Update README.md

README.md

@@ -33,10 +33,13 @@ This dataset provides flood detection data from satellite observations. Each geo
 
 ### What's in each tile?
 1. **Parquet file** (post-processing.parquet): Contains detailed observations with timestamps, locations, and environmental metrics
-2. **90-meter buffer geotiff** (90m-buffer.tif): Filtered flood extent with 90m safety buffer
+2. **80-meter buffer geotiff** (80m-buffer.tif): Filtered flood extent with 80m safety buffer
 3. **240-meter buffer geotiff** (240m-buffer.tif): Filtered flood extent with wider 240m safety buffer
 
-Note: for some tiles, there are no flood detections after the filtering is applied. In these cases, you will see a parquet file but no geotiffs.
+In the geotiffs:
+- **Value 2**: Pixels with flooding detected within the buffer distance (80m or 240m)
+- **Value 1**: Default exclusion layer representing areas with potential false positives (rough terrain or arid regions) or false negatives (urban areas)
+- **Value 0**: Areas without any flood detection and outside of our exclusion mask
 
 ## Finding Your Area of Interest
 1. Identify the coordinates of your area
@@ -104,10 +107,10 @@ recommended_filters = {
 ```
 
 ## Spatial Resolution
-Current data resolution (as of Oct 31, 2024):
-- ✅ Africa: 20-meter resolution
-- ✅ South America: 20-meter resolution
-- ⏳ Rest of world: 30-meter resolution
+Current data resolution (as of Feb 24,2025):
+- ✅ Global geotiffs: 20-meter resolution
+- ✅ Africa parquet files: 20-meter resolution
+- ⏳ Rest of world parquet files: 30-meter resolution
   - Update to 20-meter expected later this year
 
 ## Common Issues and Solutions