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E-LEARNING7TH AUGUST 2012
Secondary 1 NA Geography
Instructions
You must view this powerpoint slides as a Slide Show.
You need to have your textbook with you and be prepared to highlight notes.
You need to log in to your LMS to access the questions.
For today’s session…
You will be recapping on what you learnt for atlas (page 35)
You will be recapping on how to read scale on a map.
You will be learning some basic map skills Eastings and northings Four-figure grid references Six-figure grid references Finding directions on a map
Question 1
You are to revise what you learnt for atlas on page 35 – 39 before you do it.
You may refer to the textbook while you’re doing the question.
TEXTBOOK PAGE 31
Recap on Scale
What is scale? (page 31)
The scale of a map shows the relationship between a length on a map and the
actual distance it represents on the Earth’s surface. (Paragraph 1, line 2)
The scale of a map shows the relationship between a length on a map and the
actual distance it represents on the Earth’s surface. (Paragraph 1, line 2)
Why do we need a scale when drawing a map?
Impossible for us to draw a map the same size as the
actual area.
Impossible for us to draw a map the same size as the
actual area.
Statement scaleStatement scale Line scaleLine scale
1 cm represents 1 km
How scale is shown on a map (page 31)
Large-scale mapLarge-scale map Small-scale mapSmall-scale map
Smaller area of Earth’s surface
More details
Larger area of Earth’s surface
Less details
Large-scale map VS Small-scale map
Small-scale map Large-scale map
TURN TO PAGE 45 OF YOUR TEXTBOOK
Chapter 5: Interpreting Topographical maps
As you are going through this, please highlight in your
textbook.
What is the definition of a topographical map?
Read the paragraph on page 45A topographical map is an accurate large-scale maps that gives details of the physical and human features in an area.
What are the uses of a topographical map?
You can find the answer on page 45
You use a topographical map to locate specific places, as well as to understand physical and human environment.
PAGE 46 OF YOUR TEXTBOOK
Eastings and Northings
Eastings VS Northings
Read paragraph 1 and 2 of page
46
Eastings VS NorthingsThe numbers here
are increasing towards North
direction, thus they are called
Northings.
The numbers here are increasing towards North
direction, thus they are called
Northings.
The numbers here are increasing towards East
direction, thus they are called Eastings.
The numbers here are increasing towards East
direction, thus they are called Eastings.
PAGE 46 OF YOUR TEXTBOOK
Four figure grid reference
What is four figure grid reference?
It is a set of four numbers that is made up of Northings and Eastings.
You should read EASTINGS FIRST followed by NORTHINGS.
Remember: E comes earlier than N.Eg. 0450 – 04 is the easting and 50 is the northing.
Four figure grid referenceStep 1: For example, I
want to identify the four figure grid
reference of this box.
Step 1: For example, I want to identify the
four figure grid reference of this box.
Four figure grid referenceStep 2: Draw a
cross at the BOTTOM LEFT CORNER of the
box.
Four figure grid reference
Read the corresponding grid lines. Should your answer be 0657 or
5706?
Read the corresponding grid lines. Should your answer be 0657 or
5706?
If you said 0657…
Give yourself a pat on your back. You’re right. IF you got this
wrong, please go back to slide 19 and
revise.
PAGE 47 OF YOUR TEXTBOOK
Six figure grid reference
What is six figure grid reference?
Six figure reference is like a more detailed version of a four figure grid reference.
As the name suggests, there are SIX numbers.
06 57Easting
Easting
Northing
Northing
The dotted boxes refers to
the special numbers that
give the EXACT position of the
feature you want to find in
the map.
Six figure grid referenceStep 1: For example, I
want to identify the six figure grid
reference of this box.
Step 1: For example, I want to identify the
six figure grid reference of this box.
Six figure grid reference
Step 2: Zoom into that
particular box
Step 2: Zoom into that
particular box
Six figure grid referenceYou would know from earlier that
the four figure grid
reference is 0657 . Now we need to find the 2
special numbers.
5
5
Step 1: Draw the mid points
as shown.
Step 1: Draw the mid points
as shown.
Step 2: Divide the grid
square into ten equal
parts.
Step 2: Divide the grid
square into ten equal
parts.
0 1 2 3 4
6 7 8 9 0
4
3
2
1
09
8
7
6
Six figure grid reference
5
50 1 2 3 4
6 7 8 9 0
4
3
2
1
09
8
7
6
Look at where your feature
coincides with the numbers you
have drawn. Estimate
somewhere in the middle of
the feature will do.
Look at where your feature
coincides with the numbers you
have drawn. Estimate
somewhere in the middle of
the feature will do.
063574
The six figure grid reference for Solis Lake
is…
Northing Easting
Special number that gives exact
location.
Special number that gives exact
location.
NOW YOU NEED TO ATTEMPT THE QUIZ ON THE LMS. YOU CAN REFER TO THE SLIDES
TO HELP YOU.
You are done!
