High-resolution bathymetric dataset of Lake Issyk, Kazakhstan: new insights into the morphology of a mountain reservoir

The collection contains raster and vector data acquired during the bathymetric study of Lake Issyk. The primary data is provided as a digital elevation model of the lakebed, stored in GeoTIFF format. The raster file (Esik_DEM.tif) possesses a spatial resolution of 1 meter and offers comprehensive data on the depths and morphology of the lakebed. A The digital elevation model (Esik_DEM.tif) is created based on a shapefile with point data representing depth values reduced to the corresponding coordinates. Spatial sampling algorithms were employed to generate the point shapefile. Employing an echo sounder with a data gathering interval of 1-2 seconds ensured the data's accuracy. The error in-depth readings is ±0.5% of the observed depth, attributable to the features of the echo sounder and external influences, including vessel speed and weather conditions. Nonetheless, the impact of these effects is mitigated due to the cyclical nature of data gathering.本数据集涵盖伊塞克湖（Lake Issyk）水深测绘研究中获取的栅格数据与矢量数据。核心数据为湖床数字高程模型（Digital Elevation Model，简称DEM），存储格式为GeoTIFF。该栅格文件（Esik_DEM.tif）空间分辨率达1米，完整覆盖湖床水深与地形形态相关数据。 小节A：该数字高程模型（Esik_DEM.tif）基于带有归算至对应地理坐标的水深点数据的Shapefile（形状文件）生成。研究通过空间采样算法生成该点形状文件。采用数据采集间隔为1-2秒的回声测深仪（echo sounder）保障了数据精度。水深测量误差为观测水深的±0.5%，该误差源于回声测深仪本身特性及船舶航速、气象条件等外部影响因素。不过由于数据采集具有周期性，上述影响已得到有效抑制。