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