Update app.py

app.py

@@ -191,21 +191,21 @@ def mask_to_polygons(mask, transform, target_class_id):
     return gdf
 
 
-def calculate_illegal_area(mining_gdf, wiup_gdf):
+def calculate_area(mining_gdf, wiup_gdf):
     # Ensure both are in same CRS
     mining_gdf = mining_gdf.to_crs(wiup_gdf.crs)
 
-    # Difference = parts of mining polygons outside WIUP
-    illegal_area_gdf = gpd.overlay(mining_gdf, wiup_gdf, how='difference')
+    # Same = parts of mining polygons 
+    area_gdf = gpd.overlay(mining_gdf, wiup_gdf, how='intersection')
 
     # Convert to metric CRS (e.g., UTM) to calculate area in m²
-    metric_crs = 'EPSG:32648'  # UTM zone for SE Asia (adjust based on location)
-    illegal_area_gdf = illegal_area_gdf.to_crs(metric_crs)
+    metric_crs = 'EPSG:4326'  # UTM zone for SE Asia (adjust based on location)
+    area_gdf = area_gdf.to_crs(metric_crs)
     
-    illegal_area_gdf['area_m2'] = illegal_area_gdf.geometry.area
-    total_illegal_area = illegal_area_gdf['area_m2'].sum()
+    area_gdf['area_m2'] = area_gdf.geometry.area
+    total_area = area_gdf['area_m2'].sum()
 
-    return total_illegal_area, illegal_area_gdf
+    return total_area, area_gdf
 
 # Streamlit App Title
 st.title("Satellite Mining Segmentation: SAR + Optic Image Inference")
@@ -378,9 +378,9 @@ if st.button("Run Inference"):
             st.success(f"WIUP CRS: {wiup_gdf.crs}")
             
             # Find area
-            non_mining_area, non_mining_area_gdf = calculate_illegal_area(non_mining_gdf, wiup_gdf)
-            mining_area, mining_area_gdf = calculate_illegal_area(mining_gdf, wiup_gdf)
-            beach_area, beach_area_gdf = calculate_illegal_area(beach_gdf, wiup_gdf)
+            non_mining_area, non_mining_area_gdf = calculate_area(non_mining_gdf, wiup_gdf)
+            mining_area, mining_area_gdf = calculate_area(mining_gdf, wiup_gdf)
+            beach_area, beach_area_gdf = calculate_area(beach_gdf, wiup_gdf)
             
             # Display in Streamlit
             st.success(f" Non Mining Area : {non_mining_area/1e6:.2f} sq. km")