QUATER-1-PE-HEALTH-LC2- this is just a sample of unpacked lesson
Lesson 3 TLE 8 aquaculture.pptx
1. SCALE
• is a series or system of items of
increasing or decreasing size & Value.
• Ratio of distance on the map or
drawing & the distance in the ground
• The distance or measurement in the
map or drawing relative to the
ground.
2. MAP
- is a graphical
representation of the
ground drawn to scale.
3. Scale = Map or drawing distance (m)
Ground distance (m)
Example of a scale:
1:10m, 1:100m, 1:1000m, etc.
In the scale, the value of 1 represents
the ratio of map (in meter) to the
10m, 100m, or 1000m distance in the
ground.
4. Problem:
To determine the ration of
drawing/map with the
following ground
measurements of 125m long
and 80m wide is to do the ratio
and proportion formula:
5. 1m (map) = X(map)
1,000m (ground) 125m (ground)
1000m X = (1m) (125m)
X = 125m²
1,000m
X = 0.125m or 12.5cm
6. DIVISION AND MULTIPLICATION PROCESS
0.125m or 12.5cm
a.) 1 x 125m
1000
0.01 x 125m =
or
b.) 1 x 125m
1000 1000
= 0.125m or 12.5cm
7. GUIDES IN SCALING
1. To determine the measurement
of every line in the drawing, every
dimension or linear measurement
in the ground surface or field
should be divided by the given
scale.
8. Ex. Given scale is 1:1000m
125 m
80 m
Solution:
125m
1,000m
= 0.125m or 12.5cm
9. 2. If scale is changed to a
bigger value, the drawing
or figure of the same
dimensions of a lot
becomes smaller.
10. Ex. 1:1000m is changed to 1:2000m
Solution:
125m
2,000m
= 0.0625m or 6.25cm
11. 3. If scale is changed to a
smaller value from the
original (very first) scale, the
drawing or figure of the
original dimensions of a lot
becomes larger.
12. Ex. 1:1000m is changed to 1:100m
Solution:
125m
100m
= 1.25m or 125cm
13. 4.To check the correctness of the
work, multiply the line
measurement in the drawing (in
cm) by the given scale (also in cm)
divide by 100cm/m to determine
the linear measurement in the
ground surface.
