I. Overview
Hebei Province, abbreviated as "Ji", is named for its location north of the Yellow River. It is located in the North China Plain, with the Bohai Sea in the east, Beijing and Tianjin in the inner ring, Taihang Mountain in the west, Yanshan Mountain in the north, and Zhangbei Plateau to the north of Yanshan Mountain.
Hebei is one of the birthplaces of the Chinese nation. As early as more than 5,000 years ago, the three ancestors of the Chinese nation, Huangdi, Yandi and Chiyou, went from fighting to integration in Hebei, creating the history of Chinese civilization. During the Spring and Autumn Period and the Warring States Period, Hebei belonged to the states of Yan and Zhao, so it was called "the land of Yan and Zhao". In the Han Dynasty, it belonged to Youzhou and Jizhou. The Tang Dynasty was Hebei Road, the Song Dynasty was Hebei Road, and the Yuan Dynasty was Zhongshu Province. Ming and Qing Dynasties belonged to Zhili Province. During the War of Liberation, Xibaipo, Hebei was the temporary seat of the Central Committee of the Communist Party of China.
In the Qing Dynasty, it belonged to Zhili Province, with jurisdiction over Shuntian Mansion (Daxing, Wanping), Shunde Mansion (Xingtai), Guangping Mansion (Yongnian), Baoding Mansion (Qingyuan), Zhengding Mansion (Zhengding), Tianjin Mansion (Tianjin), River Jianfu (Hejian), Chengde House (Chengde), Daming House (Daming), Yongping House (Lulong), Xuanhua House (Xuanhua), etc. The capital of Zhili Province is in Baoding. Since the eighth year of Yongzheng, the Governor of Zhili has been stationed in Baoding Mansion (now Baoding City).
After the founding of the Republic of China, Nanjing was the capital of the National Government at that time. Today, the territory of Hebei mainly belongs to Zhili Province. Later, because the name of Zhili Province did not live up to its name, it was changed to Hebei Province in 1928 because the land was located north of the Yellow River.
2. How to download the Google Earth elevation DEM data in Hebei Province?
The offline data package of the Google Earth Elevation DEM contour line in Hebei Province is 237.9MB, which can be downloaded directly from the Baidu network disk.
The download address is:
https://pan.baidu.com/s/1S7o0CLPWa8JJGC-6BAjYbg
The decompressed directory mainly includes the Google Earth Elevation DEM Data .dat of Hebei Province, the Google Earth Elevation DEM Data of Hebei Province .idx and the Google Earth Elevation DEM Data of Hebei Province .kml files.
Double-click the shortcut of "Google Earth Elevation Data Reading and Exporting Tool" to download "Shuijingzhu Universal Map Downloader" for exporting elevation data as TIF files.
3. Administrative divisions of counties and cities included in the Google Earth elevation DEM data in Hebei Province
The administrative division of Google Earth elevation DEM data in Hebei Province mainly includes 11 prefecture-level cities (Shijiazhuang City, Tangshan City, Qinhuangdao City, Handan City, Xingtai City, Baoding City, Zhangjiakou City, Chengde City, Cangzhou City, Langfang City, Hengshui City) .
How to export Google Earth elevation DEM data in Hebei Province as TIF files?
After downloading and installing the universal map downloader and launching it, click "Task List" to open the download task list.
在下载任务列表中，点击“导入”按钮，会显示文件选择对话框。
在文件选择对话框中，可以选择需要导入的“河北省谷歌地球高程DEM数据.dat”文件。
单击列表中的文件名称，可以查看所有图片的瓦片映射点，可以查看数据的完整性。有数据为绿色点，无数据为蓝色点，点击“查看结果”按钮可以预览查看高程DEM数据的渲染效果图。
移动鼠标到需要导出的影像名称上方，点击显示的“导出”按钮会显示“导出设置”对话框，可以将下载的河北省谷歌地球高程DEM数据拼接为大图，也可以导出为Cesium开源三维地球的高程DEM瓦片数据。
在将河北省谷歌地球高程DEM数据导出拼接为大图时，可以很方便地设置导出文件存储格式、坐标投影和设置背景透明等。同时，支持导出西安80、北京54和WGS84等多种平面坐标投影方式。
这里将坐标投影选择为“西安80高斯投影”、文件保存格式为“GeoTIF(*.tif)”、背景设置为透明，且勾选按边界范围剪裁等相关参数。设置完成之后，点击“确定”会导出下载结果。
需要将河北省谷歌地球高程DEM数据导出为CESIUM开源三维地球瓦片时，只需要选择“导出瓦片”功能项，然后选择瓦片格式为“高程CES瓦片”即可。
四、河北省谷歌地球高程DEM数据如何打开查看？
谷歌地球高程DEM数据需要在专业软件中才可以进行打开查看，如GlolbalMapper或ArcGIS等,这里以GlobalMapper为例。在导出结果目录中，将“河北省谷歌地球高程DEM数据.tif”文件拖放到GlobalMapper中即可打开，效果如下图所示。
河北省谷歌地球高程DEM数据局部放大之后，效果如下图所示。
五、河北省谷歌地球高程DEM数据如何提取10米等高线？
河北省谷歌地球高程DEM数据如何提取10米等高线的方法，请参阅官网教程：
六、结语
To sum up, the offline package of Hebei Google Earth elevation DEM data directly downloaded from Baidu's network disk can be exported as a TIF elevation file in Xi'an 80 or Beijing 54 coordinate system through the universal map downloader according to actual application requirements.
The TIF elevation DEM file exported by the universal map downloader can also be used to extract contour lines or generate 3D terrain through professional software such as GlobalMapper or ArcGIS, which is suitable for 3D simulation, 3D terrain modeling or construction of virtual 3D scenes and other applications.
For related documentation tutorials, see:
GlobalMapper cracked Chinese version download and install graphic tutorials