在Python/Folium中绘制ERA5日风速-未找到图像

Question

我正在尝试绘制最新风速来自https://developers.google.com/earth-engine/datasets/catalog/ECMWF_ERA5_DAILY。它应该是一个"imagecollection"。当我运行下面的代码时，我得到了回溯"EEException: Image。可视化:需要参数"image"。"我添加了一个i_date只是为了确保我在一个合理的日期范围内搜索-以确保有可用的数据。

我可以知道我可能在哪里错了/我如何解决这个问题吗?非常感谢!

import ee
# Trigger the authentication flow.
ee.Authenticate()
# Initialize the library.
ee.Initialize()

wind = ee.ImageCollection('ECMWF/ERA5/DAILY')
i_date = '2022-04-28'
f_date = '2022-07-01'
wind= ee.ImageCollection('ECMWF/ERA5/DAILY')
import folium

def add_ee_layer(self, ee_image_object, vis_params, name):
"""Adds a method for displaying Earth Engine image tiles to folium map."""
map_id_dict = ee.Image(ee_image_object).getMapId(vis_params)
folium.raster_layers.TileLayer(
tiles=map_id_dict['tile_fetcher'].url_format,
attr='Map Data &copy; <a href="https://earthengine.google.com/">Google Earth Engine</a>',
name=name,
overlay=True,
control=True
).add_to(self)
# Add Earth Engine drawing method to folium.
folium.Map.add_ee_layer = add_ee_layer
wind_img=wind.select('u_component_of_wind_10m').filterDate(i_date,f_date).first()
# wind_img=wind_img.mean()
# Set visualization parameters for land surface temperature.
wind_vis_params = {
'min': 0, 'max': 40,
'palette': ['white', 'blue', 'green', 'yellow', 'orange', 'red']}
ee_tiles_names = ['Land Surface Temperature']
# Create a new map.
lat, lon = 45.77, 4.855
my_map = folium.Map(location=[lat, lon], zoom_start=5)
# Add layers to the map using a loop.
my_map.add_ee_layer(wind_img, wind_vis_params, 'Wind Speed')
my_map.add_child(folium.LayerControl())
folium.LayerControl(collapsed = False).add_to(my_map)
my_map.save("c:/data/weather.html")
import webbrowser
webbrowser.open("c:/data/weather.html")

Answer 1

这是愚蠢的我。我刚意识到数据集到2020年结束。下面是修改后的代码:

# -*- coding: utf-8 -*-
"""
Created on Fri Jul  1 10:04:39 2022
@author: xxx
"""
import ee
# Trigger the authentication flow.
ee.Authenticate()
# Initialize the library.
ee.Initialize()

wind = ee.ImageCollection('NOAA/GFS0P25')
i_date = '2022-06-30'
f_date = '2022-07-01'
# wind= ee.ImageCollection('ECMWF/ERA5/DAILY')
import folium

def add_ee_layer(self, ee_image_object, vis_params, name):
"""Adds a method for displaying Earth Engine image tiles to folium map."""
map_id_dict = ee.Image(ee_image_object).getMapId(vis_params)
folium.raster_layers.TileLayer(
tiles=map_id_dict['tile_fetcher'].url_format,
attr='Map Data &copy; <a href="https://earthengine.google.com/">Google Earth Engine</a>',
name=name,
overlay=True,
control=True
).add_to(self)
# Add Earth Engine drawing method to folium.
folium.Map.add_ee_layer = add_ee_layer
wind_img=wind.select('u_component_of_wind_10m_above_ground').filterDate(i_date,f_date).first()
# wind_img=wind_img.mean()
# Set visualization parameters for land surface temperature.
wind_vis_params = {
'min': 0, 'max': 40,
'palette': ['white', 'blue', 'green', 'yellow', 'orange', 'red']}
ee_tiles_names = ['Wind Speed']
# Create a new map.
lat, lon = 45.77, 4.855
my_map = folium.Map(location=[lat, lon], zoom_start=5)
# Add layers to the map using a loop.
my_map.add_ee_layer(wind_img, wind_vis_params, 'Wind Speed')
my_map.add_child(folium.LayerControl())
folium.LayerControl(collapsed = False).add_to(my_map)
my_map.save("c:/data/weather.html")
import webbrowser
webbrowser.open("c:/data/weather.html")