Centerline ties are survey lines that connect a point to other surveyed lines to determine the center of an intersection. Locations of City of Signal Hill centerline ties can be seen on the Centerline Tie Index (PDF). Individual centerline ties can be seen or printed from the following links:
Note: Some centerline ties could not be scanned. Please visit the Public Works Department to see those not listed here
A benchmark is a survey mark made on a monument having a known location and elevation, serving as a reference point for surveying. Locations of City of Signal Hill benchmarks can be seen on the Benchmark Index (PDF).
Individual Benchmarks can be seen or printed from the following links: