Topographic map Flashcards
type of map characterized by large-scale detail and quantitative representation of relief usually using contour lines in modern mapping, but historically using a variety of methods
topographic map
topographic maps are also called
contour maps or topo maps
Conventionally show topography, or land contours, by means of contour lines
topographic map
curves that connect contiguous points of the same altitude
contour lines
- contiguous points of same altitude
isohypse
used to show that a certain distance on the map represents the actual distance on the earth’s surface
scale
Represented using words (for example one inch = 400 miles) or using a graphic (a line graph)
scale
tells us what the map is all about, generally the biggest, darkest, and most noticeable text on your map
title
usually in one of the corners of the map and is often enclosed by a box
legend
explains the meaning of different sizes, shapes, and colors used in the map
legend
– used for defining and understanding the symbols found on the map
legend
things that stand for or represent real things on the earth’s surface
symbols
it can vary according to 2 categories: color and shape
symbols
shows which way is up on the map, nearly all maps are printed so that north is towards the top of the page
compass
sharp-pointed vees usually are in stream valleys, with the drainage channel passing through the point of the vee, with the vee pointing upstream
what rule
Rule of Vs
Consequence of erosion
stream valleys
closed loops are normally uphill on the inside and downhill on the outside, and the innermost loop is the highest area
what rule
rule of Os
If the roof instead represents a depression, some maps note this by short lines radiating from the inside of the loop called
hachures
close contours indicate a steep slope; distant contours a shallow slope
spacing of contours
Two or more contour lines merging indicates a _________
cliff
determine differences in elevation between two points, this must be known, and is given at the bottom of the map
contour interval
also present, and represent half the noted contour interval
dashed contour lines
gradient formula
change in field value/distance