handle Drive URLs correctly.

app.py

@@ -243,6 +243,15 @@ if file_url is None:
 
 if file_url is None:
     st.stop()
+
+if isinstance(file_url, str):
+    if file_url.startswith("https://drive.google.com/file/d/"):
+        ID = file_url.replace("https://drive.google.com/file/d/", "").split("/")[0]
+        file_url = f"https://drive.google.com/uc?id={ID}"
+    elif file_url.startswith("https://drive.google.com/open?id="):
+        ID = file_url.replace("https://drive.google.com/open?id=", "")
+        file_url = f"https://drive.google.com/uc?id={ID}"
+
 buffer = st.number_input("Buffer (m)", value=50, min_value=0, step=1)
 
 input_gdf = preprocess_gdf(gpd.read_file(file_url))