等高线 / 等值线生成
由高程栅格按 Marching Squares 生成等值线（等高线），支持等距/基面、地理参考、计曲线加粗，导出 GeoJSON LineString
行序「北→南」、列序「西→东」，数值为高程（米）。
高程 12.0~198.5 · 电平 9 · 等值线 14 条
电平数：9等值线：14闭合环：6
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}等值线预览首曲线计曲线（悬停看高程）
Leaflet © 高德地图
等值线由 Marching Squares 在单元格边上线性插值生成，再串联成折线并识别闭合环。底图用高德栅格瓦片（境内直连、无需 key），它是 GCJ-02 加偏坐标系；绘制时自动做 WGS84→GCJ-02 纠偏，因此图上的轨迹/图形会贴合高德路网，而统计与导出仍是文件里的原始 WGS84。高德瓦片仅覆盖中国范围，境外数据可切 OSM/ESRI 底图查看（境内可能拉不到）。
关于 等高线 / 等值线生成 工具
等高线 / 等值线生成 是云海百宝箱提供的一个免费在线工具。由高程栅格按 Marching Squares 生成等值线（等高线），支持等距/基面、地理参考、计曲线加粗，导出 GeoJSON LineString 该工具完全在浏览器中运行，无需下载安装任何软件，跨平台支持 Windows、Mac、Linux 及移动设备，数据在本地处理不上传服务器。
与 等高线 / 等值线生成 配合常用的同类工具： GIS 坐标工具箱、坐标转换、在线地图加载、地图测距工具、坐标格式互转、坐标批量转换
等高线 / 等值线生成 使用方法
- 在输入框中输入或粘贴需要处理的内容
- 选择相应的处理选项或参数
- 点击"处理"或"转换"按钮获取结果
- 点击"复制"按钮可一键复制结果到剪贴板