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Document $Latitude and $Longitude system variables.

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Dianne Skoll
2021-12-27 15:20:42 -05:00
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45
man/remind.1
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@@ -2156,11 +2156,35 @@ using twos-complement representation, this will be 2147483647.
The smallest representable \fBINT\fR. On a machine with 32-bit signed integers The smallest representable \fBINT\fR. On a machine with 32-bit signed integers
using twos-complement representation, this will be -2147483648. using twos-complement representation, this will be -2147483648.
.TP .TP
.B $LatDeg, $LatMin, $LatSec .B $Latitude (STRING type)
The latitude of your location, expressed as a string that is a floating-point
number. Because \fBRemind\fR does not have a native floating-point type,
we need to express it as a string. $Latitude can range from "-90.0" to
"90.0", with positive numbers representing points north of the equator
and negative numbers representing south.
.TP
.B $Longitude (STRING type)
The longitude of your location, expressed as a string that is a floating-point
number. Because \fBRemind\fR does not have a native floating-point type,
we need to express it as a string. $Longitude can range from "-180.0" to
"180.0", with positive numbers representing points east of the Greenwich
Meridian and negative numbers representing west.
.RS
.PP
For example, the coordinates of the Statue of Liberty in New York City
are approximately set by:
.nf
SET $Latitude "40.68933"
SET $Longitude "-74.04454"
.fi
.RE
.TP
.B $LatDeg, $LatMin, $LatSec (DEPRECATED)
These specify the latitude of your location. \fB$LatDeg\fR can These specify the latitude of your location. \fB$LatDeg\fR can
range from \-90 to 90, and the others from \-59 to 59. Northern latitudes range from \-90 to 90, and the others from \-59 to 59. Northern latitudes
are positive; southern ones are negative. For southern latitudes, all are positive; southern ones are negative. For southern latitudes, all
three components should be negative. three components should be negative. These three variables
are deprecated; you should use \fB$Latitude\fR instead.
.TP .TP
.B $Location (STRING type) .B $Location (STRING type)
This is a string specifying the name of your location. It is usually This is a string specifying the name of your location. It is usually
@@ -2168,23 +2192,30 @@ the name of your town or city. It can be set to whatever you like,
but good style indicates that it should be kept consistent with but good style indicates that it should be kept consistent with
the latitude and longitude system variables. the latitude and longitude system variables.
.TP .TP
.B $LongDeg, $LongMin, $LongSec .B $LongDeg, $LongMin, $LongSec (DEPRECATED)
These specify the longitude of your location. \fB$LongDeg\fR can These specify the longitude of your location. \fB$LongDeg\fR can
range from \-180 to 180. Western longitudes are positive; eastern range from \-180 to 180. Western longitudes are positive; eastern
ones are negative. Note that all three components should have the ones are negative. Note that all three components should have the
same sign: All positive for Western longitudes and all negative for same sign: All positive for western longitudes and all negative for
Eastern longitudes. Note that for historical reasons, the sign for eastern longitudes. Note that for historical reasons, the sign for
longitude is \fIdifferent\fR from the usual convention! If you find longitude is \fIdifferent\fR from the usual convention! If you find
the longitude of your location from a search engine, you will most the longitude of your location from a search engine, you will most
likely \fIneed to invert the sign to have it work correctly with likely \fIneed to invert the sign to have it work correctly with
Remind.\fR Remind.\fR These three variables are deprecated; you should use
\fB$Longitude\fR instead. Note also that \fB$Longitude\fR uses the
standard convention of negative for western longitudes and positive
for eastern ones.
.RS .RS
.PP .PP
The latitude and longitude information is required for the functions The latitude and longitude information is required for the functions
\fBsunrise()\fR and \fBsunset()\fR. Default values can be compiled \fBsunrise()\fR and \fBsunset()\fR. Default values can be compiled
into \fBRemind\fR, or you can \fBSET\fR the correct values at the into \fBRemind\fR, or you can \fBSET\fR the correct values at the
start of your reminder scripts. start of your reminder scripts.
.PP
Note that setting any of \fB$LongDec\fR, \fB$LongMin\fR and \fB$LongSec\fR
updates \fB$Longitude\fR correspondingly, and setting \fB$Longitude\fR
updates \fB$LongDeg\fR, \fB$LongMin\fR and \fB$LongSec\fR. Similar
rules apply to \fB$Latitude\fR, \fB$LatDeg\fR, \fB$LatMin\fR and \fB$LatSec\fR.
.RE .RE
.TP .TP
.B $MaxSatIter .B $MaxSatIter