Terrascope logo Proba-V MEP logo
This forum applies to Terrascope and Proba-V MEP. Please note that the forum is in English only.
Please log in using the link in the top menu to add new forum topics or comments.

Sentinel 2 image size

Hello everyone, I'm using Terrascope's jupyterlab in order to analyze the NDVI, NDBI and NDWI of a certain area over a time range. While analyzing the selected files, I noticed that while I selected the same AOI everywhere, I don't get the same image shape every time and the area observed in my image is not the same. To make my problem clearer, I have attached my code here: https://we.tl/t-jtpM5Is9W8   In the last cell, the different shapes of the considered files are printed. Do I have to isolate my AOI in another way, because I thought that using mask.msk only the aoi is considered?
Tags

Comments

Hi, this is expected because not all files have the same intersection with your AOI. When looking at the Sentinel-2 tiling grid, you will notice that several tile IDs (e.g. 31UES, 31UER, ...) intersect with your AOI; data from these tile IDs have a different intersection with your AOI, which results in different shapes. Regards, Dirk

Hello Dirk, thank you for the reply! I assume this is because the AOI is chosen so big? I found that I have to fiddle around a bit with the AOI in order to make all tile IDs intersect similarly

Hi, just a note: for this kind of problem, Terrascope offers the openEO API via openEO platform: https://openeo.cloud/ This generally solves all difficulties from trying to work directly with the complex file based products. Computing a timeseries for such indices is for instance a common use case.
blijf op de hoogte!
abonneer op onze nieuwsbrief
nieuwe perspectieven

Blijf op de hoogte!