Lesson 8 (topographic) Flashcards
Can be defined as the shape, configuration, roughness or
three-dimensional quality of Earth’s surface
Topography
are made to show this
information, together with the location of
artificial and natural features of the Earth,
including buildings, highways, streams,
lakes, forests and so on.
Topographic map
provide definite and
precise information regarding
elevation.
Spot heights
are series of short lines drawn in the direction of the slope.
Hachures
are drawn when not enough vertical control is available or when the surface is
too irregular or intricate contour.
Form lines
This is the most widely used method of quantitatively representing hills, mountains,
depressions, and ground surface
undulations on a
two-dimensional sheet of paper.
Contour
It is common use for aerial navigation charts and on small scale maps of the world.
Layer tinting
is an old method use to show relative elevations on maps.
Shading
Provide the most striking and realistic
expression of topography.
Relief
How much interval is expected in a 1:50,000 toposheet
20m interval
How much interval is expected in a 1:250,000 toposheet
50 m interval
The distance in elevation between the top of an object (a hill, tower, etc.) and its base.
Height
The difference in elevation between the highest point and the lowest in an area, or as shown on a topographic map.
Relief
the vertical distance between adjacent contour lines.
Contour interval
The vertical distance of a point above a reference plane. On a topographic map,
the plane is usually mean sea level.
Elevation
