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| import folium | |
| import pandas as pd | |
| import streamlit as st | |
| import leafmap.foliumap as leafmap | |
| import folium.plugins as plugins | |
| 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) | |
| """ | |
| ) | |
| st.title("National Library of Scotland XYZ Layers") | |
| df = pd.read_csv("data/scotland_xyz.tsv", sep="\t") | |
| basemaps = leafmap.basemaps | |
| names = df["Name"].values.tolist() + list(basemaps.keys()) | |
| links = df["URL"].values.tolist() + list(basemaps.values()) | |
| col1, col2, col3, col4, col5, col6, col7 = st.columns([3, 3, 1, 1, 1, 1.5, 1.5]) | |
| with col1: | |
| left_name = st.selectbox( | |
| "Select the left layer", | |
| names, | |
| index=names.index("Great Britain - Bartholomew Half Inch, 1897-1907"), | |
| ) | |
| with col2: | |
| right_name = st.selectbox( | |
| "Select the right layer", | |
| names, | |
| index=names.index("HYBRID"), | |
| ) | |
| with col3: | |
| # lat = st.slider('Latitude', -90.0, 90.0, 55.68, step=0.01) | |
| lat = st.text_input("Latitude", " 55.68") | |
| with col4: | |
| # lon = st.slider('Longitude', -180.0, 180.0, -2.98, step=0.01) | |
| lon = st.text_input("Longitude", "-2.98") | |
| with col5: | |
| # zoom = st.slider('Zoom', 1, 24, 6, step=1) | |
| zoom = st.text_input("Zoom", "6") | |
| with col6: | |
| checkbox = st.checkbox("Add OS 25 inch") | |
| # with col7: | |
| with st.expander("Acknowledgements"): | |
| markdown = """ | |
| The map tile access is by kind arrangement of the National Library of Scotland on the understanding that re-use is for personal purposes. They host most of the map layers except these: | |
| - The Roy Maps are owned by the British Library. | |
| - The Great Britain – OS maps 1:25,000, 1937-61 and One Inch 7th series, 1955-61 are hosted by MapTiler. | |
| If you wish you use these layers within a website, or for a commercial or public purpose, please view the [National Library of Scotland Historic Maps Subscription API](https://maps.nls.uk/projects/subscription-api/) or contact them at maps@nls.uk. | |
| """ | |
| st.markdown(markdown, unsafe_allow_html=True) | |
| m = leafmap.Map( | |
| center=[float(lat), float(lon)], | |
| zoom=int(zoom), | |
| locate_control=True, | |
| draw_control=False, | |
| measure_control=False, | |
| ) | |
| measure = plugins.MeasureControl(position="bottomleft", active_color="orange") | |
| measure.add_to(m) | |
| if left_name in basemaps: | |
| left_layer = basemaps[left_name] | |
| else: | |
| left_layer = folium.TileLayer( | |
| tiles=links[names.index(left_name)], | |
| name=left_name, | |
| attr="National Library of Scotland", | |
| overlay=True, | |
| ) | |
| if right_name in basemaps: | |
| right_layer = basemaps[right_name] | |
| else: | |
| right_layer = folium.TileLayer( | |
| tiles=links[names.index(right_name)], | |
| name=right_name, | |
| attr="National Library of Scotland", | |
| overlay=True, | |
| ) | |
| if checkbox: | |
| for index, name in enumerate(names): | |
| if "OS 25 inch" in name: | |
| m.add_tile_layer( | |
| links[index], name, attribution="National Library of Scotland" | |
| ) | |
| m.split_map(left_layer, right_layer) | |
| m.to_streamlit(height=600) | |