raw script added

planet_scope/max_ndvi/raw.js

@@ -0,0 +1,48 @@
+//VERSION=3
+
+//Basic initialization setup function
+function setup() {
+  return {
+	//List of all bands, that will be used in the script, either for visualization or for choosing best pixel
+    input: [{
+      bands: [
+         "Red",
+         "NIR"
+      ]
+    }],
+	//This can always be the same if one is doing RGB images
+    output: { bands: 3 },
+    mosaicking: "ORBIT"
+  }
+}
+
+/*
+In this function we limit the scenes, which are used for processing. 
+These are based also on input variables. 
+E.g. if one sets date "2017-03-01" ("TO date") and cloud coverage filter 30%, 
+all scenes older than 2017-03-01 with cloud coverage 30% will be checked against
+further conditions in this function (in this function it is currently limited to 3 months).
+The more scenes there are, longer it will take to process the data.
+After 60 seconds of processing, there will be a timeout.
+*/
+
+function preProcessScenes (collections) {
+    collections.scenes.orbits = collections.scenes.orbits.filter(function (orbit) {
+        var orbitDateFrom = new Date(orbit.dateFrom)
+        return orbitDateFrom.getTime() >= (collections.to.getTime()-3*31*24*3600*1000);
+    })
+    return collections
+}
+
+function calcNDVI(sample) {
+  var denom = sample.Red + sample.NIR;
+  return ((denom != 0) ? (sample.NIR - sample.Red) / denom : NaN);
+}
+function evaluatePixel(samples) {  
+  var max = 0;
+  for (var i= 0; i<samples.length;i++) {
+      var ndvi = calcNDVI(samples[i]);
+    max = ndvi > max ? ndvi:max;
+    return [max];
+  }
+}