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| import ee | |
| import geemap.foliumap as geemap | |
| import geopandas as gpd | |
| import streamlit as st | |
| st.set_page_config(layout="wide") | |
| def ee_authenticate(token_name="EARTHENGINE_TOKEN"): | |
| geemap.ee_initialize(token_name=token_name) | |
| st.sidebar.info( | |
| """ | |
| - Web App URL: <https://streamlit.gishub.org> | |
| - GitHub repository: <https://github.com/giswqs/streamlit-geospatial> | |
| """ | |
| ) | |
| st.sidebar.title("Contact") | |
| st.sidebar.info( | |
| """ | |
| Qiusheng Wu at [wetlands.io](https://wetlands.io) | [GitHub](https://github.com/giswqs) | [Twitter](https://twitter.com/giswqs) | [YouTube](https://www.youtube.com/c/QiushengWu) | [LinkedIn](https://www.linkedin.com/in/qiushengwu) | |
| """ | |
| ) | |
| st.title("Global Building Footprints") | |
| col1, col2 = st.columns([8, 2]) | |
| def read_data(url): | |
| return gpd.read_file(url) | |
| countries = 'https://github.com/giswqs/geemap/raw/master/examples/data/countries.geojson' | |
| states = 'https://github.com/giswqs/geemap/raw/master/examples/data/us_states.json' | |
| countries_gdf = read_data(countries) | |
| states_gdf = read_data(states) | |
| country_names = countries_gdf['NAME'].values.tolist() | |
| country_names.remove('United States of America') | |
| country_names.append('USA') | |
| country_names.sort() | |
| country_names = [name.replace('.', '').replace(' ', '_') | |
| for name in country_names] | |
| state_names = states_gdf['name'].values.tolist() | |
| basemaps = list(geemap.basemaps) | |
| Map = geemap.Map() | |
| with col2: | |
| basemap = st.selectbox("Select a basemap", basemaps, | |
| index=basemaps.index('HYBRID')) | |
| Map.add_basemap(basemap) | |
| country = st.selectbox('Select a country', country_names, | |
| index=country_names.index('USA')) | |
| if country == 'USA': | |
| state = st.selectbox('Select a state', state_names, | |
| index=state_names.index('Florida')) | |
| layer_name = state | |
| try: | |
| fc = ee.FeatureCollection( | |
| f'projects/sat-io/open-datasets/MSBuildings/US/{state}') | |
| except: | |
| st.error('No data available for the selected state.') | |
| else: | |
| try: | |
| fc = ee.FeatureCollection( | |
| f'projects/sat-io/open-datasets/MSBuildings/{country}') | |
| except: | |
| st.error('No data available for the selected country.') | |
| layer_name = country | |
| color = st.color_picker('Select a color', '#FF5500') | |
| style = {'fillColor': '00000000', 'color': color} | |
| split = st.checkbox("Split-panel map") | |
| if split: | |
| left = geemap.ee_tile_layer(fc.style(**style), {}, 'Left') | |
| right = left | |
| Map.split_map(left, right) | |
| else: | |
| Map.addLayer(fc.style(**style), {}, layer_name) | |
| Map.centerObject(fc.first(), zoom=16) | |
| with st.expander("Data Sources"): | |
| st.info( | |
| """ | |
| [Microsoft Building Footprints](https://gee-community-catalog.org/projects/msbuildings/) | |
| """ | |
| ) | |
| with col1: | |
| Map.to_streamlit(height=1000) | |