anchor.diff:  "Thomas A Edison",37.37,-118.987,CA
   "Mammoth Pool",37.329,-119.328,CA
   "Crane Valley",37.283,-119.517,CA
  -"Florence Lake (sce)",37.267,-118.967,CA
  -"Huntington Lake (usbr)",37.228,-119.221,CA
  +"Florence Lake",37.267,-118.967,CA
  +"Huntington Lake",37.228,-119.221,CA
   "Shaver Lake",37.145,-119.302,CA
   "Redinger Lake",37.145,-119.449,CA
   "Kerckhoff Dam",37.128,-119.524,CA
  
positive.code: "Boca Reservoir",39.383,-120.1,CA
  "Prosser Creek Reservoir",5622,39.3794,-120.1367,CA
  "Martis Creek Reservoir",39.327,-120.113,CA
  "Donner Lake",39.324,-120.233,CA
  "Lake Tahoe",39.181,-120.118,CA
  "Bridgeport Reservoir",38.325,-119.211,CA
  "Saddlebag Lake Reservoir",37.966,-119.272,CA
  
negative.code: "Upper Klamath",42.25,-121.815,CA
  Gerber,42.205,-121.13,CA
  "Iron Gate Reservoir",41.934,-122.436,CA
  "Clear Lk",41.927,-121.075,CA
  Dwinnell,41.541,-122.376,CA
  "Trinity Lake",40.801,-122.762,CA
  Lewiston,40.727,-122.793,CA
  "Lake Pillsbury",39.408,-122.958,CA
  "Lake Mendocino",39.199,-123.182,CA
  "Warm Springs",38.723,-123.01,CA
  "Soulajule Dam",38.153,-122.782,CA
  Nicasio,38.075,-122.757,CA
  Kent,37.997,-122.702,CA
  