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Full catalog/marsh-difference
marsh-difference·dataset

Louisiana Salt Marsh Change From Hurricane Ida

Salt Marshes Difference for Pre and Post-Hurricane Ida
atmosphere NASA VEDA COG
In plain English

What it measures. Shows how salt marshes changed before versus after Hurricane Ida, mapping where coastal marsh was lost or altered.

How it's made. Derived from satellite vegetation and water indices, with marsh extent based on UNEP-WCMC classification.

How & where you'd use it. Helps assess storm damage to coastal wetlands that buffer communities from flooding.

What's measured

marshdifference

Coverage & cadence

  • Time span2021-08-23 → 2021-09-09
  • Spatial extent-90.85, 29.03, -90.06, 29.65
  • FormatsCOG

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

Salt marsh distribution from UNEP-WCMC classified based on NDVI and NDWI.

Get the data

veda_access.py
# NASA VEDA — open STAC API, anonymous (cloud-optimized GeoTIFFs)
from pystac_client import Client

cat = Client.open("https://openveda.cloud/api/stac")
col = cat.get_collection("marsh-difference")
items = list(col.get_items())          # browse the analysis-ready COGs
# open an asset with rioxarray:
# import rioxarray; da = rioxarray.open_rasterio(items[0].assets["cog_default"].href)
NASA VEDA is an open STAC catalog — browse and stream the cloud-optimized GeoTIFFs anonymously (no login).