Using OpenRailwayMap on a geemap.foliumap map

[lcrisinger]

Hello,
I am creating an interactive map visualization for my research that I will eventually need to publish on my website. I've therefore switched from geemap to geemap.foliumap, so that I can eventually publish using streamlit. For starters, if this is the incorrect way of going about things, please advise on how better to do it.
Anyways, my current issue is that I am trying to add an OpenRailwayMap layer to my map, but it is not working. The following, using geemap, correctly adds the layer:

import geemap
import ee
from ipyleaflet import GeoJSON, Marker, MarkerCluster # need in later code

Map_rail = geemap.Map(center = (61.5, 100), zoom = 4)
Map_rail.add_layer('OpenRailwayMap')
Map_rail

However, when using import geemap.foliumap as geemap, I have been unable to add the layer:

import geemap.foliumap as geemap
import ee
from ipyleaflet import GeoJSON, Marker, MarkerCluster # need in later code

Map = geemap.Map(center = (61.5, 100), zoom = 4)
openrailwaymap = 'https://{switch:a,b,c}.tiles.openrailwaymap.org/standard/{zoom}/{x}/{y}.png'
Map.add_tile_layer(url = openrailwaymap, name = 'OpenRailwayMap', attribution = 'OpenRailwayMap')
Map.addLayerControl()
Map

Clearly I am doing something wrong. I would greatly appreciate any and all advice!

[giswqs]

Try this:

import geemap.foliumap as geemap
Map = geemap.Map(center=(61.5, 100), zoom=4)
url = url='https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png'
Map.add_tile_layer(url, name='OpenRailwayMap', attribution='OpenRailwayMap')
Map

[lcrisinger]

Try this:

import geemap.foliumap as geemap
Map = geemap.Map(center=(61.5, 100), zoom=4)
url = url='https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png'
Map.add_tile_layer(url, name='OpenRailwayMap', attribution='OpenRailwayMap')
Map

This solution worked, thank you!

I am having issues adding a marker cluster to this map, which seems to only be a problem with the geemap.foliumap. When using geemap I had no such issues.

Here is a sample of the dataset I am using: https://github.com/lcrisinger/mapping/blob/main/stations_sample.csv

import os
import pandas as pd
import geopandas as gpd
from shapely.geometry import Point
import geemap.foliumap as geemap
from folium import LayerControl
from folium.plugins import MarkerCluster
import json
from geemap import geojson_to_ee, ee_to_geojson


# Assuming stations_sample is downloaded from the github repo provided
# stations_sample_path = ''
stations_sample = pd.read_csv(
	stations_sample_path, 
	dtype = {'station_code': str, 'code_str': str}
)
geometry = [Point(xy) for xy in zip(stations_sample['lon'], stations_sample['lat'])]
geo_df = gpd.GeoDataFrame(stations_sample, geometry=geometry)
gdf_json = geo_df.to_json() # Convert gdf to geojson

# Print the formatted GeoJSON data
geojson_formatted = json.loads(gdf_json)
print(json.dumps(geojson_formatted, indent=2))

# Base map with railway lines
Map = geemap.Map(
        center=(61.5, 100), zoom=4 # center on Russia
    )
url = url='https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png'
Map.add_tile_layer(url, name='OpenRailwayMap', attribution='OpenRailwayMap')

marker_cluster = MarkerCluster(
    markers=[
        Marker(location=feature["geometry"]["coordinates"][::-1])
        for feature in geojson_formatted["features"]
    ],
    name="Markers",
)
Map.add_layer(marker_cluster) # Yields attribute error: Cannot add an object of type MarkerCluster to the map.

I also tried:

ee_markercluster = geojson_to_ee(geojson_formatted)
Map.addLayer(ee_markercluster, {}, "Stations")
LayerControl().add_to(Map)
Map

[giswqs]

Try Map.add_points_from_xy

https://geemap.org/foliumap/?h=add_points_from_xy#geemap.foliumap.Map.add_points_from_xy

[lcrisinger]

Thanks for the quick reply!

This crashes my notebook (both in VSCode and in a separate Jupyter notebook instance), even with the reduced sample size of ~115 points (the full dataset has >3000). In the regular geemap module, it ran the full dataset with no issues.

# Base map with railway lines
Map = geemap.Map(
        center=(61.5, 100), zoom=4 # center on Russia
    )
url = url='https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png'
Map.add_tile_layer(url, name='OpenRailwayMap', attribution='OpenRailwayMap')
Map.add_points_from_xy(
        data = stations_sample,
        x = 'lon', y = 'lat'
)
Map

[giswqs]

It seems the OpenRailwayMap tile layer causes the map to crash, not the marker cluster.

import geemap.foliumap as geemap
m = geemap.Map()
url='https://a.tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png'
# m.add_tile_layer(url, name='OpenRailwayMap', attribution='OpenRailwayMap')
url = "https://raw.githubusercontent.com/lcrisinger/mapping/main/stations_sample.csv"
m.add_points_from_xy(
        data = url,
        x = 'lon', y = 'lat',
)
m

[lcrisinger]

Flipping the order (OpenRailwayMap after the marker cluster) solved the issue. Thank you!