script.min.js

//VERSION=3
const PARAMS = {
  // Indices
  chlIndex: 'default',
  tssIndex: 'default',
  watermaskIndices: ['ndwi', 'hol'],
  // Limits
  chlMin: -0.005,
  chlMax: 0.05,
  tssMin: 0.075,
  tssMax: 0.185,
  waterMax: 0,
  cloudMax: 0.02,
  // Graphics
  foreground: 'default',
  foregroundOpacity: 1.0,
  background: 'default',
  backgroundOpacity: 1.0
};
function getIndices(t){return t?{natural:"[1.0*B07+1.4*B09-0.1*B14,1.1*B05+1.4*B06-0.2*B14,2.6*B04-B14*0.6]",chl:{flh:"B10-1.005*(B08+(B11-B08)*((0.681-0.665)/(0.708-0.665)))",rlh:"B11-B10-(B18-B10*((0.70875-0.68125)*1000.0))/((0.885-0.68125)*1000.0)",mci:"B11-((0.75375-0.70875)/(0.75375-0.68125))*B10-(1.0-(0.75375-0.70875)/(0.75375-0.68125))*B12"},tss:{b07:"B07",b11:"B11"},watermask:{ndwi:"(B06-B17)/(B06+B17)"}}:{natural:"[2.5*B04,2.5*B03,2.5*B02]",chl:{rlh:"B05-B04-(B07-B04*((0.705-0.665)*1000.0))/((0.783-0.665)*1000.0)",mci:"B05-((0.74-0.705)/(0.74-0.665))*B04-(1.0-(0.74-0.705)/(0.74-0.665))*B06"},tss:{b05:"B05"},watermask:{ndwi:"(B03-B08)/(B03+B08)"}}}function blend(t,n,e,r){return t.map((function(t,l){return t/100*e+n[l]/100*r}))}function getAlpha(t,n,e){return n+(e-n)/2<t?100:t<=n?0:t>=e?1:(t-n/2)/(e-n)*100}function getColors(t,n,e,r,l){let a,B;switch(t){case"chl":B=[[.0034,.0142,.163],[0,.416,.306],[.486,.98,0],[.9465,.8431,.1048],[1,0,0]],l&&(B=B.reverse(),e*=10,r/=10),a=colorBlend(n,[e,e+(r-e)/3,(e+r)/2,r-(r-e)/3,r],B);break;case"tss":B=[[.961,.871,.702],[.396,.263,.129]],a=colorBlend(n,[e,r],B)}return a}function isPureWater(t){return t?B06<.319&&B17<.166&&B06-B16>=.027&&B20-B21<.021:B03<.319&&B8A<.166&&B03-B07>=.027&&B09-B11<.021}function isCloud(t,n){const e=n?(B04-.175)/(.39-.175):(B02-.175)/(.39-.175);return e>1||e>0&&(B04-B06)/(B04+B06)>t}function getEval(s){return eval(s)}function isWater(t,n,e,r,l){if(0===n.length)return!0;{let a=!0;for(let B=0;B<n.length;B++){const u=n[B];if("ndwi"==u&&getEval(t.ndwi)<e){a=!1;break}if("hol"==u&&!isPureWater(l)){a=!1;break}if("bcy"==u&&isCloud(r,l)){a=!1;break}}return a}}function getBackground(t,n,e){let r,l=!1;const a=parseInt(100*e);return"default"===t||"natural"===t?(r=getEval(n),l=!0):r="black"===t?[0,0,0]:"white"===t?[1,1,1]:getStaticColor(t),l||1===e?r:blend(r,getEval(n),a,100-a)}function getForeground(t,n,e,r){let l;const a=parseInt(100*r);return l="natural"===t?getEval(e):getStaticColor(t),1===r?l:blend(l,n,a,100-a)}function getStaticColor(t){return[t[0]/255,t[1]/255,t[2]/255]}function getValue(t){let n,e,r,l,a;const B=t.chlIndex,u=t.tssIndex,o=t.background,s=t.foreground,c=t.foregroundOpacity,i="undefined"!=typeof B18,d=getIndices(i),f=getBackground(o,d.natural,t.backgroundOpacity);if(!isWater(d.watermask,t.watermaskIndices,t.waterMax,t.cloudMax,i))return f;if("default"!==s)return getForeground(s,f,d.natural,c);let g;if(null!==B){const r="default"===B?i?"flh":"mci":B;n=getEval(d.chl[r]),e=getColors("chl",n,t.chlMin,t.chlMax,i&&"flh"===r)}if(null!==u){const n="default"===u?i?"b11":"b05":u;r=getEval(d.tss[n]),l=getColors("tss",r,t.tssMin,t.tssMax),a=getAlpha(r,t.tssMin,t.tssMax)}g=null!==B&&null!==u?blend(l,e,a,100-a):null!==B&&null===u?e:null!==u&&null===B?blend(l,f,a,100-a):f;const h=parseInt(100*c);return 1===c?g:blend(g,f,h,100-h)}return getValue(PARAMS);