[align=left]Raster files
are made up of pixels and have an associated resolution that is usually expressed as the number of pixels per inch (expressed as dpi). Raster files are best at containing images that are made up of many different colors such as photographs or satellite images. They do not scale well and can appear blocky or jagged if increased in size.
Raster file exporters included with ArcMap are BMP, TIFF, JPEG, GIF, and PNG.
Vector files
are made up of mathematical descriptions of objects such as points, polygons, lines, and text. Vector files scale well since they do not have an associated resolution, and they will look the same at whatever size they are displayed. Vector files can also contain raster images, although the raster portions may not scale as well as the vector portions.
Vector file exporters included with ArcMap are EMF, EPS, PDF, AI, and SVG.
Vector files are generally smaller in size than a corresponding raster file. However, vector files without embedded fonts may not display with correct symbology or text on a machine that does not have the appropriate fonts installed[/align].
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