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Annotation of researchv10no/cmd/map/export/route.1, revision 1.1

1.1     ! root        1: .TH ROUTE 1
        !             2: .SH NAME
        !             3: route \- map orientations and great circle paths
        !             4: .SH SYNOPSIS
        !             5: .B route
        !             6: [ 
        !             7: .B -t
        !             8: ]
        !             9: .SH DESCRIPTION
        !            10: .I Route
        !            11: without an option
        !            12: reads from the standard input a sequence of points, expressed 
        !            13: as latitude-longitude pairs.
        !            14: For each pair of points, say A and B,
        !            15: .I route
        !            16: prints on the standard output
        !            17: .IP \-
        !            18: A
        !            19: .IR map (7)
        !            20: orientation, expressed as a
        !            21: .B -o
        !            22: option, that transforms the great circle from A to B into the equator.
        !            23: The transformed locations of A and B are located on the equator
        !            24: at equal distances west and east of the Prime Meridian.
        !            25: .IP \-
        !            26: The transformed coordinates of the two points.
        !            27: .IP \-
        !            28: The same information for a map orientation in which point A
        !            29: appears to the east and B to the west of the Prime Meridian.
        !            30: .PP
        !            31: Under option
        !            32: .B -t
        !            33: .I route
        !            34: produces coordinates along the great circle from A to B
        !            35: in the form of a track for use with 
        !            36: .I map
        !            37: option
        !            38: .BR -t .
        !            39: .PP
        !            40: Coordinates are expressed in degrees, with latitude
        !            41: positive north of the equator and longitude positive
        !            42: west of Greenwich.
        !            43: .SH EXAMPLES
        !            44: .HP
        !            45: .B "echo 40.75 74 52 0 | route -t | map mercator -l 30 70 -10 80 -t - | plot
        !            46: .br
        !            47: Produce a map of the North Atlantic with a great circle plotted
        !            48: from New York to London.
        !            49: .TP
        !            50: .B route
        !            51: .br
        !            52: .ns
        !            53: .TP
        !            54: .B 40.75 74 52 0
        !            55: Produces the output
        !            56: .RS
        !            57: .IP
        !            58: .nf
        !            59: .ft L
        !            60: -o 35.8283 -157.5308 -168.6148
        !            61: A -0.0000 24.9943
        !            62: B -0.0000 -24.9943
        !            63: -o -35.8283 22.4692 168.6149
        !            64: A -0.0000 -24.9943
        !            65: B 0.0000 24.9943
        !            66: .ft
        !            67: .fi
        !            68: .RE
        !            69: .IP
        !            70: From this we derive the following command to draw a strip map 
        !            71: 20 degrees wide along the great circle from New York to London.
        !            72: The
        !            73: .B -w
        !            74: option windows the map in the new coordinate system, where
        !            75: the equator runs along the great circle and the two cities
        !            76: sit at 25W and 25E on that `equator'.
        !            77: The
        !            78: .B -l
        !            79: option avoids surveying the whole rest of the world for
        !            80: plottable points.
        !            81: .IP
        !            82: .B
        !            83: map mercator -o 35.83 -157.53 -168.61 -w -10 10 -30 30 -l 30 75 -10 80
        !            84: .SH SEE ALSO
        !            85: .IR map (7)

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