Arun Soil Lab Pvt.Ltd.
Geotech and Material Consultants
Ensure and Assure safety of the structures for a better
And safe place to live and work with strong foundation

Quality Consiousness is Our Core Concept

Certificate No. : TC-5382
NABL Accredited as per
ISO/IEC: 17025 - 2005

TOPOGRAPHY SURVEY
By Differential Global Positioning System
  • DGPS receiver is the most advanced instrument to determine geographical position by receiving signals from geo-positioning satellite network. There are various categories or types of DGPS receiver available. The field of application of a DGPS receiver depends on its category. The GPS receivers those gives high degree of positional accuracy are generally used for control work. Lower precision DGPS receivers are used for simple verification, navigation purpose etc. Post-processing is used in Differential GPS to obtain precise positions of unknown points by relating them to known points such as survey markers. The GPS measurements are usually stored in computer memory in the GPS receivers, and are subsequently transferred to a computer running the GPS post-processing software. The software computes baselines using simultaneous measurement data from two or more GPS receivers.
By Total Station
  • A total station or TST (total station theodolite) is an electronic/optical instrument used in modern surveying and building construction. The total station is an electronic theodolite (transit) integrated with an electronic distance meter (EDM) to read slope distances from the instrument to a particular point.
APPLICATION
  • Angle measurement
  • Coordinate measurement
  • Distance measurement
  • Data processing
ADVANTAGES OF USING TOTAL STATION
  • Field work is carried out very fast.
  • Accuracy of measurement is high.
  • Manual errors involved in reading and recording are eliminated.
  • Calculation of coordinates is very fast and accurate. Even corrections for temperature and pressure are automatically made.
  • Computers can be employed for map making and plotting contour and cross-sections. Contour intervals and scales can be changed in no time.
Auto Level
  • Automatic level is an optical instrument used to establish or verify points in the same horizontal plane. It is used in surveying and building with a vertical staff to measure height differences and to transfer, measure and set heights.
Operation
  • The level instrument is set up on a tripod and, depending on the type, either roughly or accurately set to a leveled condition using footscrews (levelling screws). The operator looks through the eyepiece of the telescope while an assistant holds a tape measure or graduated staff vertical at the point under measurement. The instrument and staff are used to gather and/or transfer elevations (levels) during site surveys or building construction. Measurement generally starts from a benchmark with known height determined by a previous survey, or an arbitrary point with an assumed height.