Perhaps you have ever seen a "family tree" diagram? That too the kind of Suburban Station Map filemumbai suburban rail mapsvg wikimedia commons with 753 X 768! A map of family relationships. You might have also seen various diagrams of the evolution of species - a much larger-scale kind of "family tree". They are maps that include time as well as space! You could also have seen "timelines", which are another kind of map of your time. Suburban Station Map filemumbai suburban rail mapsvg wikimedia commons with 753 X 768 do not have to relate just to spatial sizes!
Consider a dictionary, or the index of a book, or even the table of contents of a book. Those too are Suburban Station Map filemumbai suburban rail mapsvg wikimedia commons with 753 X 768. The book is an interesting circumstance because in a way it is a kind of reverse-lookup map, in that what have recently been arranged to slip the map! That is, what have been put into a chain determined by the map: the dictionary puts the words into alphabetic order for comfort of finding them. The Dewey Decimal Program used in libraries is kind of like that too: it assists Suburban Station Map filemumbai suburban rail mapsvg wikimedia commons with 753 X 768 where in the library the book you are interested in can be found.
In essence a map is a representation of relationships. But it is also true that rendering is itself a map, because if you acquired no way of "mapping" (relating) the representation to whatever the representation symbolizes you might not even realise that the rendering is a representation at all! Think of the paintings of Pablo Picasso or Salvador Dali: pictures of things or people, yet distorted in some way. Should you distorted a picture even more, eventually it could be so distorted that you could not tell searching at it what it was intended to be a picture of; what symbolizes. Your eyes and head have to be able to "map" the image to the thing to be able to recognise what thing the represents.