Convert pdf map images to vector files with map regions as shapes

Convert two pdf images of maps into vector files where each separate lot of land is a different object. One map has about 54 individual lots, and the other has about 36. The end use of the new files will be to put into PowerPoint, where I can apply different shading and add labels, arrows, etc. If there is an alternate way of using the files to shade lots, add other graphics, etc in PowerPoint (aside from vector files), please suggest this if is easier. I would like one bid for each map, and for the two together.