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--- | ||
id: marsh-ida | ||
name: "Salt Marsh Distribution from UNEP-WCMC (WILL ADD MORE INFO)" | ||
description: "ADD INFO" | ||
media: | ||
src: ::file ../stories/ian_goes_cover.jpg | ||
alt: Hurricane Ian as seen from space as it makes landfall with the state of Florida. NASA Earth Observatory image. | ||
author: | ||
name: Joshua Stevens, using GOES 16 imagery courtesy of NOAA and the National Environmental Satellite, Data, and Information Service (NESDIS) | ||
url: https://visibleearth.nasa.gov/images/150408/hurricane-ian-reaches-florida | ||
taxonomy: | ||
- name: Topics | ||
values: | ||
- Natural Disasters | ||
- Tropical | ||
- name: Source | ||
values: | ||
- Community Contributed | ||
layers: | ||
- id: marsh-ida | ||
stacCol: marsh-ida | ||
name: Salt Marsh | ||
type: raster | ||
description: "Salt Marsh Classification Pre-Ida (Southern Louisiana)" | ||
zoomExtent: | ||
- 0 | ||
- 20 | ||
sourceParams: | ||
colormap_name: binary-salt-marsh | ||
rescale: 0,1 # Assuming binary data (0 for non-salt marsh, 1 for salt marsh) | ||
legend: | ||
type: discrete | ||
items: | ||
- color: "#FF0000" # Red for Salt Marsh | ||
label: "Salt Marsh" | ||
- color: "#0000FF" # Blue for Non-Salt Marsh | ||
label: "Non-Salt Marsh" | ||
compare: | ||
datasetId: marsh-ida | ||
layerId: marsh-ida | ||
layers: | ||
- id: marsh-difference | ||
stacCol: marsh-difference | ||
name: Salt Marsh Difference | ||
type: raster | ||
description: "Difference in Salt Marshes Pre- and Post-Ida" | ||
initialDatetime: newest | ||
zoomExtent: | ||
- 0 | ||
- 20 | ||
sourceParams: | ||
colormap_name: binary-difference-salt-marsh | ||
rescale: -1,1 # -1 for loss, 0 for no change, 1 for gain | ||
legend: | ||
type: discrete | ||
items: | ||
- color: "#FF0000" # Red for Loss of Salt Marsh | ||
label: "Loss of Salt Marsh" | ||
- color: "#FFFFFF" # White for No Change | ||
label: "No Change" | ||
- color: "#0000FF" # Blue for Gain of Salt Marsh | ||
label: "Gain of Salt Marsh" | ||
--- | ||
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||
<Block type='wide'> | ||
<Prose> | ||
Harmonized Landsat Sentinel-2 (HLS) project from NASA is designed to integrate and harmonize data from multiple satellite sources, specifically the Operation Land Imager (OLI) on Landsat-8/9 and the Mult-Spectral Instrument (MSI) on Sentinel-2A/B satellites. This project aims to create a seamless surface reflectance record that is essential for various Earth Observation and monitoring tasks. | ||
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- **Temporal Extent:** Landsat-9 2021-10-31; Sentinel-2B 2017-07-06 | ||
- **Temporal Resolution:** ~3 days | ||
- **Spatial Extent:** Global with the exception of Antarctica | ||
- **Spatial Resolution:** 30 m x 30 m | ||
- **Data Units:** Surface Reflectance | ||
- **Data Type:** Research | ||
- **Data Latency:** 2 to 3 days | ||
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**Scientific Details:** | ||
HLS project incorporates several advanced scientific methodologies and technologies to harmonize data from the Landsat and Sentinel-2 satellites such as atmospheric correction, geographic co-registration and common gridding, bidirectional reflectance distribution normalization, and cloud-shadow masking. To calculate the Normalized Difference Vegetation Index (NDVI) from the HLS-2 Dataset, we utilize the red and near-infrared bands to assess vegetation health by applyin the formula NDVI = NIR - Red / NIR + Red, where 'NIR' refers to the near-infrared surface reflectance, and 'Red' denotes the red light surface reflectance, both harmonized from the Landsat and Sentinel satellites. | ||
</Prose> | ||
</Block> | ||
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<Block> | ||
<Prose> | ||
## Source Data Product Citation | ||
Claverie, M., Ju, J., Masek, J. G., Dungan, J. L., Vermote, E. F., Roger, J.-C., Skakun, S. V., & Justice, C. (2018). The Harmonized Landsat and Sentinel-2 surface reflectance data set. Remote Sensing of Environment, 219, 145-161. | ||
## Disclaimer | ||
All data provided in VEDA has been transformed from the original format (TIFF) into Cloud Optimized GeoTIFF ([COG](https://www.cogeo.org/)). Careful quality checks are used to ensure data transformation has been performed correctly. | ||
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## Key Publications | ||
Su Ye, John Rogan, Zhe Zhu, J. Ronald Eastman, A near-real-time approach for monitoring forest disturbance using Landsat time series: stochastic continuous change detection, Remote Sensing of Environment, Volume 252, 2021,112167, ISSN 0034-4257, (https://doi.org/10.1016/j.rse.2020.112167)[https://doi.org/10.1016/j.rse.2020.112167]. | ||
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Su Ye, Zhe Zhu, Guofeng Cao, Object-based continuous monitoring of land disturbances from dense Landsat time series, Remote Sensing of Environment, Volume 287, 2023, 113462, ISSN 0034-4257, (https://doi.org/10.1016/j.rse.2023.113462)[https://doi.org/10.1016/j.rse.2023.113462]. | ||
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### Other Relevant Publications | ||
Ye, S., Zhu, Z., & Suh, J. W. (2024). Leveraging past information and machine learning to accelerate land disturbance monitoring. Remote Sensing of Environment, 305, 114071. | ||
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## Acknowledgment | ||
This work has been supported by the USGS-NASA Landsat Science Team (LST) Program for Toward Near Real-time Monitoring and Characterization of Land Surface Change for the Conterminous US (140G0119C0008) | ||
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## License | ||
[Creative Commons Attribution 1.0 International](https://creativecommons.org/publicdomain/zero/1.0/legalcode) (CC BY 1.0) | ||
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</Prose> | ||
</Block> |