83 lines
4 KiB
Bash
Executable file
83 lines
4 KiB
Bash
Executable file
#!/bin/rc
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fn demo {proj=$1; shift;
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label=$1; shift;
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{ echo 'o'
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echo 'ra -8192 -8492 8192 8492'
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echo 'e'
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echo 'm -8192 8192'
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echo t $type
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echo 'm -8192 -8192'
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echo t $proj - $label
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MAP=world MAPDIR=/lib/map map $proj $* -s -d 5
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}
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sleep 5
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}
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rfork en
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{
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type='Equatorial projections centered on long. 0. Parallels are straight lines.'
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demo mercator 'equally spaced straight meridians, conformal, straight compass courses'
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demo sinusoidal 'equally spaced parallels, equal-area, same as bonne(0)'
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demo cylequalarea 'equally spaced straight meridians, equal-area, true scale on Eq' 0
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demo cylindrical 'central projection on tangent cylinder'
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demo rectangular 'equally spaced parallels, equally spaced straight meridians, true scale on Eq' 0
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demo gall 'parallels spaced stereographically on prime meridian, equally spaced straight meridians, true scale on Eq' 0
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demo mollweide '(homalographic) equal-area, hemisphere is a circle'
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demo gilbert 'globe mapped conformally on hemisphere, viewed orthographically'
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type='Azimuthal: centered on the North Pole, Parallels are concentric circles, Meridians are equally spaced radial lines'
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demo azequidistant 'equally spaced parallels, true distances from pole'
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demo azequalarea 'equal area'
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demo gnomonic 'central projecton on tangent plane, straight great circles'
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demo perspective 'viewed along earth''s axis 2 earth radii from center of earth' 2
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demo orthographic 'viewed from infinity'
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demo stereographic 'conformal, projected from opposite pole'
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demo laue 'radius = tan(2\(mu colatitude ), used in xray crystallography'
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demo fisheye 'fisheye view of stereographic map, index of refraction 2' 2 -o 40.75 74
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demo newyorker 'New Yorker map from viewing pedestal of radius .5' .5 -o 40.75 74
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type='Polar conic projections symmetric about the Prime Meridian. Parallels are segments of concentric circles.'
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demo conic 'central projection on cone tangent at 40' 40
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demo simpleconic 'equally spaced parallels, true scale on 20 and 50' 20 50
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demo lambert 'conformal, true scale on 20 and 50' 20 50
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demo albers 'equal-area, true scale on 20 and 50' 20 50
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demo bonne 'equally spaced parallels, equal-area, parallel 40 developed from tangent cone' 40
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type='Projections with bilateral symmetry about the Prime Meridian and the equator.'
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demo polyconic 'parallels developed from tangent cones, equally spaced along Prime Meridian'
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demo aitoff 'equal-area projection of globe onto 2-to-1 ellipse, based on azequalarea'
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demo lagrange 'conformal, maps whole sphere into a circle'
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demo bicentric 'points plotted at true azimuth from two centers on the equator at longitudes +-40, great circles are straight lines' 40
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demo elliptic 'points are plotted at true distance from two centers on the equator at longitudes +-40' 40
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demo globular 'hemisphere is circle, circular meridians and parallels'
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demo vandergrinten 'sphere is circle, meridians as in globular, circular arc parallels resemble mercator'
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type='Doubly periodic conformal projections.'
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demo guyou 'W and E hemispheres are square'
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demo square 'World is square with Poles at diagonally opposite corners'
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demo tetra 'map on tetrahedron with edge tangent to Prime Meridian at S Pole, unfolded into equilateral triangle'
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demo hex 'world is hexagon centered on N Pole, N and S hemispheres are equilateral
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triangles'
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type='Retroazimuthal projections. Directions to center are true.'
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demo mecca 'equally spaced vertical meridians' 21.4 -o 90 -39.8
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demo homing 'distances to Mecca are true' 21.4 -o 90 -39.8
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type='Miscellaneous projections.'
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demo harrison 'oblique perspective from above the North Pole, 2 earth radii from the earth, looking along the Date Line 40 degrees off vertical' 2 40
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demo trapezoidal 'equally spaced parallels, straight meridians equally spaced along parallels, true scale at 20 and 50 on Prime Meridian' 20 50
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demo lune 'conformal, polar cap above Eq is 60-degree lune' 0 60
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type='Maps based on the spheroid'
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demo sp_mercator 'equally spaced straight meridians, conformal'
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demo sp_albers 'equal-area, true scale on 20 and 50' 20 50
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} | plot
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