LA County Benchmarks
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资源简介：
The current dataset has locations of nearly 9,000 benchmarks that make up part of the Los Angeles County Department of Public Works’ Vertical Control Network. Elevation data derived from these benchmarks are based on NAVD88 Datum and are primarily used by private and public surveyors, for new construction, as-built plans and in creating flood maps for flood insurance purposes.
创建时间：
2021-05-19
