streamlit_app.py

import os
import streamlit as st
import pandas as pd
import leafmap.foliumap as leafmap

st.set_page_config(layout="wide")

url = "https://open.gishub.org/maxar-open-data"
repo = "https://github.com/opengeos/maxar-open-data/blob/master/datasets"

os.environ["GOOGLE_MAPS_API_KEY"] = "API-KEY"
m = leafmap.Map()
m.add_basemap("SATELLITE")
m.add_basemap("ROADMAP")


@st.cache_data
def get_datasets():
    datasets = f"{url}/datasets.csv"
    df = pd.read_csv(datasets)
    return df


@st.cache_data
def get_catalogs(name):
    dataset = f"{url}/datasets/{name}.tsv"

    dataset_df = pd.read_csv(dataset, sep="\t")
    catalog_ids = dataset_df["catalog_id"].unique().tolist()
    return catalog_ids


st.title("Visualizing Maxar Open Data")

col1, col2 = st.columns([1.2, 3.8])

with col1:
    default = "Morocco-Earthquake-Sept-2023"
    datasets = get_datasets()["dataset"].tolist()
    dataset = st.selectbox("Select a dataset", datasets, index=datasets.index(default))
    catalog = st.selectbox(
        "Select a COG mosaic",
        get_catalogs(dataset),
        index=get_catalogs(dataset).index("10300500E4F91900"),
    )
    geojson = f"{url}/datasets/{dataset}.geojson"
    mosaic = f"{url}/datasets/{dataset}/{catalog}.json"
    tsv = f"{repo}/{dataset}/{catalog}.tsv"
    st.markdown(f"View metadata: [{catalog}.tsv]({tsv})")

    with st.expander("Python code snippets"):
        markdown = f"""
import leafmap.foliumap as leafmap
m = leafmap.Map()
geojson = '{geojson}'
mosaic = '{mosaic}'
m.add_geojson(geojson, layer_name='{dataset}', info_mode='on_click')
m.add_stac_layer(mosaic, name='{catalog}')
m
        """
        st.code(markdown)

    style = {"weight": 1, "fillOpacity": 0}
    m.add_geojson(geojson, layer_name=dataset, style=style, info_mode="on_click")
    m.add_stac_layer(mosaic, name=catalog)

    st.info("About")
    markdown = f"""
    - [Web App Source Code](https://github.com/opengeos/maxar-open-data/blob/master/streamlit_app.py)
    - [GitHub Repo](https://github.com/opengeos/maxar-open-data)
    - [Notebook Example](https://github.com/opengeos/maxar-open-data/blob/master/examples/maxar_open_data.ipynb)
    - [Maxar Open Data Program](https://www.maxar.com/open-data)
    - [Maxar Open Data on AWS](https://registry.opendata.aws/maxar-open-data/)
    - [Maxar Open Data on STAC Index](https://stacindex.org/catalogs/maxar-open-data-catalog-ard-format#/)
    - [Maxar Open Data on STAC Browser](https://radiantearth.github.io/stac-browser/#/external/maxar-opendata.s3.amazonaws.com/events/catalog.json?.language=en)
    - Contact: [Qiusheng Wu](https://github.com/giswqs)
    """
    st.markdown(markdown)

with col2:
    m.to_streamlit(height=780)