What is a map?
The map is a scaled representation of the earth’s surface or part of the earth’s surface on the flat surface
Types of maps
There are two types of map
topographical map and statistical map
this is a type of map drawn to show both natural and artificial features.
Examples of natural features are hills, mountains, valleys, and rivers
Examples of artificial features are roads, railways, and buildings
Statistical or distribution map
This is a type of map that is drawn to show the distribution of data or information.
For example, the map of California shows the distribution of people
According to Scale size;
1) Large scale maps
Are those maps drawn to large scale size e.g. 1:10000
These maps gives a larger representation of small area, they are also more detailed (shows a lot of information). They represent areas like cities, towns and villages.
2) Medium scale maps
Are those maps drawn to medium scale size e.g. 1:100000
They show a moderate amount of details. They represent areas like districts, regions and countries.
3) Small scale maps
Are those maps drawn to small scale size e.g. 1:1000000
They give a small presentation of a large area; they show little content (little information) They represent areas like continents and the world.
Statement scale is the type of map scale expression in which scale is expressed in form of a written statement, for example, one centimeter on the map represents ten kilometers on the ground. This can also be expressed in short as 1cm represent 10km or 1cm to 10km.
The following are features of statement scale;
- The scale is expressed as a word statement.
- The scales bear specific units of measurement. The unit of measurement used in the map is smaller than the actual measurements on the ground, for example, 1cm represents 10km
- The word ”represent” should be used. do not use ”equivalent” or ”equal”. For example, do not say one centimeter on the map is equal to ten kilometers on the ground. This is because the statement is not true. instead, say one centimeter on the map represents ten kilometers on the ground.
- The map distance always carries the digit 1 while that of the ground may be less than 1, 1, or more than one.
A statement scale is simple to express. However, it may be difficult for users who are not familiar with the unit of measurement used in the scale. If the map is used or enlarged, the scale will not remain the same