Hello,

My application collects some satellite data using your platform and sentinelhub-js library. I am able to download geotiff that gather 300 dates and 7 samples per pixel(in total: 300 * 7 = 2100 bands). Unfortunately decompression of the fetched geotiff lasts about 20 minutes(to perform decompression I use geotiff.js).

This takes definitely too much time. Is there any possibility to improve the way the data is retrieved in order to decrease decompression time?

Or maybe can I get a set of PNGs(each sample per each date as a separate PNG) or Buffer instead of geotiff and skip the whole process of decompression?

Perhaps there is a possibility to retrieve data as separate tiff pages?

Here is code for retrieve data from sentinel:

const rawDataLayer = new S2L2ALayer({

        instanceId: process.env.INSTANCE_ID,

        layerId: "TRUE-COLOR-S2L2A",

        evalscript: rawDataEvalscript(dates),

        mosaickingOrder: MosaickingOrder.LEAST_RECENT,

    });



const getMapParams =     {

        bbox,

        geometry,

        fromTime,

        toTime,

        transparent: true,

        resx: "10m",

        resy: "10m",

        format: "image/tiff",

    };

let imageBlob = (await rawDataLayer.getMap(getMapParams, ApiType.WMS)) as any as Buffer;



const BANDS_COUNT = 7;



export const rawDataEvalscript = (dates: Date[]) => {

    const datesCount = dates.length;

    const bandsCount = BANDS_COUNT * datesCount;



    return `

        //VERSION=3

    

        function setup() {

            return {

                input: ["B08", "B04", "B03", "B02", "dataMask", "SCL", "CLM"],

                output: [

                    {

                        id: "default",

                        bands: ${bandsCount},

                        sampleType: "UINT8"

                    },

                ],

                mosaicking: "ORBIT"

            };

        }

               

        const dates = [${dates.map((date) => `"${date.toISOString().split("T")[0]}"`).join(", ")}];

        

        function evaluatePixel(samples, scenes) {

            let data = []

            let length = samples.length

            for (let i = 0; i < samples.length; i++) {

                const date = scenes.orbits[i].dateFrom.split("T")[0]

                if (!dates.includes(date)) continue;

                data.push(samples[i].B08 * 255)

                data.push(samples[i].B04 * 255)

                data.push(samples[i].B03 * 255)

                data.push(samples[i].B02 * 255)

                data.push(samples[i].dataMask * 255)

    

                data.push(samples[i].SCL)

                data.push(samples[i].CLM)

                

            }

            

            return data

        }

    `;

};

And the code for extracting bands from tiff :
const rasters = await image.readRasters({ interleave: true }); - this line runs about 20 minutes

   const buffer = await new Response(imageBlob).arrayBuffer();

   const geotiff = await fromArrayBuffer(buffer);

   const image = await geotiff.getImage();

   const rasters = await image.readRasters({ interleave: true });