The colours are used to indicate various geographical features:
(i) Blue For showing water bodies.
(ii) Brown For showing mountains.
(iii) Yellow For showing plateau.

Intermediate directions North-East (NE), South-East (SE), South-West (SW) and North-West (NW) directions are called intermediate directions.
Cardinal directions The four major directions are called cardinal points, which are North, South, East and West.

Compass is an instrument that is used to find out main directions. The magnetic needle of the compass always points towards North-South direction and after knowing North, other directions can be identified easily.

Thematic map provides detailed information.

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The differences between sketch and plan are as follows:
Sketch It is a drawing based on memory and spot observation and not to scale. Sometimes, a rough sketch is required for an area to tell, where a particular area is located with respect to other places. Suppose you want to go to your friend's house and you don't know the way, then your friend may make a rough sketch to show the way to his house. Such a rough drawing is called a sketch map.
Plan: Plan of an area consists of details about length and breadth of a particular location. A plan is a drawing of small area on a large scale or in other words, a drawing drawn to scale is called plan.

A map is a representation or drawing of the earth's surface or a part of its area drawn on a flat surface according to a scale. There are different types of maps.
Some of them are as follows:
(i) Physical maps Maps showing natural features of the earth such as mountains, plateaus, plains, rivers, oceans etc are called physical or relief maps.
(ii) Political maps Maps showing cities, towns, villages and different countries and states of the world with their boundaries are called political maps.
(iii) Thematic maps Maps with specific information like road maps, rainfall maps, maps showing distribution of forests, industries etc are known as thematic maps.