Latitude is related to South -> North If you move North, the latitude increases, if moving south it decreases.

Longitude is related to West -> East If you move East, the longitude increases until 180 and when you cross that datum limit it jumps to -180.

If you want to calculate a new coordinate by offset meters and direction, you find code here at stackoverflow.

To play with coordinates you can use http://www.geomidpoint.com/destination/ where you enter the coordinate and the offset in km, and the compass direction in degrees.

The calculation is done either using

1. complex spherical formulas for calculation of big distances > 1km - 10km or
2. using school mathematics (Polar coordinates (r, phi) once you have converted the lat, lon to cartesian space, e.g using a equirectangular projection. That is suitable only for smaller distances less than about 10km

with the help of other stack-overflow answer, I figured it out by myself without need of any API.

import math
latitude = 41.02633002010979
longitude = -111.94550019690477
offset = 1.0 / 1000.0;
latMax = latitude + offset
latMin = latitude - offset

lngOffset = offset * math.cos(latitude * math.pi / 180.0)
lngMax = longitude + lngOffset
lngMin = longitude - lngOffset

print("latMax = "+str(latMax), "latMin = "+str(latMin), "lngMax = "+str(lngMax), "lngMin = "+str(lngMin) )