Elevation Contour Lines for King County - 40 Foot Index Contours

For more information about this layer please see the GIS Data Catalog. Forty (40) foot interval elevation contours for King County, derived primarily from 2021 lidar. The 40 foot contours are a subset of the 5 foot contour layer.The contour interval represents a best compromise between the vertical and horizontal accuracy of the source data and the need for a general use cartographic and analysis product. The data provide a reasonable depiction of the general shape of the land, useful for determining general landform, slope, and elevation. These contours are provided only as an interpretation of the earth's surface for reference use and do not replace the need for a professional land survey.如需了解该图层的更多信息，请查阅地理信息系统（GIS）数据目录。本数据集为金县（King County）的40英尺间隔海拔等高线，主要源自2021年激光雷达（lidar）数据。该40英尺等高线是5英尺等高线图层的子集。该等高线间隔是在源数据的垂直与水平精度，与通用制图及分析产品的需求之间达成的最优折中方案。本数据可合理呈现地表的整体形态，可用于识别宏观地貌、坡度与海拔信息。本等高线仅作为地表形态的解译参考资料提供，无法替代专业土地测量工作。