8109
          (203)432-6947
          lees@love.geology.yale.edu