What is the difference between a Bitmap and a vector image?
What you’re calling “bitmap” is technically called “raster”. It includes files, like JPG, BMP, GIF, TIF, and PNG are “raster” graphics. Each pixel of the graphic is mapped. That’s why you can’t make the picture bigger without it becoming all crappy: a bigger picture means more pixels, but the pixel data for a bigger picture is not there. The computer has to guess, and computers are bad at guessing. Vector graphics are different. Instead of saying, there is a red pixel at location x,y, they are based on geometry formulas. For example, if there was a circle, vector graphics stores the data pi * r ^ 2. Now, when you make the picture bigger, the computer just changes the value of the radius, r, of the circle, and viola! You get the same quality no matter how big you make your picture because the math never changes.