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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])
@st.cache_data
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)
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