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| author | rsc <devnull@localhost> | 2005-01-14 03:45:44 +0000 |
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| committer | rsc <devnull@localhost> | 2005-01-14 03:45:44 +0000 |
| commit | 78e51a8c6678b6e3dff3d619aa786669f531f4bc (patch) | |
| tree | 015e00fde4fc837fd31b705e18d17dc913829388 /man/man1/map.html | |
| parent | 2634795b5f0053bc0ff08e5d7bbc0eda8efea061 (diff) | |
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diff --git a/man/man1/map.html b/man/man1/map.html new file mode 100644 index 00000000..6ed18ccb --- /dev/null +++ b/man/man1/map.html @@ -0,0 +1,483 @@ +<head> +<title>map(1) - Plan 9 from User Space</title> +<meta content="text/html; charset=utf-8" http-equiv=Content-Type> +</head> +<body bgcolor=#ffffff> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=10><td> +<tr><td width=20><td> +<tr><td width=20><td><b>MAP(1)</b><td align=right><b>MAP(1)</b> +<tr><td width=20><td colspan=2> + <br> +<p><font size=+1><b>NAME </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + map, mapdemo, mapd – draw maps on various projections<br> + +</table> +<p><font size=+1><b>SYNOPSIS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>map</font></tt> <i>projection</i> [ <i>option ...</i> ] + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>mapdemo + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + </font></tt> + +</table> +<p><font size=+1><b>DESCRIPTION </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <i>Map</i> prepares on the standard output a map suitable for display + by any plotting filter described in <a href="../man1/plot.html"><i>plot</i>(1)</a>. A menu of projections + is produced in response to an unknown <i>projection</i>. <i>Mapdemo</i> is a + short course in mapping. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + The default data for <i>map</i> are world shorelines. Option <tt><font size=+1>−f</font></tt> accesses + more detailed data classified by feature.<br> + <tt><font size=+1>−f</font></tt> [ <i>feature</i> ... ]<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Features are ranked 1 (default) to 4 from major to minor. Higher-numbered + ranks include all lower-numbered ones. Features are<br> + <tt><font size=+1>shore</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>4</font></tt>] seacoasts, lakes, and islands; option <tt><font size=+1>−f</font></tt> always shows + <tt><font size=+1>shore1<br> + ilake</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>2</font></tt>] intermittent lakes<br> + <tt><font size=+1>river</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>4</font></tt>] rivers<br> + <tt><font size=+1>iriver</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>3</font></tt>] intermittent rivers<br> + <tt><font size=+1>canal</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>3</font></tt>]<tt><font size=+1> 3</font></tt>=irrigation canals<br> + <tt><font size=+1>glacier<br> + iceshelf</font></tt>[<tt><font size=+1>12</font></tt>]<br> + <tt><font size=+1>reef<br> + saltpan</font></tt>[<tt><font size=+1>12</font></tt>]<br> + <tt><font size=+1>country</font></tt>[<tt><font size=+1>1</font></tt>-<tt><font size=+1>3</font></tt>]<tt><font size=+1> 2</font></tt>=disputed boundaries, <tt><font size=+1>3</font></tt>=indefinite boundaries<br> + <tt><font size=+1>state</font></tt> states and provinces (US and Canada only)<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + + </table> + In other options coordinates are in degrees, with north latitude + and west longitude counted as positive.<br> + <tt><font size=+1>−l</font></tt> <i>S N E W<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Set the southern and northern latitude and the eastern and western + longitude limits. Missing arguments are filled out from the list + –90, 90, –180, 180, or lesser limits suitable to the projection + at hand.<br> + + </table> + <tt><font size=+1>−k</font></tt> <i>S N E W<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Set the scale as if for a map with limits <tt><font size=+1>−l</font></tt> <i>S N E W</i> . Do not + consider any <tt><font size=+1>−l</font></tt> or <tt><font size=+1>−w</font></tt> option in setting scale.<br> + + </table> + <tt><font size=+1>−o</font></tt> <i>lat lon rot<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Orient the map in a nonstandard position. Imagine a transparent + gridded sphere around the globe. Turn the overlay about the North + Pole so that the Prime Meridian (longitude 0) of the overlay coincides + with meridian <i>lon</i> on the globe. Then tilt the North Pole of the + overlay along its Prime Meridian to latitude <i>lat + </i>on the globe. Finally again turn the overlay about its ‘North + Pole’ so that its Prime Meridian coincides with the previous position + of meridian <i>rot</i>. Project the map in the standard form appropriate + to the overlay, but presenting information from the underlying + globe. Missing arguments are filled out from the list + 90, 0, 0. In the absence of <tt><font size=+1>−</font></tt>o<tt><font size=+1>,</font></tt> the orientation is 90, 0, <i>m</i>, where + <i>m</i> is the middle of the longitude range.<br> + + </table> + <tt><font size=+1>−w</font></tt> <i>S N E W<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Window the map by the specified latitudes and longitudes in the + tilted, rotated coordinate system. Missing arguments are filled + out from the list –90, 90, –180, 180. (It is wise to give an encompassing + <tt><font size=+1>−l</font></tt> option with <tt><font size=+1>−w</font></tt>. Otherwise for small windows computing time + varies inversely with area!) + + </table> + <tt><font size=+1>−d</font></tt> <i>n</i> For speed, plot only every <i>n</i>th point.<br> + <tt><font size=+1>−r</font></tt> Reverse left and right (good for star charts and inside-out + views).<br> + <tt><font size=+1>−v</font></tt> Verso. Switch to a normally suppressed sheet of the map, such + as the back side of the earth in orthographic projection.<br> + <tt><font size=+1>−s1<br> + −s2</font></tt> Superpose; outputs for a <tt><font size=+1>−s1</font></tt> map (no closing) and a <tt><font size=+1>−s2</font></tt> map + (no opening) may be concatenated.<br> + <tt><font size=+1>−g</font></tt> <i>dlat dlon res<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Grid spacings are <i>dlat</i>, <i>dlon</i>. Zero spacing means no grid. Missing + <i>dlat</i> is taken to be zero. Missing <i>dlon</i> is taken the same as <i>dlat</i>. + Grid lines are drawn to a resolution of <i>res</i> (2° or less by default). + In the absence of <tt><font size=+1>−</font></tt>g<tt><font size=+1>,</font></tt> grid spacing is 10°.<br> + + </table> + <tt><font size=+1>−p</font></tt> <i>lat lon extent<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Position the point <i>lat, lon</i> at the center of the plotting area. + Scale the map so that the height (and width) of the nominal plotting + area is <i>extent</i> times the size of one degree of latitude at the + center. By default maps are scaled and positioned to fit within + the plotting area. An <i>extent</i> overrides option <tt><font size=+1>−k</font></tt>. + + </table> + <tt><font size=+1>−c</font></tt> <i>x y rot<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + After all other positioning and scaling operations have been performed, + rotate the image <i>rot</i> degrees counterclockwise about the center + and move the center to position <i>x</i>, <i>y</i>, where the nominal plotting + area is –1≤<i>x</i>≤1, –1≤<i>y</i>≤1. Missing arguments are taken to be 0. <tt><font size=+1>−x</font></tt> Allow + the map to extend outside the + nominal plotting area.<br> + + </table> + <tt><font size=+1>−m</font></tt> [ <i>file</i> ... ]<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Use map data from named files. If no files are named, omit map + data. Names that do not exist as pathnames are looked up in a + standard directory, which contains, in addition to the data for + <tt><font size=+1>−f</font></tt>,<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>world</font></tt> World Data Bank I (default)<br> + <tt><font size=+1>states</font></tt> US map from Census Bureau<br> + <tt><font size=+1>counties</font></tt> US map from Census Bureau<br> + The environment variables <tt><font size=+1>MAP</font></tt> and <tt><font size=+1>MAPDIR</font></tt> change the default map + and default directory.<br> + + </table> + <tt><font size=+1>−b</font></tt> [<i>lat0 lon0 lat1 lon1</i>... ]<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Suppress the drawing of the normal boundary (defined by options + <tt><font size=+1>−l</font></tt> and <tt><font size=+1>−w</font></tt>). Coordinates, if present, define the vertices of a + polygon to which the map is clipped. If only two vertices are + given, they are taken to be the diagonal of a rectangle. To draw + the polygon, give its vertices as a <tt><font size=+1>−u</font></tt> track. + + </table> + <tt><font size=+1>−t</font></tt> <i>file ...<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + The <i>files</i> contain lists of points, given as latitude-longitude + pairs in degrees. If the first file is named <tt><font size=+1>−</font></tt>, the standard input + is taken instead. The points of each list are plotted as connected + ‘tracks’.<br> + Points in a track file may be followed by label strings. A label + breaks the track. A label may be prefixed by <tt><font size=+1>"</font></tt>, <tt><font size=+1>:</font></tt>, or <tt><font size=+1>!</font></tt> and is + terminated by a newline. An unprefixed string or a string prefixed + with <tt><font size=+1>"</font></tt> is displayed at the designated point. The first word of + a <tt><font size=+1>:</font></tt> or <tt><font size=+1>!</font></tt> string names a special symbol (see option <tt><font size=+1>−y</font></tt>). + An optional numerical second word is a scale factor for the size + of the symbol, 1 by default. A <tt><font size=+1>:</font></tt> symbol is aligned with its top + to the north; a <tt><font size=+1>!</font></tt> symbol is aligned vertically on the page.<br> + + </table> + <tt><font size=+1>−u</font></tt> <i>file ...<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Same as <tt><font size=+1>−t</font></tt>, except the tracks are unbroken lines. (<tt><font size=+1>−t</font></tt> tracks appear + as dot-dashed lines if the plotting filter supports them.)<br> + + </table> + <tt><font size=+1>−y</font></tt> <i>file<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + The <i>file</i> contains <a href="../man7/plot.html"><i>plot</i>(7)</a>-style data for <tt><font size=+1>:</font></tt> or <tt><font size=+1>!</font></tt> labels in <tt><font size=+1>−t</font></tt> or + <tt><font size=+1>−u</font></tt> files. Each symbol is defined by a comment <tt><font size=+1>:</font></tt><i>name</i> then a sequence + of <tt><font size=+1>m</font></tt> and <tt><font size=+1>v</font></tt> commands. Coordinates (0,0) fall on the plotting point. + Default scaling is as if the nominal plotting range were <tt><font size=+1>ra −1 + −1 1 1</font></tt>; <tt><font size=+1>ra</font></tt> commands in <i>file</i> change the + scaling.<br> + + </table> + <p><font size=+1><b>Projections </b></font><br> + Equatorial projections centered on the Prime Meridian (longitude + 0). Parallels are straight horizontal lines. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>mercator</font></tt> equally spaced straight meridians, conformal, straight + compass courses<br> + <tt><font size=+1>sinusoidal</font></tt> equally spaced parallels, equal-area, same as <tt><font size=+1>bonne + 0</font></tt>.<br> + <tt><font size=+1>cylequalarea</font></tt> <i>lat0</i> equally spaced straight meridians, equal-area, + true scale on <i>lat0<br> + </i><tt><font size=+1>cylindrical</font></tt> central projection on tangent cylinder<br> + <tt><font size=+1>rectangular</font></tt> <i>lat0</i> equally spaced parallels, equally spaced straight + meridians, true scale on <i>lat0<br> + </i><tt><font size=+1>gall</font></tt> <i>lat0</i> parallels spaced stereographically on prime meridian, + equally spaced straight meridians, true scale on <i>lat0<br> + </i><tt><font size=+1>mollweide</font></tt> (homalographic) equal-area, hemisphere is a circle<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>gilbert()</font></tt> sphere conformally mapped on hemisphere and viewed orthographically<br> + + </table> + + </table> + <tt><font size=+1>gilbert</font></tt> globe mapped conformally on hemisphere, viewed orthographically + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Azimuthal projections centered on the North Pole. Parallels are + concentric circles. Meridians are equally spaced radial lines. + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>azequidistant</font></tt> equally spaced parallels, true distances from pole<br> + <tt><font size=+1>azequalarea</font></tt> equal-area<br> + <tt><font size=+1>gnomonic</font></tt> central projection on tangent plane, straight great circles<br> + <tt><font size=+1>perspective</font></tt> <i>dist</i> viewed along earth’s axis <i>dist</i> earth radii from + center of earth<br> + <tt><font size=+1>orthographic</font></tt> viewed from infinity<br> + <tt><font size=+1>stereographic</font></tt> conformal, projected from opposite pole<br> + <tt><font size=+1>laue</font></tt><i>radius</i> = tan(2×<i>colatitude</i>), used in X-ray crystallography<br> + <tt><font size=+1>fisheye</font></tt> <i>n</i> stereographic seen from just inside medium with refractive + index <i>n<br> + </i><tt><font size=+1>newyorker</font></tt> <i>rradius</i> = log(<i>colatitude</i>/<i>r</i>): <i>New Yorker</i> map from viewing + pedestal of radius <i>r</i> degrees + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Polar conic projections symmetric about the Prime Meridian. Parallels + are segments of concentric circles. Except in the Bonne projection, + meridians are equally spaced radial lines orthogonal to the parallels. + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>conic</font></tt> <i>lat0</i> central projection on cone tangent at <i>lat0<br> + </i><tt><font size=+1>simpleconic</font></tt> <i>lat0 lat1<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + equally spaced parallels, true scale on <i>lat0</i> and <i>lat1<br> + </i> + </table> + + </table> + <tt><font size=+1>lambert</font></tt> <i>lat0 lat1</i> conformal, true scale on <i>lat0</i> and <i>lat1<br> + </i><tt><font size=+1>albers</font></tt> <i>lat0 lat1</i> equal-area, true scale on <i>lat0</i> and <i>lat1<br> + </i><tt><font size=+1>bonne</font></tt> <i>lat0</i> equally spaced parallels, equal-area, parallel <i>lat0</i> + developed from tangent cone + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Projections with bilateral symmetry about the Prime Meridian and + the equator. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>polyconic</font></tt> parallels developed from tangent cones, equally spaced + along Prime Meridian<br> + <tt><font size=+1>aitoff</font></tt> equal-area projection of globe onto 2-to-1 ellipse, based + on <i>azequalarea<br> + </i><tt><font size=+1>lagrange</font></tt> conformal, maps whole sphere into a circle<br> + <tt><font size=+1>bicentric</font></tt> <i>lon0</i> points plotted at true azimuth from two centers + on the equator at longitudes <i>±lon0</i>, great circles are straight + lines (a stretched <i>gnomonic</i> )<br> + <tt><font size=+1>elliptic</font></tt> <i>lon0</i> points plotted at true distance from two centers + on the equator at longitudes <i>±lon0<br> + </i><tt><font size=+1>globular</font></tt> hemisphere is circle, circular arc meridians equally spaced + on equator, circular arc parallels equally spaced on 0- and 90-degree + meridians<br> + <tt><font size=+1>vandergrinten</font></tt> sphere is circle, meridians as in <i>globular</i>, circular + arc parallels resemble <i>mercator + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + </i> + Doubly periodic conformal projections. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>guyou</font></tt> W and E hemispheres are square<br> + <tt><font size=+1>square</font></tt> world is square with Poles at diagonally opposite corners<br> + <tt><font size=+1>tetra</font></tt> map on tetrahedron with edge tangent to Prime Meridian at + S Pole, unfolded into equilateral triangle<br> + <tt><font size=+1>hex</font></tt> world is hexagon centered on N Pole, N and S hemispheres are + equilateral triangles + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Miscellaneous projections. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>harrison</font></tt> <i>dist angle</i>oblique perspective from above the North Pole, + <i>dist</i> earth radii from center of earth, looking along the Date + Line <i>angle</i> degrees off vertical<br> + <tt><font size=+1>trapezoidal</font></tt> <i>lat0 lat1<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + equally spaced parallels, straight meridians equally spaced along + parallels, true scale at <i>lat0</i> and <i>lat1</i> on Prime Meridian<br> + <tt><font size=+1>lune(lat,angle)</font></tt> conformal, polar cap above latitude <i>lat</i> maps to + convex lune with given <i>angle</i> at 90°E and 90°W + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + + </table> + + </table> + Retroazimuthal projections. At every point the angle between vertical + and a straight line to ‘Mecca’, latitude <i>lat0</i> on the prime meridian, + is the true bearing of Mecca. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>mecca</font></tt> <i>lat0</i> equally spaced vertical meridians<br> + <tt><font size=+1>homing</font></tt> <i>lat0</i> distances to Mecca are true + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Maps based on the spheroid. Of geodetic quality, these projections + do not make sense for tilted orientations. For descriptions, see + corresponding maps above. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>sp_mercator<br> + sp_albers</font></tt> <i>lat0 lat1<br> + </i> +</table> +<p><font size=+1><b>EXAMPLES </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>map perspective 1.025 −o 40.75 74<br> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + A view looking down on New York from 100 miles (0.025 of the 4000-mile + earth radius) up. The job can be done faster by limiting the map + so as not to ‘plot’ the invisible part of the world: <tt><font size=+1>map perspective + 1.025 −o 40.75 74 −l 20 60 30 100</font></tt>. A circular border can be forced + by adding option + <tt><font size=+1>−w 77.33</font></tt>. (Latitude 77.33° falls just inside a polar cap of opening + angle arccos(1/1.025) = 12.6804°.)<br> + + </table> + <tt><font size=+1>map mercator −o 49.25 −106 180<br> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + An ‘equatorial’ map of the earth centered on New York. The pole + of the map is placed 90° away (40.75+49.25=90) on the other side + of the earth. A 180° twist around the pole of the map arranges + that the ‘Prime Meridian’ of the map runs from the pole of the + map over the North Pole to New York instead of + down the back side of the earth. The same effect can be had from + <tt><font size=+1> map mercator −o 130.75 74<br> + </font></tt> + </table> + <tt><font size=+1>map albers 28 45 −l 20 50 60 130 −m states<br> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + A customary curved-latitude map of the United States.<br> + + </table> + <tt><font size=+1>map harrison 2 30 −l −90 90 120 240 −o 90 0 0<br> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + A fan view covering 60° on either side of the Date Line, as seen + from one earth radius above the North Pole gazing at the earth’s + limb, which is 30° off vertical. The <tt><font size=+1>−o</font></tt> option overrides the default + <tt><font size=+1>−o 90 0 180</font></tt>, which would rotate the scene to behind the observer.<br> + + </table> + +</table> +<p><font size=+1><b>FILES </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>/lib/map/[1−4]??</font></tt> World Data Bank II, for <tt><font size=+1>−f<br> + /lib/map/*</font></tt> maps for <tt><font size=+1>−m<br> + /lib/map/*.x</font></tt> map indexes<br> + <tt><font size=+1>mapd</font></tt> Map driver program<br> + +</table> +<p><font size=+1><b>SOURCE </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>/usr/local/plan9/src/cmd/map<br> + </font></tt> +</table> +<p><font size=+1><b>SEE ALSO </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <a href="../man7/map.html"><i>map</i>(7)</a>, <a href="../man1/plot.html"><i>plot</i>(1)</a><br> + +</table> +<p><font size=+1><b>DIAGNOSTICS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + ‘Map seems to be empty’--a coarse survey found zero extent within + the <tt><font size=+1>−l</font></tt> and <tt><font size=+1>−w</font></tt> bounds; for maps of limited extent the grid resolution, + <i>res</i>, or the limits may have to be refined.<br> + +</table> +<p><font size=+1><b>BUGS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Windows (option <tt><font size=+1>−w</font></tt>) cannot cross the Date Line. No borders appear + along edges arising from visibility limits. Segments that cross + a border are dropped, not clipped. Excessively large scale or + <tt><font size=+1>−d</font></tt> setting may cause long line segments to be dropped. <i>Map</i> tries + to draw grid lines dotted and <tt><font size=+1>−t</font></tt> tracks dot-dashed. As + very few plotting filters properly support curved textured lines, + these lines are likely to appear solid. The west-longitude-positive + convention betrays Yankee chauvinism. <i>Gilbert</i> should be a map + from sphere to sphere, independent of the mapping from sphere + to plane.<br> + +</table> + +<td width=20> +<tr height=20><td> +</table> +<!-- TRAILER --> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=15><td width=10><td><td width=10> +<tr><td><td> +<center> +<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a> +</center> +</table> +<!-- TRAILER --> +</body></html> |