I. Overview
Heilongjiang Province, referred to as Hei, is the capital city of Harbin, located in the most northeastern part of China.
Heilongjiang is the northernmost and easternmost province in China, with the highest latitude and easternmost longitude. Heilongjiang Province starts from 121°11' in the west, 135°05' in the east, 43°25' in the south, and 53°33' in the north, spanning 10 latitudes and 2 heat zones from north to south; Area. It covers an area of 473,000 square kilometers (including Jiagedaqi District and Songling District). The north and east are adjacent to Russia, and the border line is 3045 kilometers long.
Heilongjiang Province has a long history. In the pre-Qin era, some ancestors of the three major clans, Sushen, Donghu and Huilai, had already settled in the Heilongjiang area. From the 4th century BC to the 3rd century BC, the Fuyu regime was established, which spanned the southern part of what is now Heilongjiang Province. After the Qin Dynasty , In the Heilongjiang area, there are Yilou people, Fuyu people, Xianbei people, Wuji people and Mohe people.
2. How to download Google Earth elevation DEM data in Heilongjiang Province?
The offline data package of the Google Earth Elevation DEM contour line in Heilongjiang Province is 437.9MB, which can be downloaded directly from the Baidu network disk.
The download address is:
https://pan.baidu.com/s/1D5F9SHiGqoQvWzZVo4PIOQ
The decompressed directory mainly includes the Google Earth Elevation DEM Data .dat in Heilongjiang Province, the Google Earth Elevation DEM Data in Heilongjiang Province .idx and the Google Earth Elevation DEM Data in Heilongjiang 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 Heilongjiang Province
The administrative division of Google Earth elevation DEM data in Heilongjiang Province mainly includes 13 prefecture-level administrative units, namely Harbin City, Qiqihar City, Mudanjiang City, Jiamusi City, Qitaihe City, Daqing City, Heihe City, Suihua City, Yichun City, Hegang City, Shuangyashan City, Jixi City, and Daxinganling area.
How to export Google Earth elevation DEM data as TIF files in Heilongjiang Province?
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“黑龙江省谷歌地球高程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，可以将下载的黑龙江省谷歌地球高程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。
在将黑龙江省谷歌地球高程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。
需要将黑龙江省谷歌地球高程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、黑龙江省谷歌地球高程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“黑龙江省谷歌地球高程DEM数据.tif”文件拖放到GlobalMapper中即可打开，效果如下图所示。
黑龙江省谷歌地球高程DEM数据局部放大之后，效果如下图所示。
五、黑龙江省谷歌地球高程DEM数据如何提取10米等高线？
黑龙江省谷歌地球高程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 Google Earth elevation DEM data in Heilongjiang Province 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