Digital Surveying

Benchmarks

Surveying Leveling

Unknown Width and Height

Closed Traverse

Total Station Survey

AutoCAD Civils 3D

Example Assessment

Benchmarks

Benchmarks: Preserving the stone markings around Northern IrelandBenchmarks, which were used during the mapping of the island of Ireland, are being lost.

Benchmarks - Google My MapsOSNI Benchmarks throughout Northern Ireland

OSNI DiscovererOSNI Discoverer, 1:50 000 (2 cm to 1 km, 1¼ inches to 1 mile), Irish Grid.

OSI DiscoveryOSI Discovery, 1:50 000 (2 cm to 1 km, 1¼ inches to 1 mile), Irish Grid.

OS LandrangerOS Landranger, 1:50 000 (2 cm to 1 km, 1¼ inches to 1 mile), British Grid.

Surveying Leveling

Using and setting up a Surveying or Dumpy Level
This video covers how to set up a dumpy level, how to adjust the tripod, level the dumpy level amd how to take readings.

Levels - Rise and Fall Method.pdf

A4 Level Booking sheet.pdf

A3 Level Booking sheet v2.pdf

Level Booking sheet A3 v2.pdf

Surveying levels Example 1

This video shows you how to complete a surveying levels bookings sheet for measurements with a dumpy level, then calculate the reduced level at each point using the rise and fall method. Numerical checks are then applied to verify previous calculations

Surveying levels Example 2

This video shows you how to complete a surveying levels bookings sheet for measurements with a dumpy level, then calculate the reduced level at each point using the rise and fall method. Numerical checks are then applied to verify previous calculations