Update README

README.md

@@ -9,4 +9,10 @@ license: mit
 app_port: 8765
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# An interactive web app for visualizing geospatial data
+
+## Introduction
+
+- Web App: <https://giswqs-geospatial-dataviz.hf.space>
+- GitHub: <https://github.com/opengeos/geospatial-dataviz>
+- Hugging Face: <https://huggingface.co/spaces/giswqs/geospatial-dataviz>

pages/02_google_buildings.py

@@ -65,6 +65,8 @@ def add_widget(m, position="topright"):
 
     m.add_widget(country, position=position)
 
+    html = "Source: <a href='https://sites.research.google/open-buildings/' target='_blank'>Google Open Buildings</a>"
+    m.add_html(html, position='bottomright')
 
 class Map(leafmap.Map):
     def __init__(self, **kwargs):