Basic example doesn't work under foliumap plotting backend

[Gui-FernandesBR]

I simply tried to run the first example from the documentation (https://geemap.org/get-started/) but the final plot doesn't display the layers that I added to it.
However, I used the geemap.foliumap as the plotting backed, so I'm guessing this is the source of the problem.

When I changed to import geemap.geemap as geemap it started to work properly, so I'm moving my analysis to this backend for now, but I'd like to understand what I did wrong.

You can test it on Colab:

# -*- coding: utf-8 -*-
"""test_geemap.ipynb

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/1Xk_tQuSvGIjA5PXO6UDt_na70olioOOB
"""

!pip install geemap

import ee
import geemap.foliumap as geemap

lat, lon = -23.5546721, -46.7318389
my_map = geemap.Map(center=(lat, lon), zoom=15)
my_map

dem = ee.Image('USGS/SRTMGL1_003')
landcover = ee.Image("ESA/GLOBCOVER_L4_200901_200912_V2_3").select('landcover')
landsat7 = ee.Image('LANDSAT/LE7_TOA_5YEAR/1999_2003')
states = ee.FeatureCollection("TIGER/2018/States")

dem_vis = {
'min': 0,
'max': 4000,
'palette': ['006633', 'E5FFCC', '662A00', 'D8D8D8', 'F5F5F5']}

landsat_vis = {
    'min': 0,
    'max': 200,
    'bands': ['B4', 'B3', 'B2']
}

my_map.addLayer(dem, dem_vis, 'SRTM DEM', True, 0.5)
my_map.addLayer(landcover, {}, 'Land cover')
my_map.addLayer(ee_object=landsat7, vis_params=landsat_vis, name='Landsat 7', shown=True, opacity=1)
my_map.addLayer(states, {}, "US States")

my_map

my_map.__dict__

My map output was the following::

• Problem: the layers I added are not displayed
• No matter how many times I use the my_map.addControlLayer() feature, there's no way of switching to other layers rather than the OSM background

[giswqs]

Folium map is a one way street. You can need to add all layers before displaying the map. Once the map is displayed, no additional changes can be made to the map. In your example, you already display the map after creating it, all EE layers added later on would not be added to the map.

import ee
import geemap.foliumap as geemap

lat, lon = -23.5546721, -46.7318389
my_map = geemap.Map(center=(lat, lon), zoom=15)

dem = ee.Image('USGS/SRTMGL1_003')
landcover = ee.Image("ESA/GLOBCOVER_L4_200901_200912_V2_3").select('landcover')
landsat7 = ee.Image('LANDSAT/LE7_TOA_5YEAR/1999_2003')
states = ee.FeatureCollection("TIGER/2018/States")

dem_vis = {
'min': 0,
'max': 4000,
'palette': ['006633', 'E5FFCC', '662A00', 'D8D8D8', 'F5F5F5']}

landsat_vis = {
    'min': 0,
    'max': 200,
    'bands': ['B4', 'B3', 'B2']
}

my_map.addLayer(dem, dem_vis, 'SRTM DEM', True, 0.5)
my_map.addLayer(landcover, {}, 'Land cover')
my_map.addLayer(ee_object=landsat7, vis_params=landsat_vis, name='Landsat 7', shown=True, opacity=1)
my_map.addLayer(states, {}, "US States")

my_map