Witch lines on longitude and latitude intersect in Illinois?

Answer 1

The question is asking for the geographic coordinates of points in Illinois.

Illinois is a big place. It extends about 3-1/2 degrees in longitude from east to west,

and more than 5-1/2 degrees in latitude from north to south. Every point in the state

has different "lat/long coordinates".

My house, in a near-north suburb of Chicago, sits at roughly 42.0361 degrees north latitude,

87.7211 west longitude.

Those numbers are rounded to 4 decimal places, and that narrows it down to a

point within about 2-1/2 miles of my house. But it's easy to measure lat. and long.

with 100 times better precision than that, with any of the popular consumer-grade

GPS units.

If you have accurate and precise latitude and longitude of a place, you can stick a

pencil point in the ground within an inch of that exact place, anywhere on earth.