Grid
On a normal map or atlas they are vertical.
Lines of longitude.
nothing
On a Mercator map the Meridians (vertical lines of Latitude) are straight lines at right angles to the lines of Longitude.
A contour map. The lines are called contour lines
Grid lines
horizontal lines represent latitude and vertical lines represent longitude
a table formatted with horizontal lines is called
The horizontal lines are called latitudes and the vertical lines are called longitudes.
The horizontal lines are called latitudes and the vertical lines are called longitudes.
horizontal lines are lines which may be at the angle of 00,1800,3600.if vertical lines stand on horizontal lines it is in the angle of 900
grid
Orgin is the intersection of horizontal and vertical number lines.
gradient
A grid, or on orthogonal grid, to be more precise.
vertical lines run from top to bottom, horizontal lines run from left to right the difference between the two is 90 degrees if you place vertical lines next to horizontal lines.
Non-vertical lines could be slanted or horizontal.