app.py

from shiny import reactive
from shiny.express import input, ui
from shinywidgets import render_widget
import ee
import geemap 

geemap.ee_initialize(service_account=True)

city_centers = {
    "London": (51.5074, 0.1278),
    "Paris": (48.8566, 2.3522),
    "New York": (40.7128, -74.0060)
}

ui.input_select("center", "Center", choices=list(city_centers.keys()))

@render_widget
def map():
    return ipyl.Map(zoom=4)

@reactive.effect
def _():
    map.widget.center = city_centers[input.center()]