Return to README CVS log

Up to [Research Unix] / researchv10no / cmd / map / lox

Annotation of researchv10no/cmd/map/lox/README, revision 1.1

1.1     ! root        1: lox deg
        !             2: computes a loxodrome inclined at angle "deg" from
        !             3: the equator; deg=45 for NE, deg=-45 for SE.
        !             4: The loxodrome begins at lat,lon=0,0 and continues
        !             5: through north latitudes.  The output fields are:
        !             6:        phi     latitude
        !             7:        x       coord of developed loxodrome
        !             8:        y       ditto
        !             9:        theta   (east!) longitude of point on loxodrome
        !            10:        chi     angle of inclination (slope) of developed loxodrome
        !            11: Both theta and chi increase continuously (beyond 360)
        !            12: 
        !            13: map loxodromic deg options
        !            14: draws a map based on the developed loxodrome.  The globe is
        !            15: cut along the antipodal loxodrome and points are displayed
        !            16: at true distance from the developed central loxodrome.
        !            17: The usual map options apply.
        !            18: Latitudes beyond 85 are deemed unplottable; higher latitudes
        !            19: could be squeezed out in some instances.
        !            20: 
        !            21: sh dolox deg options
        !            22: makes the map with the boundary cut drawn.
        !            23: If option -o is present, it must be first, and it should be
        !            24: -o 90 ? ?  (For uninvestigated reasons, the scale of an
        !            25: off-axis projection comes out a bit wrong, so you have to
        !            26: hand-tune the drawing of the boundaries, as has been done
        !            27: in "sh noedge"; see the differing -p options there.  One
        !            28: contributor to the discrepancy: linear interpolation.)
        !            29: 
        !            30: This projection uses the heavy artillery of a general
        !            31: integrator and a general equation solver from the port 3
        !            32: library.  This triples the size of the object code of map;
        !            33: moreover it requires a corrected version of subroutine ds7grd,
        !            34: not in the publicly available Port 3.  Hence the loxodromic 
        !            35: projection is not normally included in "map".

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.