1)Convert the verbal scale of 1cm= 45 km to a numerical scale.
Answers
Answer:
Map Scale, directions
Scale
Precise geometric relationship between a map and the region it portrays.
- One of the most important characteristics of a modern map.
- Most maps are greatly reduced in size compared to their subjects, so scale is a small fraction.
Definition: Ratio of the size of the map to its subject:
Scale = distance on a map / distance on the ground
Example:
- Two points on the ground are 1000 m apart.
- Represented on the map by points only 1 cm apart
- Calculate scale as follows:
- 1 cm represents 1000 m
- 1000 m = 100,000 cm
- so 1 cm represents 100,000 cm
- so scale = 1 cm / 100,000 cm = 1/100,000
- Scale is a fraction, expressed in 3 ways:
- Representative Fraction (RF), e.g. 1:100,000
- Verbal Scale 'One cm represents one km'
- Graphic Scale - a line labelled with the distance it represents.
Graphic scale remains accurate if a map is enlarged or reduced. Verbal and RF scales do not.
On a graphic scale, the intervals must be convenient round numbers.
Scale examples
example: ground distance = 5 km, map distance = 2 cm.
- STEP 1: - 2 cm represents 5 km - (write in full)
- STEP 2: - 1 cm represents 2.5 km - (divide so left side = 1)
- STEP 3: - 1 cm represents 250,000 cm - (convert to same units)
- STEP 4: - scale is 1 : 250,000 - (express as a representative fraction)
example: distance on map = 3.5 cm, map scale = 1:15,000
- what is the real distance?
- STEP 1: - 1 cm represents 15,000 cm - (express scale in words, same units as your measurement)
- STEP 2: - 3.5 cm represents (3.5 x 15,000) cm = 52500 cm - (multiply both sides by map distance)
- STEP 3: - 3.5 cm represents 525 m - (convert to more convenient units)
answer: 525 m
Scale (2)
Answer:
"in a verbal scale,when 1 cm equal to
53 km them it means that the 1 cm will be representing 53 km of the Total
surface of the earth on the map.
it is one of the 8 ways to get a hangout the map almost all the units are similar to each other
there is a bar on graphic scale and natural scale for representative fraction that is used to form the scale on the map