What Is Topographical Survey?


Author: Roslyn
Published: 23 Nov 2021

Topographical Surveys

A wide range of different equipment will be used in a survey to make precise measurement of the features of a site. Fixed points of land can be produced by accurate gps equipment and used as reference markers to tie in with the national coordinate system. Collaboration with suitable individuals can help you to find the most suitable information to collect during the survey.

A survey will give you accurate land measurements and show you how the site is arranged. It will help guide decisions when it comes to the planning of new buildings, the re-positioning of existing boundaries, and the design of drainage schemes for a site. A topographical survey can bring greater certainty to any planned development by reducing the risk of costly errors which could be made without an accurate picture of a site.

Land Surveying: A Methodology

A topographical survey is also known as a land survey or a topographical land survey. A topographical land survey can be used to determine the location and characteristics of natural and man-made elements. The plan is made from the survey and incorporates human-made characteristics like boundaries, fencing, and walkways.

The topographical survey picks up natural elements such as ground, trees, ponds, and walls. elevation differences are measured than calculated, which makes leveling very accurate. The automatic levelling is done at each location.

A backsight to a station is placed before the level on the track and after the station along the traverse. Tachymetry Survey uses Stadia Rods. A small Stadia Rod is used for shorter distances of 80m to 120m and a big Stadia Rod is used for longer distances.

A Stadia Rod can be up to 6m in height. Vernier scales are used to measure horizontal angles. A magnetic north-south line is used to describe the direction in relation to a reference line.

The line is parallel to the magnetic lines of the earth. The station points and permanent marker points will be fixed by the Surveyors using preciseGPS technology. The recorded points are used as reference markers to align the survey area with the local or national coordinate system.

A Survey of the Site Using an Annotated Drawing

The drawing shows the important levels such as threshold levels, ridge and eaves levels, tree canopy levels, overhead cable heights and contour labels. A professional drawing will be annotated with surface types, boundary types and height, as well as any other findings specific to the site. The results of the survey were drawn manually and plotted onto a physical medium.

The Land Surveyor's Information

The land survey looks like it will be determined by the data obtained at the property. The more data the land surveyor has, the more detailed the survey can be.

Digital Land Surveys

The land surface is three-dimensional and has various features. Digital maps can be very detailed and accurate, thanks to modern equipment. A professionally drafted plan will record a lot of noteworthy land features.

Natural features that a surveyor would plot on a map include terrain levels, trees and vegetation. Engineers need to know the location of the property before they can make a decision about the grade. They don't know if the land will make a good foundation without knowing the elevation.

There are many benefits to having a topographical survey done. Accurate and detailed data on your sites is useful to various parties involved in the development of land or environmental projects. If you can see a topographical map, you can see if you can develop the land for its intended use.

It is possible to make a plan for the property if you know the conditions and noteworthy features. It is important to make sure the construction the plot is durable after collecting accurate data from a topographic survey. The data can be kept and used in the future.

Topographic Maps

A land survey is a type of survey that is ordered to identify property boundaries before construction or development. There are also other types of surveys. Topographic maps show the elevation and the lines of the land in three dimensions.

To show relative elevation, distance, and positions of landforms, maps use symbols that include color-coding. Landforms can be described by the shape, direction, and how close they are together. A canyon or a gullies is represented by V- or U-shaped lines on the map, while a pass or a saddle is represented by an hourglass shape.

A topographical survey shows the layout and levels of the land. The site's topography is made up of many features, including boundary positions and types, footpaths, walls, service covers, steps, building positions, tree locations and more. Most modern topographical surveys are now rotating to fit the location the national grid.

A Study of the Traverse Line Project

1. A traverse line is a series of straight lines that connect traverse stations. A traverse follows a zigzag course, which means it changes direction at each traverse station.

17 You should keep a record of all the measurements you made. You can use a table like the one shown in the example or you can sketch out the open traverse on square-ruled paper, noting down your measurement next to the correct stations.

20. You can lay out a closed traverse ABCDEA in the same way as an open traverse, but you have to connect the last point to the initial point A. There are 9.

You can build a tripod with legs made of wood or with a different style of legs. A tripod with legs that are adjusted is more difficult to make than a plane-table that is set up on the ground. 19

Attach the legs with bolts, washers and wing nuts if you want to use them for a project. The plane-table is ready to use. You may need to set up the plane-table so that a point on it is exactly over a ground point.

Topography is the study of the shape and features of land. The surface shapes and features on the ground are referred to as the topography of the area. A map showing both natural and man-made features is required for traditional definitions.

A survey gathers data about the land's features and terrain. The ground and its boundaries are defined by permanent features such as buildings, fences, trees and streams. The elevation of the terrain is shown by the land levels.

Topographic maps are used by architects, engineers, building contractors and others to accurately see their sites. A survey is used as a basis for design decisions. An accurate digital plan of the site area is needed by an architect or consulting engineer.

The survey and data can be used for a variety of purposes. On-site robotic total station instruments are used to detail features. The instrument has an onboard feature code list.

Reporting to the Engineer

The scope and elements of a report are determined by the engineer who is conducting the report, and they are dependent on a variety of factors. If the soil is found to be unacceptable, the engineer should make suggestions on how to fix the problem.

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