Topographic / Land Survey

A map is the best tool available to catalog and view the arrangement of things on the Earth’s surface. Maps of various kinds–road maps, political maps, land use maps, maps of the world–serve many different purposes.

image062One of the most widely used of all maps is the topographic map. The feature that most distinguishes topographic maps from maps of other types is the use of contour lines to portray the shape and elevation of the land. Topographic maps render the three-dimensional ups and downs of the terrain on a two-dimensional surface.

Topographic maps usually portray both natural and manmade features. They show and name works of nature including mountains, valleys, plains, lakes, rivers, and vegetation. They also identify the principal works of man, such as roads, boundaries, transmission lines, and major buildings.

The wide range of information provided by topographic maps make them extremely useful to professional and recreational map users alike. Topographic maps are used for engineering, energy exploration, natural resource conservation, environmental management, public works design, commercial and residential planning, and outdoor activities like hiking, camping, and fishing.Topographic Surveys plays an important role in Urban Development, Infrastructure Projects, Hydro Projects, Highways, Railways, Irrigation. Prior to planning, design and constructions, the first step in every study is to prepare an accurate Map of the area by conducting Topographic Survey. The main objective of topographical survey is to prepare an accurate map with all existing features like roads, railways, bridges, culverts, electric lines, telephone lines, gas pipelines, trees, OFC etc; prepare contour plan to show the elevation variation; fixing the alignment of Tunnels, Rail Tracks, Highways, Pipelines, Canals; generate Cross-sections and L-section.

image064TVIPL provides topographic surveying indicating the grade, slope, and terrain features of the project for land planning, engineering, and design purposes. We use several methods to prepare topographic surveys, including grid topography, stadia topography, Real Time Kinematic GPS, and aerial topography.

Before beginning a topographic survey, accuracy requirements and property characteristics, as well as client desires, are considered to determine which method would be best-suited. Our total stations provide input for our CAD systems, enabling direct digital mapping of topographic surveys and computer analysis of contours, slope, and quantities.

Our professionals at TVIPL use state-of-the-art equipment for topographic surveys such as satellite imagery, Differential Global Positioning System (GPS), Electronic Total Station and Auto-level.

Global Positioning System (GPS) is a technology using a constellation of 24+ satellites in low-earth orbit to provide precise, all weather, 24-hour, three-dimensional positioning information anywhere on the earth.

Total Station is the most modern instrument being used for topographical surveys worldwide. The system incorporates electronic theodolite, electronic distance measurement device and computer as one unit. The capability of the system to retain data in memory, carry out calculation using its own processor, and finally ability to create X, Y, Z files directly transferable to the computer, makes the survey process very fast and accurate.

Auto-level is used to accurately transfer the Z co-ordinate from a Benchmark to the Control Points, for controlling the vertical accuracy of the Total Station during a topographical survey.