IISD Experimental Lakes Area: Bathymetry Data Package, 1968-2023

The IISD Experimental Lakes Area (IISD-ELA) bathymetry data package provides bathymetric data on IISD-ELA lakes in a variety of formats and degrees of processing. The data package has been organized into four parts: tabular, geospatial, maps, and additional metadata. Tabular data include cumulative and interval values for area and volume at specific depth ranges, summary statistics (perimeter, surface area, total volume, mean depth, and maximum depth), and metadata for the lakes (such as water level on date of survey and methods used to collect and process the data). Geospatial data are suitable for map-making and geospatial analysis. The geospatial folder includes raw coordinate data (CSV) and processed geospatial outputs: contour lines (geodatabase and geopackage), lake polygons (geodatabase and geopackage), and raster DEMs (geodatabase and TIFF). Maps are provided in PDF format in black and white or colour. Where current maps are not available, historical maps have been provided, which are black and white scans. Additional metadata files include the Info Sheet PDF, which provides details for interpreting column names and understanding surveying and processing methods. A materials overview CSV table is provided, outlining which data types are available for each lake. A lake polygon metadata CSV table specifies which satellite imagery providers and dates were used to refine lake polygon outlines. The data package is ongoing - updated data will be provided as more lakes are surveyed and data processed. If current data do not exist for the lake you are interested in, please get in touch with us - we may be able to add a survey of that lake to our bathymetry survey schedule.

国际可持续发展研究所实验湖区（IISD Experimental Lakes Area, IISD-ELA）湖底地形测量（bathymetry）数据集包，提供了IISD-ELA下属湖泊的湖底地形测量数据，涵盖多种格式与不同处理程度的数据集。
该数据集包分为四个部分：表格数据、地理空间数据、地图文件及附加元数据。
表格数据包含特定深度区间下的面积与容积累积值及区间值、汇总统计量（周长、表面积、总容积、平均水深与最大水深），以及湖泊元数据（如调查当日水位、数据采集与处理方法等）。
地理空间数据适用于制图与地理空间分析。地理空间文件夹包含原始坐标数据（逗号分隔值（Comma-Separated Values, CSV）文件）与经处理的地理空间输出产物：等高线（地理数据库（geodatabase）与GeoPackage格式）、湖泊多边形（地理数据库（geodatabase）与GeoPackage格式）以及栅格数字高程模型（Digital Elevation Model, DEM，地理数据库（geodatabase）与TIFF格式）。
地图以PDF格式提供，包含黑白与彩色两种版本。若暂无最新地图，则提供历史地图——此类地图为黑白扫描件。
附加元数据文件包含信息表PDF，该文件详细说明了如何解读数据列名，以及了解测量与处理方法。此外还提供一份数据概览CSV表格，概述各湖泊可获取的数据类型；另有一份湖泊多边形元数据CSV表格，明确了用于优化湖泊多边形轮廓的卫星影像提供商与采集日期。
本数据集包处于持续更新状态——随着更多湖泊完成测量与数据处理，将同步提供更新后的数据集。若您关注的湖泊暂无现有数据，请与我们联系——我们可将该湖泊的测量工作纳入水深测量计划。