| import os |
| import fiona |
| import geopandas as gpd |
| import streamlit as st |
|
|
| st.set_page_config(layout="wide") |
|
|
| 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) |
| """ |
| ) |
|
|
|
|
| |
| trusted_urls = [ |
| "https://github.com/giswqs/streamlit-geospatial/raw/master/data/us_states.geojson", |
| |
| ] |
|
|
|
|
| def is_trusted_url(url): |
| return url in trusted_urls |
|
|
|
|
| def save_uploaded_file(file_content, file_name): |
| """ |
| Save the uploaded file to a temporary directory |
| """ |
| import tempfile |
| import os |
| import uuid |
|
|
| _, file_extension = os.path.splitext(file_name) |
| file_id = str(uuid.uuid4()) |
| file_path = os.path.join(tempfile.gettempdir(), f"{file_id}{file_extension}") |
|
|
| with open(file_path, "wb") as file: |
| file.write(file_content.getbuffer()) |
|
|
| return file_path |
|
|
|
|
| def app(): |
|
|
| st.title("Upload Vector Data") |
|
|
| row1_col1, row1_col2 = st.columns([2, 1]) |
| width = 950 |
| height = 600 |
|
|
| with row1_col2: |
|
|
| backend = st.selectbox( |
| "Select a plotting backend", ["folium", "kepler.gl", "pydeck"], index=2 |
| ) |
|
|
| if backend == "folium": |
| import leafmap.foliumap as leafmap |
| elif backend == "kepler.gl": |
| import leafmap.kepler as leafmap |
| elif backend == "pydeck": |
| import leafmap.deck as leafmap |
|
|
| url = st.text_input( |
| "Enter a URL to a vector dataset", |
| "https://github.com/giswqs/streamlit-geospatial/raw/master/data/us_states.geojson", |
| ) |
|
|
| data = st.file_uploader( |
| "Upload a vector dataset", type=["geojson", "kml", "zip", "tab"] |
| ) |
|
|
| container = st.container() |
|
|
| if data or is_trusted_url(url): |
| if data: |
| file_path = save_uploaded_file(data, data.name) |
| layer_name = os.path.splitext(data.name)[0] |
| elif url: |
| file_path = url |
| layer_name = url.split("/")[-1].split(".")[0] |
|
|
| with row1_col1: |
| if file_path.lower().endswith(".kml"): |
| fiona.drvsupport.supported_drivers["KML"] = "rw" |
| gdf = gpd.read_file(file_path, driver="KML") |
| else: |
| gdf = gpd.read_file(file_path) |
| lon, lat = leafmap.gdf_centroid(gdf) |
| if backend == "pydeck": |
|
|
| column_names = gdf.columns.values.tolist() |
| random_column = None |
| with container: |
| random_color = st.checkbox("Apply random colors", True) |
| if random_color: |
| random_column = st.selectbox( |
| "Select a column to apply random colors", column_names |
| ) |
|
|
| m = leafmap.Map(center=(lat, lon)) |
| m.add_gdf(gdf, random_color_column=random_column) |
| st.pydeck_chart(m) |
|
|
| else: |
| m = leafmap.Map(center=(lat, lon), draw_export=True) |
| m.add_gdf(gdf, layer_name=layer_name) |
| |
| if backend == "folium": |
| m.zoom_to_gdf(gdf) |
| m.to_streamlit(width=width, height=height) |
|
|
| else: |
| with row1_col1: |
| m = leafmap.Map() |
| st.pydeck_chart(m) |
|
|
|
|
| app() |
|
|
