Managed optical constellations#
Managed SAR constellations#
EOReader implements sensor-agnostic features:
load: Load many band types:
stack: Stack all these type of bands
EOReader works mainly with:
EOReader allows you ta load and stack spectral bands, spetrcal indices, DEM and cloud bands agnostically from every handled optical constellation:
from eoreader.reader import Reader from eoreader.bands import * # Sentinel-2 path s2_path = "S2B_MSIL1C_20181126T022319_N0207_R103_T51PWM_20181126T050025.SAFE" # Create the reader object and open satellite data reader = Reader() # The reader will recognize the constellation from its product structure s2_prod = reader.open(s2_path) # Load some bands and index bands = s2_prod.load([NDVI, GREEN, CLOUDS]) # Create a stack with some bands stack = s2_prod.stack([RED, GREEN, BLUE], stack_path="s2_rgb_stack.tif")
In the same way, you can import and stack radar band from any handled SAR constellation, with the same pattern.
from eoreader.reader import Reader from eoreader.bands import * # Sentinel-1 GRD path s1_path = "S1B_EW_GRDM_1SDH_20200422T080459_20200422T080559_021254_028559_784D.zip" # Create the reader object and open satellite data reader = Reader() # The reader will recognize the constellation from its product structure s1_prod = reader.open(s1_path) # Load some bands and index bands = s1_prod.load([VV, VH]) # Create a stack with some bands stack = s1_prod.stack([VV_DSPK, VH_DSPK], stack_path="s1_stack.tif")
⚠️SNAP and SAR
SAR products need
ESA SNAPfree software to be orthorectified and calibrated. Ensure that you have the folder containing your
gptexecutable in your
PATH. If you are using SNAP 8.0, be sure to have your software up-to-date (SNAP version >= 8.0).
The API documentation can be found here.
Available notebooks provided as examples:
You can install EOReader via pip:
pip install eoreader
EOReader mainly relies on
On Windows and with pip, you may face installation issues due to GDAL. The well known workaround of installing from Gohlke’s wheels also applies here. Please look at the rasterio page to learn more about that.
You can install EOReader via conda:
conda config --env --set channel_priority strict conda install -c conda-forge eoreader
As one of the Copernicus Emergency Management Service Rapid Mapping and Risk and Recovery Mapping operators, SERTIT needs to deliver geoinformation (such as flood or fire delineation, landslides mapping, etc.) based on multiple EO constellations.
In rapid mapping, it is always important to have access to various sensor types, resolutions, and satellites. Indeed, SAR sensors are able to detect through clouds and during nighttime (which is particularly useful during flood and storm events), while optical sensors benefit from of multi spectral bands to better analyze and classify the crisis information.
As every minute counts in the production of geoinformation in an emergency mode, it seemed crucial to harmonize the ground on which are built our production tools, in order to make them as sensor-agnostic as possible.
This is why SERTIT decided to decouple the sensor handling from the extraction algorithms: the latter should be able to ingest semantic bands
VV) without worrying about how to load the specific sensor band or in what unit it is.
The assumption was made that all the spectral bands from optical sensors could be mapped between each other, in addition to the natural mapping between SAR bands.
Thus, thanks to EOReader, these tools are made independent to the constellation:
✅ the algorithm (and its developer) can focus on its core tasks (such as extraction) without taking into account the sensor characteristics (how to load a band, which band correspond to which band number, …)
✅ new sensor addition is effortless (if existing in EOReader) and requires no algorithm modification
✅ maintenance is simplified and the code quality is significantly improved
✅ testing is also simplified as the sensor-related parts are tested in EOReader library
However, keep in mind that the support of all the constellations used in CEMS is done in the best effort mode, especially for commercial data. Indeed, we may not have faced every product type, sensor mode or order configuration, so some details may be missing. If this happens to you, do not hesitate to make a PR or write an issue about that !
Mentionned in [Live+]SIG 2022 by ESRI France (in French):
Enrichir ArcgisPro grâce à des processus personnalisés d'observation de la Terre[ PDF ]
Mentioned in GeoPython 2023 -
FLORIA, a custom python pipeline for urban flood extraction from SAR multi-sensors, supported by U-Net convolutional network.
Mentioned in EGU 2023 -
Cutting-edge developments in rapid mapping
EOReader is licensed under Apache License v2.0. See LICENSE file for details.
EOReader is built on top of amazing libs, without which it couldn’t have been coded:
Product Factory, class creating products according to their names
SAR and Optical products
Band module containing:
SAR and Optical products
Environment variables that can change the processes
Additional keywords for EOReader used in
Utils: mostly getting directories relative to the project