他们说图表是免费的： https://developers.google.com/chart/
但是地理图表确实需要地图ApiKey https://developers.google.com/chart/interactive/docs/gallery/geochart
从6月11日开始，他们将对谷歌地图API的使用收费。
那么它们是否免费？
似乎谷歌地理图表将不再免费(至少对于新用户(，因为即使在今天，我也收到一条错误消息
"地理编码服务：您已超出此 API 的每日请求配额。">
因此，地理图表的使用很重要(基础地理编码请求，因此可能也会加载javascript地图(。
我使用了以下代码：
<script type='text/javascript' src='https://www.gstatic.com/charts/loader.js'></script>
<script type='text/javascript'>
google.charts.load('current', {
'packages': ['geochart'], 'mapsApiKey': 'AIzaSyD-9tSrke72PouQMnMX-a7eZSW0jkFMBWY'
});
google.charts.setOnLoadCallback(drawMarkersMap);
function drawMarkersMap() {
var data = google.visualization.arrayToDataTable([
['City', 'Crime Index' ],
['Townsville, Australia', 63.36],
['Catania, Italy', 58.13],
['Saint Petersburg, Russia', 40.85],
['Algiers, Algeria', 51.24],
['Florence, Italy', 34.57],
['Milan, Italy', 44.97],
['Cairo, Egypt', 55.88],
['Florianopolis, Brazil', 57.94],
['Rosario, Argentina', 67.45],
['Naples, Italy', 58.30],
['Baku, Azerbaijan', 26.75],
['Guadalajara, Mexico', 54.20],
['Mexico City, Mexico', 66.57],
['Mangalore, India', 24.68],
['Rome, Italy', 54.34],
['Monterrey, Mexico', 50.56],
['Sarajevo, Bosnia And Herzegovina', 46.75],
['Turin, Italy', 56.31],
['Puebla, Mexico', 61.13],
['Puerto Vallarta, Mexico', 30.17],
['Belgrade, Serbia', 36.95],
['Tijuana, Mexico', 51.57],
['Osaka, Japan', 16.77],
['Sofia, Bulgaria', 44.59],
['Novi Sad, Serbia', 44.12],
['Singapore, Singapore', 16.23],
['Tokyo, Japan', 16.86],
['Rijeka, Croatia', 19.46],
['Busan, South Korea', 39.49],
['Almaty, Kazakhstan', 50.06],
['San Salvador, El Salvador', 73.53],
['Bratislava, Slovakia', 30.69],
['Dhaka, Bangladesh', 70.57],
['Zagreb, Croatia', 26.01],
['Riga, Latvia', 37.96],
['Tehran, Iran', 53.79],
['Liverpool, United Kingdom', 39.38],
['Limassol, Cyprus', 34.10],
['Abu Dhabi, United Arab Emirates', 13.63],
['Incheon, South Korea', 39.82],
['Nicosia, Cyprus', 27.87],
['Dubai, United Arab Emirates', 19.03],
['Brno, Czech Republic', 28.38],
['Panama City, Panama', 48.35],
['Seoul, South Korea', 35.16],
['Johor Bahru, Malaysia', 60.23],
['Prague, Czech Republic', 27.55],
['Kuala Lumpur, Malaysia', 68.23],
['Phnom Penh, Cambodia', 55.86],
['Kuching, Malaysia', 50.08],
['Aalborg, Denmark', 19.77],
['Copenhagen, Denmark', 21.57],
['Petaling Jaya, Malaysia', 65.08],
['Bali, Indonesia', 42.46],
['Ljubljana, Slovenia', 24.97],
['Colombo, Sri Lanka', 37.48],
['Kaunas, Lithuania', 45.83],
['Baghdad, Iraq', 53.30],
['Male, Maldives', 65.18],
['Addis Ababa, Ethiopia', 44.74],
['Beijing, China', 48.09],
['Cape Town, South Africa', 69.88],
['Durban, South Africa', 79.21],
['Vilnius, Lithuania', 30.90],
['Johannesburg, South Africa', 78.86],
['Barcelona, Spain', 45.84],
['Port Elizabeth, South Africa', 73.19],
['Pretoria, South Africa', 78.52],
['Lima, Peru', 68.44],
['Guangzhou, China', 50.58],
['Ulaanbaatar, Mongolia', 60.22],
['Luxembourg, Luxembourg', 28.64],
['Madrid, Spain', 41.38],
['Tallinn, Estonia', 20.46],
['Haifa, Israel', 42.32],
['Valencia, Spain', 42.15],
['Navi Mumbai, India', 36.33],
['Tel Aviv-Yafo, Israel', 40.37],
['Taipei, Taiwan', 19.46],
['San Juan, Puerto Rico', 68.91],
['Belo Horizonte, Brazil', 69.09],
['Bangkok, Thailand', 47.06],
['Skopje, Macedonia', 45.65],
['Shanghai, China', 43.97],
['Lund, Sweden', 40.11],
['Chiang Mai, Thailand', 28.71],
['Shenzhen, China', 52.61],
['Campinas, Brazil', 65.97],
['Basel, Switzerland', 16.01],
['Bern, Switzerland', 17.24],
['Amman, Jordan', 41.99],
['Geneva, Switzerland', 26.47],
['Phuket, Thailand', 58.46],
['Stockholm, Sweden', 47.58],
['Buenos Aires, Argentina', 62.41],
['Casablanca, Morocco', 54.32],
['San Jose, Costa Rica', 53.14],
['Lausanne, Switzerland', 30.52],
['Curitiba, Brazil', 65.37],
['Dar Es Salaam, Tanzania', 64.38],
['Lodz, Poland', 48.38],
['Montreal, Canada', 33.40],
['Fortaleza, Brazil', 80.61],
['Sao Paulo, Brazil', 72.41],
['Gothenburg, Sweden', 41.87],
['Valenzuela, Philippines', 25.21],
['Queretaro, Mexico', 35.06],
['Zurich, Switzerland', 19.01],
['Stavanger, Norway', 41.69],
['Ankara, Turkey', 43.44],
['Medellin, Colombia', 45.39],
['Bursa, Turkey', 19.73],
['Pattaya, Thailand', 55.42],
['Jerusalem, Israel', 40.93],
['Eskisehir, Turkey', 21.07],
['Malaga, Spain', 43.86],
['Istanbul, Turkey', 50.35],
['Porto Alegre, Brazil', 77.07],
['Izmir, Turkey', 26.97],
['Helsinki, Finland', 24.42],
['Chisinau, Moldova', 44.43],
['Recife, Brazil', 77.47],
['Rio De Janeiro, Brazil', 76.98],
['Salvador, Brazil', 78.75],
['Kochi, India', 35.43],
['Oulu, Finland', 26.39],
['Kathmandu, Nepal', 36.00],
['Hanoi, Vietnam', 51.55],
['Cordoba, Argentina', 50.77],
['Ho Chi Minh City, Vietnam', 56.50],
['Tampere, Finland', 23.15],
['Kuwait City, Kuwait', 35.86],
['Brampton, Canada', 54.66],
['Kharkiv, Ukraine', 46.77],
['Kiev, Ukraine', 47.90],
['Calgary, Canada', 32.40],
['Brasilia, Brazil', 64.44],
['Tunis, Tunisia', 36.72],
['Edmonton, Canada', 41.72],
['Port Of Spain, Trinidad And Tobago', 77.75],
['Hamilton, Canada', 44.99],
['Lyon, France', 38.31],
['Amsterdam, Netherlands', 33.67],
['Marseille, France', 64.35],
['Kelowna, Canada', 46.45],
['Halifax, Canada', 42.77],
['London, Canada', 46.96],
['Paris, France', 52.95],
['Mississauga, Canada', 45.97],
['Eindhoven, Netherlands', 24.32],
['Tromso, Norway', 52.48],
['Thessaloniki, Greece', 34.17],
['Ottawa, Canada', 23.95],
['Regina, Canada', 54.67],
['Toulouse, France', 41.85],
['Albuquerque, NM, United States', 68.06],
['Rotterdam, Netherlands', 36.36],
['Split, Croatia', 35.08],
['Saskatoon, Canada', 48.81],
['Windhoek, Namibia', 71.86],
['Atlanta, GA, United States', 64.99],
['Berlin, Germany', 40.97],
['Surrey, Canada', 63.27],
['Beirut, Lebanon', 49.91],
['Austin, TX, United States', 34.62],
['Auckland, New Zealand', 46.23],
['Toronto, Canada', 35.40],
['Bergen, Norway', 40.65],
['Vancouver, Canada', 35.96],
['Baltimore, MD, United States', 70.24],
['Bremen, Germany', 50.51],
['Christchurch, New Zealand', 38.13],
['Victoria, Canada', 32.92],
['Belfast, United Kingdom', 43.51],
['Winnipeg, Canada', 54.30],
['Boise, ID, United States', 31.45],
['Birmingham, United Kingdom', 52.84],
['Boston, MA, United States', 32.86],
['Cologne, Germany', 48.50],
['Kristiansand, Norway', 56.22],
['Charlotte, NC, United States', 41.56],
['Chicago, IL, United States', 65.37],
['Cincinnati, OH, United States', 48.24],
['Oslo, Norway', 44.01],
['Frankfurt, Germany', 45.54],
['Columbus, OH, United States', 45.10],
['Cardiff, United Kingdom', 38.78],
['Trondheim, Norway', 33.75],
['Dallas, TX, United States', 45.17],
['Denver, CO, United States', 37.78],
['Detroit, MI, United States', 71.43],
['Hamburg, Germany', 51.11],
['Krakow (Cracow), Poland', 35.98],
['Wellington, New Zealand', 29.92],
['Gdansk, Poland', 41.45],
['Waterloo, Canada', 24.01],
['Santiago, Chile', 49.66],
['Nairobi, Kenya', 59.94],
['Edinburgh, United Kingdom', 31.40],
['Merida, Mexico', 21.48],
['Glasgow, United Kingdom', 44.73],
['Honolulu, HI, United States', 41.73],
['Houston, TX, United States', 60.86],
['Tbilisi, Georgia', 19.81],
['Bogota, Colombia', 61.58],
['Muscat, Oman', 27.93],
['Poznan, Poland', 38.58],
['Munich, Germany', 17.45],
['Leeds, United Kingdom', 40.55],
['Kansas City, MO, United States', 60.12],
['Las Vegas, NV, United States', 55.17],
['Nuremberg, Germany', 39.00],
['The Hague (Den Haag), Netherlands', 29.59],
['London, United Kingdom', 47.75],
['Los Angeles, CA, United States', 48.43],
['Manchester, United Kingdom', 55.89],
['Newcastle Upon Tyne, United Kingdom', 38.30],
['Warsaw, Poland', 33.45],
['Miami, FL, United States', 54.19],
['Wroclaw, Poland', 41.25],
['Milwaukee, WI, United States', 63.34],
['Minneapolis, MN, United States', 49.12],
['Nottingham, United Kingdom', 40.37],
['New Orleans, LA, United States', 69.89],
['Lagos, Nigeria', 66.37],
['New York, NY, United States', 44.68],
['Dusseldorf, Germany', 29.63],
['Stuttgart, Germany', 27.70],
['Oakland, CA, United States', 66.29],
['Islamabad, Pakistan', 38.05],
['Chandigarh, India', 41.97],
['Orlando, FL, United States', 56.70],
['Karachi, Pakistan', 62.20],
['Athens, Greece', 49.56],
['Philadelphia, PA, United States', 58.53],
['Phoenix, AZ, United States', 56.73],
['Lahore, Pakistan', 46.90],
['Pittsburgh, PA, United States', 38.05],
['Hong Kong, Hong Kong', 20.90],
['Portland, OR, United States', 44.41],
['Lisbon, Portugal', 33.53],
['Richmond, VA, United States', 42.89],
['Porto, Portugal', 43.07],
['Riverside, CA, United States', 43.03],
['Tirana, Albania', 39.47],
['Rochester, NY, United States', 56.46],
['Sacramento, CA, United States', 47.81],
['Budapest, Hungary', 36.96],
['Saint Louis, MO, United States', 66.94],
['San Pedro Sula, Honduras', 85.18],
['Salt Lake City, UT, United States', 26.21],
['San Antonio, TX, United States', 47.33],
['Quebec City, Canada', 16.43],
['San Diego, CA, United States', 33.95],
['San Francisco, CA, United States', 49.16],
['San Jose, CA, United States', 46.61],
['Seattle, WA, United States', 43.71],
['Bucharest, Romania', 28.88],
['Ahmedabad, India', 40.49],
['Malmo, Sweden', 50.08],
['Tampa, FL, United States', 49.14],
['Cluj-Napoca, Romania', 23.03],
['Bangalore, India', 49.67],
['Washington, DC, United States', 57.50],
['Iasi, Romania', 26.69],
['Chennai, India', 42.12],
['Delhi, India', 59.34],
['Doha, Qatar', 14.48],
['Gurgaon, India', 64.99],
['Ad Dammam, Saudi Arabia', 52.01],
['Hyderabad, India', 37.99],
['Vienna, Austria', 22.62],
['Montevideo, Uruguay', 55.89],
['Kingston, Jamaica', 70.30],
['Tripoli, Libya', 59.60],
['Timisoara, Romania', 23.34],
['Kolkata, India', 49.71],
['Jeddah (Jiddah), Saudi Arabia', 48.81],
['Port Moresby, Papua New Guinea', 80.68],
['Mumbai, India', 44.52],
['Riyadh, Saudi Arabia', 33.35],
['Nagpur, India', 37.84],
['Reykjavik, Iceland', 21.78],
['Pune, India', 41.78],
['Baguio, Philippines', 40.57],
['Caracas, Venezuela', 82.55],
['Cancun, Mexico', 38.32],
['Harare, Zimbabwe', 52.43],
['Minsk, Belarus', 25.88],
['Surat, India', 41.57],
['Vadodara, India', 38.83],
['Cebu, Philippines', 44.28],
['Cork, Ireland', 29.19],
['Visakhapatnam, India', 40.62],
['Davao, Philippines', 28.79],
['Dublin, Ireland', 50.64],
['Iloilo, Philippines', 48.76],
['Moscow, Russia', 45.98],
['Penang, Malaysia', 45.00],
['Galway, Ireland', 28.06],
['Santo Domingo, Dominican Republic', 67.17],
['Limerick, Ireland', 39.10],
['Makati, Philippines', 39.56],
['Adelaide, Australia', 34.26],
['Damascus, Syria', 64.64],
['Yerevan, Armenia', 29.88],
['Manila, Philippines', 59.17],
['Jakarta, Indonesia', 53.14],
['Brisbane, Australia', 34.87],
['Cuenca, Ecuador', 38.41],
['Canberra, Australia', 21.18],
['Darwin, Australia', 63.08],
['Antwerp, Belgium', 38.37],
['Manama, Bahrain', 29.42],
['Gold Coast, Australia', 42.84],
['Lviv, Ukraine', 39.92],
['Novosibirsk, Russia', 47.15],
['Quezon City, Philippines', 60.30],
['Hobart, Australia', 34.15],
['Brussels, Belgium', 51.31],
['Melbourne, Australia', 42.36],
['Perth, Australia', 43.93],
['Gent, Belgium', 24.68],
['Bologna, Italy', 43.70],
['Sydney, Australia', 38.24],
['Alexandria, Egypt', 52.52],
['Quito, Ecuador', 53.54] ]);
var options = {
displayMode: 'markers',
colorAxis: {colors: ['green', 'blue']}
};
var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
chart.draw(data, options);
};