103_split_control.ipynb

Kernel: Python 3

Creating a split-panel map

This notebook demonstrates how to add a split-panel map with geemap and folium. It also supports streamlit. Note that the ipyleaflet SplitControl does not support streamlit.

Uncomment the following line to install geemap if needed.

# !pip install geemap

import ee
import folium
import geemap.foliumap as geemap

The split-panel map requires two layers: left_layer and right_layer. The layer instance can be a string representing a basemap, or an HTTP URL to a Cloud Optimized GeoTIFF (COG), or a folium TileLayer instance.

Using basemaps

m = geemap.Map(height=500)
m.split_map(left_layer="TERRAIN", right_layer="OpenTopoMap")
m

Show available basemaps.

# geemap.basemaps.keys()

Using COG

m = geemap.Map(height=600, center=[39.4948, -108.5492], zoom=12)
url = "https://github.com/opengeos/data/releases/download/raster/Libya-2023-07-01.tif"
url2 = "https://github.com/opengeos/data/releases/download/raster/Libya-2023-09-13.tif"
m.split_map(url, url2)
m

Using folium TileLayer

m = geemap.Map(center=[40, -100], zoom=4)

url1 = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2001_Land_Cover_L48/wms?"
url2 = "https://www.mrlc.gov/geoserver/mrlc_display/NLCD_2019_Land_Cover_L48/wms?"

left_layer = folium.WmsTileLayer(
    url=url1,
    layers="NLCD_2001_Land_Cover_L48",
    name="NLCD 2001",
    attr="MRLC",
    fmt="image/png",
    transparent=True,
)
right_layer = folium.WmsTileLayer(
    url=url2,
    layers="NLCD_2019_Land_Cover_L48",
    name="NLCD 2019",
    attr="MRLC",
    fmt="image/png",
    transparent=True,
)

m.split_map(left_layer, right_layer)
m

Using Earth Engine layers

m = geemap.Map(center=[39.3322, -106.7349], zoom=10)

srtm = ee.Image("USGS/SRTMGL1_003")
hillshade = ee.Terrain.hillshade(srtm)

vis = {
    "min": 0,
    "max": 5000,
    "palette": ["006633", "E5FFCC", "662A00", "D8D8D8", "F5F5F5"],
}

left_layer = geemap.ee_tile_layer(hillshade, name="Hillshade")
right_layer = geemap.ee_tile_layer(srtm, vis, name="DEM")

m.split_map(left_layer, right_layer)
m