Put simply, a contour is a line connecting points of equal elevations on the ground surface. The corresponding line on the map is called a contour line.
Alternatively, contour lines shown on a map are the traces of intersection of equally spaced level surfaces with the ground projected orthogonally to the map surface on a reduced scale.
It usually means that there are 50 metres in vertical height between each contour line shown on the map.
A contour line in art is an outline of a subject with no shading.
An Index Contour
The first contour line was created by Charles Hutton in 1771. He used contour lines to map a coal mine.
The size in the change of elevation from one contour line to another is called the contour interval. It represents the vertical distance between each contour line on a topographic map. The contour interval helps in understanding the slope and elevation changes of the terrain being represented.
it is a contour line of elevation Control index contour, or just index contour
It usually means that there are 50 metres in vertical height between each contour line shown on the map.
It means the slope is steeper
create a sentence for contour line
A contour line is a line defining elevation on a map.
A contour line in art is an outline of a subject with no shading.
Contour interval
It makes it easier to count the number of contour lines.
lower.
An Index Contour
the distance between mean sea level and any given contour line
An index contour is a thicker contour line that is labeled with the elevation of that contour. It usually appears every fifth contour line and helps to quickly identify elevation changes on a topographic map. Regular contour lines are thinner and connect points of equal elevation.