Added WMS web app

app.py

@@ -1,6 +1,17 @@
 import streamlit as st
 from multiapp import MultiApp
-from apps import basemaps, heatmap, gee, gee_datasets, home, census, deck, housing, upload
+from apps import (
+    basemaps,
+    heatmap,
+    gee,
+    gee_datasets,
+    home,
+    census,
+    deck,
+    housing,
+    upload,
+    wms,
+)
 
 st.set_page_config(layout="wide")
 
@@ -16,6 +27,7 @@ apps.add_app("Upload Vector Data", upload.app)
 apps.add_app("Search Basemaps", basemaps.app)
 apps.add_app("Pydeck Gallery", deck.app)
 apps.add_app("Heatmaps", heatmap.app)
+apps.add_app("Add Web Map Service (WMS)", wms.app)
 apps.add_app("Google Earth Engine (GEE)", gee.app)
 apps.add_app("Awesome GEE Community Datasets", gee_datasets.app)
 

apps/wms.py

@@ -0,0 +1,47 @@
+import streamlit as st
+import leafmap.foliumap as leafmap
+
+
+def app():
+    st.title("Add Web Map Service (WMS)")
+    st.markdown(
+        """
+    This app is a demonstration of loading Web Map Service (WMS) layers. Simply enter the URL of the WMS service 
+    in the text box below and press Enter to retrieve the layers. Go to https://apps.nationalmap.gov/services to find 
+    some WMS URLs if needed.
+    """
+    )
+
+    row1_col1, row1_col2, _ = st.columns([2, 1, 0.5])
+    width = 800
+    height = 600
+    layers = None
+
+    with row1_col2:
+
+        esa_landcover = "https://services.terrascope.be/wms/v2"
+        url = st.text_input(
+            "Enter a WMS URL:", value="https://services.terrascope.be/wms/v2"
+        )
+        empty = st.empty()
+
+        if url:
+            options = leafmap.get_wms_layers(url)
+
+            default = None
+            if url == esa_landcover:
+                default = "WORLDCOVER_2020_MAP"
+            layers = empty.multiselect(
+                "Select WMS layers to add to the map:", options, default=default
+            )
+
+        with row1_col1:
+            m = leafmap.Map(center=(36.3, 0), zoom=2)
+
+            if layers is not None:
+                for layer in layers:
+                    m.add_wms_layer(
+                        url, layers=layer, name=layer, attribution=" ", transparent=True
+                    )
+
+            m.to_streamlit(width, height)