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2718 Topics

Hello I have seen several scripts use create an index called NGDR (and it has been defined slightly differently between scripts). What is NGDR? I can’t seem to find a reference for it. Thanks

4 months ago

SentinelHub User

posted in Sentinel Hub

How to add footprint parameter into ODATA API query?

I just read FAQ about OData API:https://scihub.copernicus.eu/twiki/do/view/SciHubUserGuide/ODataAPI And now I am able to make such querry: https://scihub.copernicus.eu/dhus/odata/v1/Products?$format=json&$filter=startswith(Name,'S2') and ContentDate/Start ge datetime'2018-08-25T00:00:00' and ContentDate/End le datetime'2018-08-26T00:00:00' But I still don’t understand how to add footprint search parameter into this query. Could you help me please? Add any point and polygon parameters in my query example.

4 months ago

SentinelHub User

posted in Sentinel Hub

NDVI Value differences

I am calculating NDVI from S2-L2A images downloaded from Copernicus Open Data using sentinelsat in QGIS(raster calculator) & following this tutorial (I saved xarray to tif for comparison). I observe that the values obtained are different from both the methods, as original band values also differ by around 1000, hence the mean also varies & there is significant difference among the two means obtained for my interest area. I used a recent image of year Nov’2022. The mean value obtained from sentinelsat images is low as compared to NDVI from the pystac method. (for same area of interest) I am also confused about the values for individual bands I am getting, are these values DN or reflectance, as per the documentation and values I think both are reflectance multiplied by 1000. The image shows comparison for the values for NIR band (Band 8) for both sources, as we can see both max & min values are different for both sources and also the value at a point is different by 1000 (whi

4 months ago

SentinelHub User

posted in Sentinel Hub

Processing level difference - SENSOR and ALBUM

in pleaides data what is the difference between the "album’ & “Sensor” in processing level data?

4 months ago

SentinelHub User

posted in Sentinel Hub

Downloading Sentinel2_L1C timeseries

Hi, I would appreciate if you let me know if it is possible to download Sentinel2_L1C timeseries clipped for an study area in format .SAFE freely? If yes what it is?

4 months ago

SentinelHub User

posted in Sentinel Hub

Calculate available rate limits per request

Hello Forum! How could I calculate resulting rate limits per request??? Somehow rate limits exceeded, nonetheless the dashboard says: 500 processing units per 1 minute. 70 000 processing units per 31 days. This is very inconvenient issue, which frustrated severely my workflow! Thanks for suggestions!

4 months ago

SentinelHub User

posted in Sentinel Hub

Questions about commercial data

Dea all, I’m new in this forum and I want ask to you a important information about Commercial Data. I dont know if I want download high resolution images, I must buy a mounth fee and only buy individual images in that mount. Best Regards

4 months ago

SentinelHub User

posted in Sentinel Hub

Plot sentinel1 image creates weird dots image

I have created in my confiduration sentinel 1 layer by inserting the following script in the costum sccript editor: return [VV,VH, 2 * VH, VV / VH / 100.0] ( like in the documentation + VH channel). I used wms_Request and get data and then plot the image but I got image with dots : bbox_size,bbox,bbox_coords_wgs84=get_bbox_from_shape(shapes,10) s1_request = WmsRequest( data_collection=DataCollection.SENTINEL1_IW, layer='TRUE-COLOR-S1-IW', bbox=bbox, time=('2020-11-01', '2021-01-10'), width=bbox_size[0], config=config ) s1_data = s1_request.get_data() plot_image(s1_data[-3]) I’m not sure why is this hapenning ans would love to understand it better and get help with hoe to solve it.

4 months ago

SentinelHub User

posted in Sentinel Hub

Process API: Access to inputMetadata in evaluatePixel?

Hi there 👋 I am using Processing API and a custom eval script here. So far so good. Q: Is there a way to access inputMetadata inside the evaluatePixel function? I need to get access to the from and to datetimes from dateFilter.timeRange for some calculation (compute delta datetime in days from the user provided to datetime to all scenes used)… I don’t want to use it in calculating outputMetadata but for a custom pixel calculation… 🤔 🤔

4 months ago

SentinelHub User

posted in Sentinel Hub

CRS for Sentinel Hub images

Hi there,Just creating my first few GIS images from Sentinel Hub. They look great but when I put them into QGIS they are about 1000 miles too far south. Which coordinate reference system should I be using for these? Or is there another setting that I should alter? (The images in question are of Burkina Faso)Thanks!

4 months ago

SentinelHub User

posted in Sentinel Hub

Matching Landsat and Sentinel-2 bands

This might be a “harmonization” question, but nonetheless it seems like for the most part when I compare NDVI values from Sentinel-2 and Landsat 8/9 from SH that the values mostly match, except that Landsat 8/9 values are slightly biased low. When I compare level-2 products (surface reflectance) directly from AWS buckets for both sources, Landsat is way different (NDVI values are much lower). Do you guys apply some harmonization processes to try to get them closer? Just curious why your values appear closer while the AWS bucket ones are not close. Thanks.

4 months ago

SentinelHub User

posted in Sentinel Hub

Evalscript to get an RGB image?

Hi, I want to get an RGB image for my co-ordinates using the API, I use the following evalscript for that: minVal = 0.0; let maxVal = 0.4; let viz = new HighlightCompressVisualizer(minVal, maxVal); function evaluatePixel(samples) { let val = [samples[0].B04, samples[0].B03, samples[0].B02]; return viz.processList(val); } function setup(ds) { setInputComponents([ds.B02, ds.B03, ds.B04]); setOutputComponentCount(3); } Which gives me following error: {"error":{"status":400,"reason":"Bad Request","message":"Script failed to return.","code":"RENDERER_EXCEPTION"}} I have made sure everything else is fine. I think there’s something wrong with the evalscript.

4 months ago

SentinelHub User

posted in Sentinel Hub

Request image with multipolygons

Hello everyone, I hope you’re all doing well. I’m currently working on sending a request that involves multiple polygons. However, I’m encountering an issue where there’s a red area appearing between the polygons, when visualizing the NDVI index Here’s my script : //VERSION=3 function setup() { return { input: ["B04", "B08", "SCL", "dataMask"], output: [ { id: "default", bands: 4 }, { id: "index", bands: 1, sampleType: "FLOAT32" }, { id: "eobrowserStats", bands: 2, sampleType: "FLOAT32" }, { id: "dataMask", bands: 1 }, ], }; } function evaluatePixel(samples) { let val = index(samples.B08, samples.B04); let imgVals = null; const indexVal = samples.dataMask === 1 ? val : NaN; if (val < -0.5) imgVals = [0.05, 0.05, 0.05, samples.dataMask]; else if (val < -0.2) imgVals = [0.75, 0.75, 0.75, samples.dataMask]; else if (val < -0.1) imgVals = [0.86, 0.86, 0.86, samples.dataMask]; else if (val < 0) imgVals = [0.92, 0.92, 0.

4 months ago

SentinelHub User

posted in Sentinel Hub

Pixel Is Points vs. Pixel Is Area

Hey all, I have a question about some specifics in a given image from SentinelHub. I generally get the image in a .tiff format and wonder in what rasterspace it is given. Normally there are two different given (PixelisPoints and PixelisArea) from which the ‘Area’ is default. In some cases this is found in the tiff.tags, but this seems not to be the case here. Is there a clear answer and if so, can I find some documentation about it? Some Infos about this is available at:https://svn.osgeo.org/metacrs/geotiff/trunk/geotiff/html/spec/geotiff2.5.html Thank you.

4 months ago

SentinelHub User

posted in Sentinel Hub

Cannot import name 'get_s2_pixel_cloud_detector' from 'eolearn.mask'

Hi, I am working on a project to detect plastics using Sentinel-2. I am trying to follow theA pipeline for detecting macro-plastics in coastal waters using Sentinel 2 data python download_features.py --features data/features.csv I get an error when I run. I get the following Error: Traceback (most recent call last): File “”, line 1, in File “c:\users\username\anaconda3\lib\multiprocessing\spawn.py”, line 116, in spawn_main exitcode = _main(fd, parent_sentinel) File “c:\users\username\anaconda3\lib\multiprocessing\spawn.py”, line 125, in _main prepare(preparation_data) File “c:\users\username\anaconda3\lib\multiprocessing\spawn.py”, line 236, in prepare _fixup_main_from_path(data[‘init_main_from_path’]) File “c:\users\username\anaconda3\lib\multiprocessing\spawn.py”, line 287, in _fixup_main_from_path main_content = runpy.run_path(main_path, File “c:\users\username\anaconda3\lib\runpy.py”, line 265, in run_path return _run_module_code(code, init_globals, run_name, File “c:\users\userna

4 months ago

SentinelHub User

posted in Sentinel Hub

Difference between Sentinel-2 L1C and L2A

Hello everyone. I periodically use the images in natural color for purposes of studying history (I verify where the vegetation was cut, plowed or burned to later be able to do field work). It is not clear to me what is the difference between the images of Sentinel-2 L1C and L2A since when I swap between one and the other I see them the same. Thank you so much.

4 months ago

SentinelHub User

posted in Sentinel Hub

Same problem as Sentinel-2 L2A products crops unpredictably''

Hi! I’m having a similar problem as this forum topic and, as suggested, I went to EO-Browser to see if my AOI is in the border of the tile.The AOI is not on the border of the tile and in EO-Browser you can see the image being cropped unpredictably. Furthermore, the crop is not the same every time.The image for 2021-10-28 is just for reference when the API works OK2021-10-20 cropped2021-10-28 normal2021-11-14 cropped2021-11-09 image not even intersecting AOI (only EO-Browser version)Best,

4 months ago

SentinelHub User

posted in Sentinel Hub

NDVI value to get the the % of the green area

Hello there We are using Eos explorer we are getting the NDVI for all area, we are looking to calculate those values based on the area of interest, the idea is to calculate the green area inside this area of interest is there any way we could get this direct from the platform, or do we have to do it outside the platform Thanks

4 months ago

SentinelHub User

posted in Sentinel Hub

Sentinel-hub field-delineation deployment

Hello, I would like to run the field-delineation project. While doing so, I’m getting into the following error where converting tiff files to eopatches: 2023-05-09 11:18:46,915 rasterio._filepath ERROR File-like object not found in virtual filesystem: b’29a650e4-51a0-43dc-9539-84777b3482ef/29a650e4-51a0-43dc-9539-84777b3482ef.hdr’ 2023-05-09 11:18:46,916 rasterio._env INFO GDAL signalled an error: err_no=4, msg=“`/vsipythonfilelike/29a650e4-51a0-43dc-9539-84777b3482ef/29a650e4-51a0-43dc-9539-84777b3482ef’ not recognized as a supported file format.” rokenProcessPool Traceback (most recent call last) Cell In[67], line 1 ----> 1 convert_tiff_to_eopatches(tiffs_to_eop_config) File ~/.local/lib/python3.10/site-packages/fd-1.0.0-py3.10.egg/fd/scripts/tiffs_to_eopatches.py:71, in convert_tiff_to_eopatches(config) 68 executor = EOExecutor(workflow, exec_args, save_logs=True, logs_folder=‘.’) 70 LOGGER.info(‘Execute conversion’) —> 71 executor.run(workers=co

4 months ago

SentinelHub User

posted in Sentinel Hub

Download ROI from tile stored on AWS

Is there any way to download small ROI from a sentinel-2 tile that is stored on AWS instead of downloading the whole tile and then cropping it?

4 months ago

SentinelHub User

posted in Sentinel Hub

Problem with Landsat5 specific dates data

I’m using the python API to download a batch of images and I get the following error: DownloadFailedException: Failed to download from: https://services-uswest2.sentinel-hub.com/api/v1/process with HTTPError: 500 Server Error: Internal Server Error for url: https://services-uswest2.sentinel-hub.com/api/v1/process Server response: “{“error”:{“status”:500,“reason”:“Internal Server Error”,“message”:“Illegal request to s3://usgs-landsat/collection02/level-2/standard/tm/2007/190/031/LT05_L2SP_190031_20070314_20200830_02_T2/LT05_L2SP_190031_20070314_20200830_02_T2_SR_B1.TIF. HTTP Status: ‘403’”,“code”:“RENDERER_EXCEPTION”}}” before calling the API I’m doing a search to see what the catalog has. and this date exists in the catalogue: datetime.datetime(2007, 3, 14, 9, 42, 9, 464000, tzinfo=tzutc()), a few other datapoints also have an issue. for example: DownloadFailedException: Failed to download from:https://services-uswest2.sentinel-hub.com/api/v1/process with HTTPError: 500 Server Err

4 months ago

SentinelHub User

posted in Sentinel Hub

Sentinel 2 2A bands every Wavelength data

Hi, I’m using the sentinel 2 2A bands and Sentinel-2 Bands | Sentinel-Hub custom scripts showed me that every band is tested on a certain Central Wavelength and has his own Bandwidth. For example for band 2: B02 (blue) Resolution = 10m/px Central Wavelength = 490nm Bandwidth = 65nm Correct me if I’m wrong, but does that mean band 2 is tested between the wavelengths of 425-555(-65<-490->+65)? If so, is it possible to also acquire every wavelength that is not the central, like wavelength 435 or 485 or even 445.5? Or is there a better script/way to acquire a lot of wavelengths measurements from Sentinel 2?

4 months ago

SentinelHub User

posted in Sentinel Hub

Integrating Sentinel Hub Images into the Google Maps API

I need to integrate the sentinel images, NDVI, in my application, in a Google Maps API. I saw the example in the playground, I used it inside my app and everything worked, I can really pull the information and everything works fine. But, I have this Sentinel Hub label in the middle of the map and I would like to get rid of it. Can anyone help me with this?

4 months ago

SentinelHub User

posted in Sentinel Hub

Saving cloud mask

Hi, I have gone through the sentinel2-cloud-detector-example in jupyter notebook. It has worked very well for my area of interest. But how do I export the resulting masks in vector or raster format? thanks

4 months ago

SentinelHub User

posted in Sentinel Hub

Clipping Downloaded data

I have download the data using SentinelHubRequest(). I got an array of 256 X 256 (though I have shared the exact geometry of my farm). I want to understand how sentinel hub process box v/s full geometry in processing API, also please help me understand is there any simple way to clip the 256X256 nd array? Thanks in Advance

4 months ago

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