Question

Draw a diagram scale of rf 1/5000 by which you all to measure 800m find length of scale by this scale measure a distance of 525 m​

Answer 1

Answer:

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)