anchor.diff:  "Bear Valley Dam",34.242,-116.978,CA
   "Seven Oaks Dam",34.1178,-117.0978,CA
   "Villa Park",33.815,-117.832,CA
  -"Santiago Creek Res (irvine Lake)",33.785,-117.723,CA
  +"Santiago Creek Res",33.785,-117.723,CA
   "Railroad Canyon",33.675,-117.272,CA
   "Diamond Valley33.67",-117.066,CA
   "Vail Lake",33.496,-116.976,CA
  
positive.code: "Loveland Reservoir",32.779,-116.792,CA
  "Sweetwater Reservoir",32.692,-117.007,CA
  "Lower Otay",32.609,-116.927,CA
  "Shasta Dam (usbr)",40.718,-122.42,CA
  "Keswick Reservoir",40.601,-122.443,CA
  "Whiskeytown Dam (usbr)",40.598,-122.537,CA
  "Lake Mccloud",41.135,-122.074,CA
  "Iron Canyon",41.045,-121.981,CA
  "Lake Britton",41.022,-121.676,CA
  
negative.code: Relief,38.267,-119.733,CA
  "Beardsley Lake",38.203,-120.075,CA
  Strawberry,38.2,-119.983,CA
  "New Melones Reservoir",37.9481,-120.525,CA
  Tulloch,37.875,-120.603,CA
  "Cherry Lake",37.976,-119.913,CA
  