Update README.md

Author: devalc

README.md

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-# ETPersistence-Data
+# ETPersistence-Data
+
+This repository contains the data used in the manuscript titled *"Persistence patterns in subfield-field crop water use to guide variable rate management."*
+
+## Contents of the Repository
+
+### 1. COG (Cloud Optimized GeoTIFFs)
+This folder contains three Cloud-Optimized GeoTIFFs (COGs):
+
+- **`persistence_new_RAT_lyr_magicValley_1986_2020_cog.tif`**  
+  Displays areas within the agricultural fields of Magic Valley that, relative to the field average, exhibit persistently different or similar crop water use.
+
+- **`difference_new_RAT_lyr_magicValley_1986_2020_cog.tif`**  
+  Shows all areas within the field that demonstrate persistently higher or lower than field-average crop water use.
+
+- **`difference_5percent_new_RAT_lyr_magicValley_1986_2020_cog.tif`**  
+  Highlights areas within the field that have persistently higher or lower than field-average crop water use by at least 5%.
+
+These layers can be visualized through the **Google Earth Engine application** at the following link:  
+🔗 [ET Persistence Viewer](https://chinmaydeval91.users.earthengine.app/view/etpersistence)
+
+### 2. Field_Boundaries
+This folder contains a layer that provides following information at each field in Magic Valley:
+- Dominant crop type  
+- Irrigation status  
+- Percent persistence  
+
+---
+
+## Citation  
+If you use this dataset, please cite the corresponding manuscript:  
+> **[Full citation will be added here once the manuscript is in print]**