ARCGIS入门之制作dem高程图——以江西省九江市为例

哈啰这里是一只阿居斯(/k/不发音)(●ˇ∀ˇ●),今天带大家制作一张dem高程图~过程超详细!

数据来源

地理空间数据云——提供dem高程数据首 页 - 地球资源数据云

具体操作

1.将九江市行政区划和研究区utm图块导入后搜索“镶嵌至新栅格”,选择utm影像,设置输出位置和像素类型

2.搜索工具——按掩膜提取,提取九江市dem

3.右键设置图层属性——设置色带

4.搜索——山体阴影,设置研究区dem山体阴影

以下是一个基本的cesium代码,用于导入tiff高程片: ```javascript <!DOCTYPE html> <html lang="en"> <head> <title>Cesium - Inserting Tiff Elevation Data</title> <style> @import url(../Templates/Widgets/widgets.css); html, body, #cesiumContainer { width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden; } #loadingOverlay { background: rgba(57, 76, 103, 0.5); color: #fff; position: absolute; top: 50%; left: 50%; margin: -25px 0 0 -50px; width: 100px; height: 50px; text-align: center; line-height: 50px; z-index: 10000; } #loadingIndicator { height: 50px; width: 50px; margin: 0 auto; background-image: url(../Templates/Widgets/Images/loading-indicator.gif); background-repeat: no-repeat; background-position: center; } </style> <script src="../ThirdParty/requirejs-2.1.20/require.js"></script> <script> require.config({ baseUrl: '../Source', paths: { 'Cesium': '../Build/Cesium/Cesium', 'cesiumjs': '../Build/Cesium' } }); require([ 'cesiumjs/Cesium', 'cesiumjs/Widgets/Viewer/Viewer', 'cesiumjs/Core/Cartographic', 'cesiumjs/Core/CesiumTerrainProvider', 'cesiumjs/Core/Cesium3DTileset', 'cesiumjs/Scene/SceneMode', 'cesiumjs/Scene/ImageryLayer', 'cesiumjs/Scene/Globe', 'cesiumjs/Scene/TerrainProvider' ], function (Cesium, Viewer, Cartographic, CesiumTerrainProvider, Cesium3DTileset, SceneMode, ImageryLayer, Globe, TerrainProvider) { var viewer = new Viewer('cesiumContainer'); viewer.scene.globe.terrainProvider = new CesiumTerrainProvider({ url : 'https://assets.agi.com/stk-terrain/v1/tilesets/world/tiles', requestVertexNormals: true }); var tiffProvider = new CesiumTerrainProvider({ url : 'http://localhost:8000/path/to/tiff/tiles', requestVertexNormals: true }); viewer.scene.terrainProvider = tiffProvider; var imageryLayer = new ImageryLayer(new Cesium.UrlTemplateImageryProvider({ url: 'https://webglobe24.de/krater/{z}/{x}/{y}.jpg', credit: 'Krater' })); viewer.scene.imageryLayers.add(imageryLayer); var globeDepth = new Globe(); var terrainProvider = new TerrainProvider(); viewer.scene.terrainProvider = tiffProvider; var position = Cesium.Cartographic.fromDegrees(-94.4375667,39.0660454,0); var height = tiffProvider.getHeight(position); var cartographic = Cesium.Ellipsoid.WGS84.cartesianToCartographic(position); cartographic.height = height; var surface = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height); viewer.camera.position = surface; viewer.camera.lookAt(Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height + 1000), new Cesium.Cartesian3(0.0, 0.0, 1.0)); viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY); viewer.scene.globe.depthTestAgainstTerrain = true; var tileset = new Cesium3DTileset({ url: "./Tilesets/Batched/BatchedColors/tileset.json", maximumMemoryUsage: 2048 }); tileset.readyPromise.then(function() { viewer.scene.primitives.add(tileset); viewer.camera.zoomTo(tileset); }); }); </script> </head> <body> <div id="cesiumContainer"></div> <div id="loadingOverlay"><div id="loadingIndicator"><div class="rotating"></div></div></div> </body> </html> ``` 需要注意的是,上面代码中的tiffProvider.url需要根据实际的tiff文件路径进行修改。由于使用Cesium导入tiff高程片需要将其切片成小块,因此需要使用专门的软件工具进行操作。可以借助GDAL等工具或在线转换服务来实现。
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值