'Lines' can be drawn at any eatitude, wherever you want them. They don't
even have to be evenly spaced. There is no standard, official, blessed set
of 'lines' that everybody must use.
Some maps and globes have 'lines' printed every 10 degrees, some have
them printed every 15 degrees, some have them printed every 30 degrees,
and some maps and globes don't have any lines printed on them at all. The
mapping software that I use can print lines on the map spaced 2 seconds
(0.000056 degree) apart if I want them. That's 324,000 'lines' of latitude
between the north and south poles, and 648,000 'lines' of longitude around
the equator. I've never needed them.
The land is relatively flat.
If the "contour interval" ... the elevation difference between lines ... is the same everywhere on the map, then the lines will be closer rogether on steep ground, and farther apart on flatter ground.
nearly flat
When contour lines are far apart, the slope is gentle or gradual. This indicates a relatively flat area where there is less change in elevation over a given distance. In contrast, closely spaced contour lines represent a steeper slope. Therefore, the spacing of contour lines provides insight into the steepness of the terrain.
Longitude lines are farthest apart at the equator, where the distance between them is about 69 miles (111 kilometers). As you move towards the poles, the longitude lines converge until they meet at the poles.
Contour lines that are far apart indicate gradual slopes, while contour lines that are close together indicate steep slopes.
On topographic maps, contour lines that are far apart indicate gentle slopes or gradual changes in elevation. The farther apart the contour lines, the flatter the terrain.
30 feet
100 yards from tryline to tryline.
They can be any distance apart
The land is relatively flat.
Contour lines that are far apart indicate a gentle slope. Because contour lines connect points with the same elevation, wide spacing indicates that the elevation is not changing drastically.
they have to be close together if they are far apart it means it is a flat area
It depends how far apart they are. It could be an infinite number.
When the contour lines are farther apart, this means that the slopes between them are gentle. On the other side, if the contour interval is smaller, the slope will be steep.
If the "contour interval" ... the elevation difference between lines ... is the same everywhere on the map, then the lines will be closer rogether on steep ground, and farther apart on flatter ground.
Closely spaced