Topographic survey

Topographic survey service

  1. Set up GPS servey control and pass landmarks
  2. Horizontal control servey
  3. Horizontal control servey: Secondary control servey following Government coordinate systerm
  4. Establishing base height grid following Government height systerm.
  5. Prepare topographic survey reports
  6. Prepare construction survey acceptance documents
  7. Hand over topographic survey report
  8. Set of competency certificates (5 types)

Sequence of topographic survey process

The national horizontal control points are collected as control points to establish the grade IV horizontal network. Network establishing method: relative positioning of GPS technology.

-Grade IV horizontal control point: 2 points

The grade IV horizontal control points are collected as control points to establish the class 2 horizontal network. Network establishing method: relative positioning of GPS technology

-Class 2 horizontal control point

Technical vertical network

– Elevation control point: grade IV control point, signed  GPS-1 and GPS-2 is constructed by Phuong Anh Company. Its status is good and available for using

Tasks levelling

To establish the technical vertical control network, we use the national control points, signed GPS-1 and GPS-2 as original control points

We carried out technical levelling from grade IV vertical control point, numbered GPS-1 and to point  DC-1 and DC-2 by using Topcon auto level.

Measuring and drawing detailed topographic map at scale 1/500

Measure the current status of the project location

Topographic survey
Topographic survey
Topographic survey
Topographic survey
Topographic survey