Not specifically on a map, but relating to land navigation, there are 3 types of North. Magnetic North - where the needle on a compass points. Grid North - the upward direction along the vertical gridlines on a map. True north- the northern direction by sight in a general area.
longitude and latitude
The imaginary lines that form the earths grid system are called latitude and longitude lines. Latitude lines go horizontally from east to west, where longitude lines go vertical from north to south.
grid lines are like calligraphy
There is no way to represent a round object on a flat surface without having distortion occur on a projection (map). Lines of longitude are curved because the Earth is asphere. When pinpointing a longitude line, your finger must curve around with the line itself as it curves
Books that have grid lines are called Graphing Books .
Purus North America sells these, called Ecoraster.
You do not add more grid lines, they are present for all displayed cells. But, you can turn the grid lines on or off. In Excel 2007, go to the Page Layout tab in the Sheet Options and turn the grid lines on or off by checking or unchecking the box in front of View (under Grid Lines).
A: Hartinger Ocean & B: Gridlines
Lines of latitude and the lines of longitude.
The lines on a map that form a grid system are called latitude and longitude lines. Latitude lines run horizontally and measure distance north and south of the equator, while longitude lines run vertically and measure distance east and west of the Prime Meridian.
The lines on a map that form a location-finding grid for any point on the earth are known as the geographic coordinates of latitude and longitude. Lines that arc around the globe along an east/west axis are the latitude lines, while the north/south arcing lines are longitude lines.