Maps do not have to be in color but color helps make interpretation easier.
An orthophosphate map is black and white while the toptgraphical map is in colour.
A relief map is a map designed to show land that isn't flat. It does so by showing various lines and colours to indicate height.
all the colors
It is a term used in height. On a map they use a variety of colours to show this. The colours do not stay the same. In fact, they get darker. e.g. green, yellow, orange, brown
a Map key is important because it helps you understand a symbol, label, or explanation. (thanks for supporting my answer please leave comment if you like it or not!:-)
It is a map that indicates temperatures in an area by using different colours and a key to indicate the temperatures the colours represent.
Mainly different colours.
It uses different colours, with a legend telling you which colours represent which height.
cartogram
blah blah blah
Blue - water Green - vegetationWhite - non-forested areaRed - land grid and important roadsBlack - small roads/trails, railways, boundaries etc
An orthophosphate map is black and white while the toptgraphical map is in colour.
Economic activity can be represented on a map by using various colours.
A relief map is a map designed to show land that isn't flat. It does so by showing various lines and colours to indicate height.
all the colors
A legend describes the meaning of lines, symbols and colours used on the map.
Country borders on a map are typically indicated by solid lines that separate one country from another. The names of the two countries are usually displayed on either side of the border line, making it easy to identify which countries are sharing the border. Additionally, different colors or shading may be used to differentiate the territories of the two countries.