Topographic Survey a survey that measures the elevation of point on a particular piece of land, and presents them as contour lines on a plot. The purpose TOPOGRAPHIC SURVEY is to gather survey data using total stations, auto levels, GPS etc., about the natural and man-made features of the land, as well elevations. From this information a three - dimensional map may be prepared, you may prepare the topographic map in the offices after collecting the field data or prepare it right away in that field by plane table. The work usually consists of the following:
- Establishing horizontal and vertical control that will serve as the framework of the survey.
- Determining enough horizontal location and elevation of ground points to provide enough data for plotting when the map is prepared.
- Locating natural and man-made features that may be required by the purpose of the survey.
- Computing distances, angles, and elevations.
- Drawing the topographic map topographic surveys are commonly identified with horizontal and/or vertical control of third and lower -order accuracies.
Cadastral Surveys are conducted to establish the exact location, boundaries, or subdivision of a tract of land in any specified area. This type of survey requires professional registration in all states. Presently, land surveys generally consist of the following chores:
- Establishing markers or monuments to define and thereby preserve the boundaries of land belonging to a private concern, a corporation, or the government.
- Relocating markers or monuments legally established by original surveys.
- This requires examining previous survey records and retracing what was done. When some markers or monuments are missing, they are reestablished following recognized procedures, using whatever information is available.
- Rerunning old land survey lines to determine their lengths and directions. As a result of the high cost of land, old lines are premeasured to get more precise measurements.
- Subdividing landed estates into parcels of predetermined sizes and shapes.
- Calculating areas, distances, and directions and preparing the land map to portray the survey data so that it can be used as a permanent record.
Route Surveying is comprised of all survey operations required for design and construction of engineering works such as highways, pipelines, canals of railroads. At Caltrans a route surveying system is generally associated with highway design and construction.
A route surveying system usually contains four separate but interrelated processes:
- Reconnaissance and planning
- Works design
- Right of way acquisition
- Construction of works
Generally, the preliminary survey for this work takes the form of a topographic survey.
In the final stage, the work may consist of the following:
- Locating the center line, usually marked by stakes at required intervals called stations
- Determining elevations along and across the center line for plotting profile and cross sections
- Plotting the profile and cross sections and fixing the grades
- Computing the volumes of earthwork and preparing a mass diagram
- Staking out the extremities for cuts and fills
- Determining drainage areas to be used in the design of ditches and culverts
- Laying out structures, such as bridges and culverts
- Locating right-of-way boundaries, as well as staking out fence lines, if necessary
Using Electromagnetic and Ground Penetrating Radar techniques we can accurately mark out the locations and depths of all underground utilities and features. Using a Topographical or Ordnance survey plan of the desired survey area, we can accurately record all findings and produce a collaboration of all services and features onto an easy to read drawings in AutoCAD and hard copy formats.
This package can be tailored to your specific needs to include the addition of Manhole Survey Cards, Inspection Chamber Asset Sheets, Photographs and Utility Survey Reports as required to your specific needs.Top
All types of mapping require establishment of an accurate control framework on the ground. We establish ground control employing differential GPS and/or total Stations.
Such control surveys are conducted by us for the following requirements.
- Creation of geodetic framework
- Photogrammetric mapping
- Field contouring and topography
- Site surveys for real estate and housing developers
- Route plans and profiles for power line and pipe line corridors
- Engineering surveys
- Property and cadastral surveys
- Setting-out / relaying on the ground for all types of construction work and as built surveys
- On-the-ground alignment, cross section & L-section generation and demarcation of physical infrastructure and utility corridors