2) I then had to create a buffer around the lakes of 15km using
                the Buffer function.  Once that was done I was able to overlay
                the 'citylimits' image and the 'lakebuffer15' image using image1
                + image2 (boolean + ) and then reclass once again to produce
                the boolean image 'citylakebool'
 

                                                                              lakebuffer15.rst
                                          
 

                                                                        citylakebool.rst