ENLARGING AND REDUCING MAP SIZE

The significance of the scale of any map is immediately recognised when particular is to be enlarge or reduce. A small-scale map can not possibly show and roads can only be shown in a very generalized way which means that these features can not be measured to scale. A small-scale map can be enlarged to show more details and conversely, a large-scale map can be reduced.

Nowadays, maps can be enlarged or reduce in a number of ways, be is graphic or instrumental. One common method of enlarging and reducing map is the square method.

How to Reduce or Enlarge a Maps by the square Method
First cover the original map with a network of a square and note on one its sides and the bottom line, the number of the squares in numerical order.

GRID SYSTEM
Using latitudes and longitudes on a world map to locate the position of any place is a common method. However, this method is not accurate when applied to the Malaysian Topographical Series simply because the scale employed in this series is comparatively larger. To overcome this, a system of a grid lines is introduced so that instead of using latitudes and longitudes, we use Grid Squares as lines of reference. Every sheet of the Malaysian Topographical Series is lined with grid lines spaced at regular intervals. Each small grid square is a 1,000 yard square. Therefore the area of each small grid square is 1,000 x 1,000 square yqrds.

Every tenth grid line is emphasized by heavy print so that large grid square are formed. Each big grid square is a 10,000 yard square and its area therefore 10,000 x 10,000 square yards.grid lines (whether horizontal or vertical) are numbered accordingly from a point of origin in the south-west. Hence, o the Malaysian Topographical Sheets, the horizontal grid lines show the distance north of the point of origin whereas the vertical grid interpretation, these horizontal lines are called northings and the vertical lines easthng.

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