Air Quality API 常见问题解答
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API 是否有速率限制？
对于 Air Quality API，默认速率限制为每分钟 6,000 次查询。
什么是空气质量指数 (AQI)？
空气质量指数 (AQI) 是政府机构和其他提供商向公众传达空气污染程度或预测空气污染程度的指标。许多 AQI 都与健康影响有关，有些还针对每个 AQI 类别提供健康建议。
全球有许多不同的 AQI，每种 AQI 可能会使用不同的污染物、不同的污染物浓度阈值、不同的平均时间段进行计算，并以不同的比例、类别和颜色表示。
Air Quality API 包含 100 多个国家/地区的 70 多种空气质量指数。
什么是污染物？
空气污染物是指空气中可能对人体健康有害的颗粒物和气体，尤其是在浓度升高时。Air Quality API 可提供有关最常见污染物的信息，包括其浓度、排放源和影响。
计算结果是否准确？
用于计算空气质量指数的基础空气质量模型是一个多层模型，它使用各种类型的信息和数据作为输入。我们会通过将模型输出与政府监测站的数据进行比较来验证和监控模型的总体准确性（这些监测站的数据代表其精确位置的空气质量标准答案）。这是通过使用留一法运行持续交叉验证流程来实现的：从模型计算中排除一个传感器中的输入数据，然后将结果与实际站点的读数进行比较，以查看它们之间的匹配程度。
如需详细了解 Google 如何计算 AQI，请参阅 Google 上的空气质量数据。
空气质量数据多久更新一次？
空气质量热力图图块每小时刷新一次，与当前状况数据同步。更新通常会在整点后不久发布。
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-08-31。
[null,null,["最后更新时间 (UTC)：2025-08-31。"],[[["\u003cp\u003eThe Air Quality API has a default rate limit of 6,000 queries per minute.\u003c/p\u003e\n"],["\u003cp\u003eAn Air Quality Index (AQI) is a scale used to communicate air pollution levels and potential health effects, and the API supports over 70 AQIs in over 100 countries.\u003c/p\u003e\n"],["\u003cp\u003eThe API provides data on various air pollutants, including their concentration, sources, and effects.\u003c/p\u003e\n"],["\u003cp\u003eAir quality calculations are based on a multi-layered model and are validated against government monitoring stations for accuracy.\u003c/p\u003e\n"]]],[],null,["Is there a rate limit on the API?\n\nFor the Air Quality API, there is a default rate limit of 6,000\nqueries per minute.\n\nWhat is an Air Quality Index (AQI)?\n\nAn air quality index (AQI) is the scale by which government agencies and other\nproviders communicate to the public how polluted the air is or how polluted it\nis forecasted to be. Many AQIs are related to health effects and some have\nhealth recommendations for each AQI category.\n\nThere are many different AQIs globally, each may be calculated using different\npollutants, different pollutant concentration thresholds, different averaging\ntime periods and expressed on different scales, categories and colors.\n\nThe Air Quality API includes over 70 [air quality\nindexes](/maps/documentation/air-quality/laqis#supported_aqis) in over 100\n[countries](/maps/documentation/air-quality/laqis#supported_countries_and_their_relevant_aqis).\n\nWhat are pollutants?\n\nAir pollutants are particles and gasses in the air that can be harmful to\npeople's health, especially at elevated concentrations. The Air Quality API\nprovides information about the most common\n[pollutants](/maps/documentation/air-quality/pollutants#reported_pollutants),\ntheir concentration, emission sources and effects.\n\nAre the calculations accurate?\n\nThe underlying air quality model calculating the AQIs is a multi-layered model\nthat uses various types of information and data as input. The overall accuracy\nof the model is validated and monitored by comparing the model outputs to\ngovernment monitoring stations (these stations represent the ground truth\nregarding air quality at their precise location). This is performed by running a\ncontinuous cross-validation process using the Leave One Out Method: eliminating\nthe input data from one sensor from the model calculations and then comparing\nthe result to the actual station's reading to see how closely they match.\n\nFor more information about how Google calculates AQI, see [Air quality on\nGoogle](https://support.google.com/maps/answer/11270845).\n\nHow often is air quality data updated?\n\nAir Quality heatmap tiles are refreshed every hour in sync with current\nconditions data. Updates are typically published shortly after the hour."]]
