#!/usr/local/bin/perl5 -w
$original_latitude = 41.803288;           # degrees
$original_longitude = (0.0 - 87.927486);  # degrees
$offset1 = ( 0.0 - 9.05357142857143);     # unspecified units or direction
$offset2 = ( 0.0 - 41.4642857142857);     # unspecified units or direction
$original_latitude_in_radians = ( 3.1415927 * $original_latitude / 180.0 );
$degrees_per_kilometer_of_latitude = ( 90.0 / 10000 );

print "$original_latitude -- original latitude\n";
print "$original_longitude -- original longitude\n";
print "$offset1 -- first offset\n";
print "$offset2 -- second offset\n";
print "$original_latitude_in_radians -- original latitude in radians\n";
print "$degrees_per_kilometer_of_latitude -- degrees per kilometer of latitude\n";
__END__
========== Map of Liz's house from bookmark link
P=41.7218058571429,-88.4274673754479,1
&A=1
&C=41.803288,-87.927486
&PR=1
&O=-9.05357142857143,-41.4642857142857
========== Same map recentered at the same center
P=41.7218058571429,-88.4274673754479,1
&A=1
&C=41.803288,-87.927486
&O=-9.05357142857143,-41.4642857142857
&S=True
&OA=1
&Pr=1
&MapSize=Large
&Map.x=214
&Map.y=169
========== Same map recentered instead with the recentering button
A=1
&C=41.803288,-87.927486
&O=0,0
&S=True
&OA=1
&P=41.7218058571429,-88.4274673754479,1
&Pr=1
&MapSize=Large
========== That latter map recentered at its own center as best possible
P=41.7218058571429,-88.4274673754479,1
&A=1
&C=41.803288,-87.927486
&O=0,0
&S=True
&OA=1
&Pr=1
&MapSize=Large
&Map.x=234
&Map.y=143