This cache was created after I found Brentwood Mural. It is meant to be done old school. This means that Geochecker will not help you. GoogleEarth Street View will not help you. You simply have to visit the co-ordinates, use your power of observation, do some simple math, and trust in yourself that you got it all right!
The final co-ordinates are N 51 A.B, W114 C.D Solve the following equations to get your smiley:
WP1: (N51 05.167, W114 06.232) A = number of Canada Geese in the middle panel
WP2. (N51 05.358, W114 07.090) B = 319 x number of waterfall(s)....answer was 2 waterfalls that are gone now as they sadly have been repainted)
WP3. (N51 05.595, W114 07.711) C = 3 + number of painter(s) whose names start with M.
WP4. (N51 05.776, W114 08.159) D = 464 + number of eagle(s) in middle mural