本文介绍等值面层的图表样式和各配置项的含义。
图表样式
等值面层是基础平面地图 3.0的子组件，适用于将已知的矢量点数据制作成栅格区域图进行大屏展示，例如使用等值面组件，实时显示全国的空气质量图，满足一些气象等行业的可视化需求。
配置面板
- 搜索配置：单击配置面板右上角的搜索配置，可在搜索配置面板中输入您需要搜索的配置项名称，快速定位到该配置项，系统支持模糊匹配。详情请参见搜索资产配置。
通用：设置等值面层的通用配置项。
参数
说明
可见级别
设置等值面层的可见级别值，在设定的级别范围内可见，级别之外不可见。
不透明度
等值面层的不透明度，范围为0~100，单位%。数值越大等值面层越不透明。
图形：设置等值面层的图形配置项。
参数
说明
区域颜色
设置等值面层中各区域的颜色，请参见颜色映射器使用说明，配置不同区域的映射颜色样式。
区域描边
等值面层内各区域描边线的颜色、粗细和线的类型样式。
说明线型支持数字输入，如：4,4，第一个数字表示实线长度，第二个数字表示间隔长度。
数据面板（默认模式）
插值点数据接口
配置字段说明
字段
说明
lng
插值点的经度。
lat
插值点的纬度。
value
插值点的value值。DataV会根据value值，结合配置面板中的区域颜色颜色映射渲染配置项，调整等值面层的颜色渲染效果。
裁剪边界数据接口
说明裁剪边界定义了需要渲染的插值点的范围。例如：定义整个带颜色区域的中国地图。请参见边界生成器功能介绍，获取自定义边界的数据。
| 配置项 | 说明 |
| 受控模式 | 打开开关，资产初始化状态下不请求数据，仅通过回调ID或蓝图编辑器配置的方法发起请求数据；关闭开关，可以使用自动更新请求数据。开关默认为关闭状态。 |
| 自动更新请求 | 选中后可以设置动态轮询，还可以手动输入轮询的时间频次。取消选中后则不会自动更新，需要手动刷新页面，或通过蓝图编辑器和回调ID事件来触发请求更新数据。 |
| 数据源 | 单击配置数据源，可在设置数据源面板中修改数据源类型和数据查询代码、预览数据源返回结果以及查看数据响应结果，详情请参见配置资产数据。 |
| 数据过滤器 | 数据过滤器提供数据结构转换、筛选和一些简单的计算功能。单击添加过滤器，可在设置数据源面板配置数据过滤器脚本，详情请参见过滤器使用说明。 |
| 数据响应结果 | 展示数据请求的响应结果。当数据源发生改变时，可单击右侧的 图标，实时查看数据响应结果。 |
案例演示
本案例以浙江省2022年全年的空气质量历史数据为例，通过地理小工具制作随机散点热力图，演示完整的操作过程。
登录DataV.GeoAtlas，选择范围选择器。
在地图面板选择浙江省，去勾选包含子区域后，单击GeoJSON后的
图标，下载浙江省的JSON文件。选择边界生成器，将上述下载的内容上传至地图面板。
在属性表面板中选中当前面，单击地图右侧的
图标，随机生成点。
选中所有生成的点后，在属性表面板右上角单击新增列。
新增
value字段，并设置相关属性后，单击执行。
在属性表面板单击导出GeoJSON，将所有点导出到本地保存。
在等值面层组件下的数据页签选择裁剪边界数据接口，将浙江省的json数据粘贴导入静态数据输入框中。
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{ "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": { "value": 432.250038058476 }, "geometry": { "type": "Point", "coordinates": [ 120.3071043126937, 30.460441881557443 ] }, "bbox": [ 120.3071043126937, 30.460441881557443, 120.3071043126937, 30.460441881557443 ], "id": 529301360001 }, { "type": "Feature", "properties": { "value": 135.12387873890944 }, "geometry": { "type": "Point", "coordinates": [ 118.41740701458201, 29.002590611880972 ] }, "bbox": [ 118.41740701458201, 29.002590611880972, 118.41740701458201, 29.002590611880972 ], "id": 529301360002 }, { "type": "Feature", "properties": { "value": 306.46871725244364 }, "geometry": { "type": "Point", "coordinates": [ 119.09847197952186, 29.259889828304882 ] }, "bbox": [ 119.09847197952186, 29.259889828304882, 119.09847197952186, 29.259889828304882 ], "id": 529301360003 }, { "type": "Feature", "properties": { "value": 489.5497852487411 }, "geometry": { "type": "Point", "coordinates": [ 119.23411068707917, 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"value": 333.44691139434286 }, "geometry": { "type": "Point", "coordinates": [ 119.93253140926961, 31.09929681088463 ] }, "bbox": [ 119.93253140926961, 31.09929681088463, 119.93253140926961, 31.09929681088463 ], "id": 529301360008 }, { "type": "Feature", "properties": { "value": 270.5209429333357 }, "geometry": { "type": "Point", "coordinates": [ 119.52740291007048, 29.22329329185737 ] }, "bbox": [ 119.52740291007048, 29.22329329185737, 119.52740291007048, 29.22329329185737 ], "id": 529301360009 }, { "type": "Feature", "properties": { "value": 372.7195858851968 }, "geometry": { "type": "Point", "coordinates": [ 120.4814173900912, 29.290027239600118 ] }, "bbox": [ 120.4814173900912, 29.290027239600118, 120.4814173900912, 29.290027239600118 ], "id": 529301360010 }, { "type": "Feature", "properties": { "value": 253.50649556560137 }, "geometry": { "type": "Point", "coordinates": [ 119.88924898994755, 30.097751882098216 ] }, "bbox": [ 119.88924898994755, 30.097751882098216, 119.88924898994755, 30.097751882098216 ], "id": 529301360011 }, { "type": "Feature", "properties": { "value": 273.4419089295744 }, "geometry": { "type": "Point", "coordinates": [ 118.99555844278662, 27.995849865453366 ] }, "bbox": [ 118.99555844278662, 27.995849865453366, 118.99555844278662, 27.995849865453366 ], "id": 529301360012 }, { "type": "Feature", "properties": { "value": 405.86291669718497 }, "geometry": { "type": "Point", "coordinates": [ 118.81042511510826, 28.000035995408265 ] }, "bbox": [ 118.81042511510826, 28.000035995408265, 118.81042511510826, 28.000035995408265 ], "id": 529301360013 }, { "type": "Feature", "properties": { "value": 267.9566434209207 }, "geometry": { "type": "Point", "coordinates": [ 120.27913761106339, 30.07879520721591 ] }, "bbox": [ 120.27913761106339, 30.07879520721591, 120.27913761106339, 30.07879520721591 ], "id": 529301360014 }, { "type": "Feature", "properties": { "value": 469.4513566325319 }, "geometry": { "type": "Point", "coordinates": [ 121.02733645375389, 30.50026065461512 ] }, "bbox": [ 121.02733645375389, 30.50026065461512, 121.02733645375389, 30.50026065461512 ], "id": 529301360015 }, { "type": "Feature", "properties": { "value": 292.2226043264644 }, "geometry": { "type": "Point", "coordinates": [ 119.44204953988442, 30.39552153518604 ] }, "bbox": [ 119.44204953988442, 30.39552153518604, 119.44204953988442, 30.39552153518604 ], "id": 529301360016 }, { "type": "Feature", "properties": { "value": 48.361440607266076 }, "geometry": { "type": "Point", "coordinates": [ 119.12549988738681, 28.078362615190844 ] }, "bbox": [ 119.12549988738681, 28.078362615190844, 119.12549988738681, 28.078362615190844 ], "id": 529301360017 }, { "type": "Feature", "properties": { "value": 470.06945642723366 }, "geometry": { "type": "Point", "coordinates": [ 119.67492431347199, 30.49064697271417 ] }, "bbox": [ 119.67492431347199, 30.49064697271417, 119.67492431347199, 30.49064697271417 ], "id": 529301360018 }, { "type": "Feature", "properties": { "value": 224.33703268934119 }, "geometry": { "type": "Point", "coordinates": [ 121.2971742405399, 28.2651056408659 ] }, "bbox": [ 121.2971742405399, 28.2651056408659, 121.2971742405399, 28.2651056408659 ], "id": 529301360019 } ] }勾选数据过滤器，设置过滤代码，从原始数据中过滤出只包含某一点的经纬度和value值。
return data.features.map(d => { const properties = d.properties; const coordinates = d.geometry.coordinates; return { lng: coordinates[0], lat: coordinates[1], value: d.properties.value }; });单击预览，即可查看对应自定义生成的等值面层大屏。
在画布中添加时间轴组件，修改静态数据符合本次案例。
[ { "name": "2022年1月", "value": 202201, "text": "1月份" }, { "name": "2022年2月", "value": 202202, "text": "2月份" }, { "name": "2022年3月", "value": 202203, "text": "3月份" }, { "name": "2022年4月", "value": 202204, "text": "4月份" }, { "name": "2022年5月", "value": 202205, "text": "5月份" }, { "name": "2022年6月", "value": 202206, "text": "6月份" }, { "name": "2022年7月", "value": 202207, "text": "7月份" }, { "name": "2022年8月", "value": 202208, "text": "8月份" }, { "name": "2022年9月", "value": 202209, "text": "9月份" }, { "name": "2022年10月", "value": 202210, "text": "10月份" }, { "name": "2022年11月", "value": 202211, "text": "11月份" }, { "name": "2022年12月", "value": 202212, "text": "12月份" } ]选择交互面板，启用交互事件。
返回等值面层组件，配置数据类型为数据库，并配置SQL语句。
SELECT :value as value
修改数据过滤器的代码，将全部点的静态数据作为参数传递。
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333.44691139434286 }, "geometry": { "type": "Point", "coordinates": [119.93253140926961, 31.09929681088463] }, "bbox": [119.93253140926961, 31.09929681088463, 119.93253140926961, 31.09929681088463], "id": 529301360008 }, { "type": "Feature", "properties": { "value": 270.5209429333357 }, "geometry": { "type": "Point", "coordinates": [119.52740291007048, 29.22329329185737] }, "bbox": [119.52740291007048, 29.22329329185737, 119.52740291007048, 29.22329329185737], "id": 529301360009 }, { "type": "Feature", "properties": { "value": 372.7195858851968 }, "geometry": { "type": "Point", "coordinates": [120.4814173900912, 29.290027239600118] }, "bbox": [120.4814173900912, 29.290027239600118, 120.4814173900912, 29.290027239600118], "id": 529301360010 }, { "type": "Feature", "properties": { "value": 253.50649556560137 }, "geometry": { "type": "Point", "coordinates": [119.88924898994755, 30.097751882098216] }, "bbox": [119.88924898994755, 30.097751882098216, 119.88924898994755, 30.097751882098216], "id": 529301360011 }, { "type": "Feature", "properties": { "value": 273.4419089295744 }, "geometry": { "type": "Point", "coordinates": [118.99555844278662, 27.995849865453366] }, "bbox": [118.99555844278662, 27.995849865453366, 118.99555844278662, 27.995849865453366], "id": 529301360012 }, { "type": "Feature", "properties": { "value": 405.86291669718497 }, "geometry": { "type": "Point", "coordinates": [118.81042511510826, 28.000035995408265] }, "bbox": [118.81042511510826, 28.000035995408265, 118.81042511510826, 28.000035995408265], "id": 529301360013 }, { "type": "Feature", "properties": { "value": 267.9566434209207 }, "geometry": { "type": "Point", "coordinates": [120.27913761106339, 30.07879520721591] }, "bbox": [120.27913761106339, 30.07879520721591, 120.27913761106339, 30.07879520721591], "id": 529301360014 }, { "type": "Feature", "properties": { "value": 469.4513566325319 }, "geometry": { "type": "Point", "coordinates": [121.02733645375389, 30.50026065461512] }, "bbox": [121.02733645375389, 30.50026065461512, 121.02733645375389, 30.50026065461512], "id": 529301360015 }, { "type": "Feature", "properties": { "value": 292.2226043264644 }, "geometry": { "type": "Point", "coordinates": [119.44204953988442, 30.39552153518604] }, "bbox": [119.44204953988442, 30.39552153518604, 119.44204953988442, 30.39552153518604], "id": 529301360016 }, { "type": "Feature", "properties": { "value": 48.361440607266076 }, "geometry": { "type": "Point", "coordinates": [119.12549988738681, 28.078362615190844] }, "bbox": [119.12549988738681, 28.078362615190844, 119.12549988738681, 28.078362615190844], "id": 529301360017 }, { "type": "Feature", "properties": { "value": 470.06945642723366 }, "geometry": { "type": "Point", "coordinates": [119.67492431347199, 30.49064697271417] }, "bbox": [119.67492431347199, 30.49064697271417, 119.67492431347199, 30.49064697271417], "id": 529301360018 }, { "type": "Feature", "properties": { "value": 224.33703268934119 }, "geometry": { "type": "Point", "coordinates": [121.2971742405399, 28.2651056408659] }, "bbox": [121.2971742405399, 28.2651056408659, 121.2971742405399, 28.2651056408659], "id": 529301360019 }] }; return data.features.map(d => { const properties = d.properties; const coordinates = d.geometry.coordinates; return { lng: coordinates[0], lat: coordinates[1], value: Math.random() * 100 }; });单击预览图标，查看最终结果。
数据面板（分析模式）
等值面层子组件BI分析数据配置面板中的详细操作说明，请参见BI分析模式数据面板功能介绍。
配置字段说明
字段 | 说明 |
| 插值点的经度。 |
| 插值点的纬度。 |
| 插值点的value值。DataV会根据value值，结合配置面板中的区域颜色颜色映射渲染配置项，调整等值面层的颜色渲染效果。 |
交互面板
此组件没有交互事件。
蓝图编辑器交互配置
在画布编辑器页面，单击基础平面地图 3.0子组件管理列表中等值面层右侧的
图标。单击页面左上角的
图标。在蓝图编辑器配置页面，单击导入节点栏内的等值面层组件，在画布中可以看到如下图所示的等值面层的蓝图编辑器配置参数。
事件
事件
说明
当插值点数据接口请求完成时
插值点数据接口请求返回并经过过滤器处理后抛出的事件，同时抛出处理后的JSON格式的数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
当裁剪边界数据接口请求完成时
裁剪边界数据接口请求返回并经过过滤器处理后抛出的事件，同时抛出处理后的JSON格式的数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
当插值点数据接口请求失败时
插值点数据接口请求失败时（请求失败的情况可能是：网络问题或接口报错等）返回并经过过滤器处理后抛出的事件，同时抛出处理后的JSON格式的数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
当裁剪边界数据接口请求失败时
裁剪边界数据接口请求失败时（请求失败的情况可能是：网络问题或接口报错等）返回并经过过滤器处理后抛出的事件，同时抛出处理后的JSON格式的数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
动作
动作
说明
请求插值点数据接口
重新请求服务端数据，上游数据处理节点或图层节点抛出的数据将作为参数。例如等值面层配置了API数据源为
https://api.test，传到请求插值点数据接口动作的数据为{ id: '1'}，则最终请求接口为https://api.test?id=1。请求裁剪边界数据接口
重新请求服务端数据，上游数据处理节点或图层节点抛出的数据将作为参数。例如等值面层配置了API数据源为
https://api.test，传到请求裁剪边界数据接口动作的数据为{ id: '1'}，则最终请求接口为https://api.test?id=1。导入插值点数据接口
按组件绘制格式处理数据后，导入组件，重新绘制。不需要重新请求服务端数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
导入裁剪边界数据接口
按组件绘制格式处理数据后，导入组件，重新绘制。不需要重新请求服务端数据。具体数据示例请参见画布编辑器中组件右侧配置面板数据页签的数据响应结果区域。
显示
显示组件，不需要参数。
隐藏
隐藏组件，不需要参数。
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