So we tried the old way of injecting the script in the URL. This do not work, and we have some difficult to understand errors like “<![CDATA[ Out of retries ]]>” .
I also tried to generate image using script that worked in the past for sure. And they do not longer work.
And sometime, event Sentinel Playground temporal do not load at all, and I only have a webpage with the following message :
##
Error
The scripts itself
The script, which you have linked to in GitHub (I have removed the link in case it contains some proprietary information of yours, please add it back if not), does not have appropriate return.
For script to be visualized, it needs to either return 3-dimensional array (return [R,G,B] or 1-dimensional array (return [GRAY];).
Out of retries error
This error happened in the period, when Sentinel Hub system was under significant load and was (temporarily) only partially operational. You should not get these normally.
I hope this helps. Feel free to come up with follow-up questions.
Looking forward to see your submission.
We have now another question.
We throw errors to debug our code.
One of the question we had was the number of scenes we filter.
Here is our filtering code :
const filterScenes = (scenes, metadataInput, nbPastYears) => {
const filteredScenes = scenes.filter((scene) => scene.date.getMonth() === metadataInput.to.getMonth()
&& scene.date.getFullYear() >= metadataInput.to.getFullYear() - nbPastYears)
throw new Error(filteredScenes.length + ’ / ’ + scenes.length)
}
global.filterScenes = (scenes, metadataInput) => {
return utils.filterScenes(scenes, metadataInput, config.default.nbPastYears)
}
The problem we see is that the total number of scenes increase if we change the date of the request. But the number of filtered scene is always 4.
Our objective is to filter scenes to extract only the scenes of the same month (eg January) over of the last 4 years. And we are surprise to have only 4 scenes.
So this imply that in 4 months, we only have 4 scenes ?
For information, MAXCC=100
Did we miss something ?
There are too many bits of info missing to be able to provide valuable support.
Can you perhaps provide an example of the full request? With script encoded in the URL?
Do mask the INSTANCEID and do remove the bits of the custom script, which might have some IPR value for you.
Huh, that script is so complicated that I cannot figure it out, what is happening.
I can only provide some general advice.
The basic skeleton for multi-temporal script is along the lines:
function setup (dss) {
// get all bands for display and analysis
setInputComponents([dss.B02,dss.B03,dss.B04,dss.B05,dss.B08,dss.B12]);
// return as RGB
setOutputComponentCount(3);
}
// you should reduce number of scenes you are processing as much as possible here to speed up the processing
function filterScenes (scenes, inputMetadata) {
return scenes.filter(function (scene) {
//filter scenes by date or order to only retrieve the ones needed in the evaluatePixel
}
function evaluatePixel(samples,scenes) {
//run through all scenes (for each pixel independently) and do the math with pixels values
}
If you change these three functions, they will probably not be called by our processing engine.
function filterScenes (scenes, inputMetadata) {
var nbPastYears=5;
var filteredScenes = [];
for (i=0;var i < scenes.length ; i++)
{
if (scene[i].date.getMonth()===metadataInput.to.getMonth() && scene[i].date.getFullYear() >= metadataInput.to.getFullYear() - nbPastYears)
{
filteredScenes.push(scene[i]);
}
}
return filteredScenes;
}
I feel that the nbPastYears variable in your function is undefined, which might explain why there are always only 4 scenes… only from the last year.
Perhaps your function would work simply if you put the variable in the function itself.
or 1-dimensional array (return [GRAY];).
We have corrected that