[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-17。"],[[["\u003cp\u003eThe Maps JavaScript API offers a \u003ccode\u003evisualization\u003c/code\u003e library with a \u003ccode\u003eHeatmapLayer\u003c/code\u003e class for visualizing data intensity at geographical points.\u003c/p\u003e\n"],["\u003cp\u003eYou can find a practical example of using the \u003ccode\u003eHeatmapLayer\u003c/code\u003e in the earthquake mapping tutorial, which demonstrates plotting earthquake locations and intensity.\u003c/p\u003e\n"],["\u003cp\u003eTo utilize the \u003ccode\u003evisualization\u003c/code\u003e library's functionalities, load it separately using the \u003ccode\u003elibraries\u003c/code\u003e parameter in the Maps JavaScript API bootstrap URL, specifying \u003ccode\u003evisualization\u003c/code\u003e as the desired library.\u003c/p\u003e\n"]]],[],null,["Overview\n\nThe Maps JavaScript API uses libraries to provide supplemental\nfeatures. The `visualization` library includes the\n[`HeatmapLayer`](/maps/documentation/javascript/heatmaplayer) class, which you can use to visualize data\nintensity at geographical points.\n\nFor example, the [earthquake mapping tutorial](/maps/documentation/javascript/tutorials/earthquakes) uses the `HeatMapLayer`\nclass to plot earthquake locations and intensity, and walks you step by step\nthrough the code.\n\nUse the library\n\nThe visualization library is a self-contained library, separate from the main\nMaps JavaScript API code. To use the functionality contained\nwithin this library, you must first load it using the `libraries` parameter in\nthe Maps JavaScript API bootstrap URL:\n\n\n```html\n\u003cscript async\n src=\"https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&loading=async&libraries=visualization&callback=initMap\"\u003e\n\u003c/script\u003e\n```\n\n\u003cbr /\u003e"]]
