Abstract:
A topographic map is a detailed and accurate two-dimensional representation
of natural and human-made features on the Earth's surface. For an agriculture
engineer, it is an important prerequisite as their sphere of activities include soil and
water conservation, design and execution of irrigation systems, drainage network,
location decisions of farm infrastructures, local and regional agricultural planning
among other things. This project work mainly focused on the preparation of
topographic map of KCAET campus, Tavanur using modern surveying equipments
such as DGPS (Trimble) and Total Station (Pentax). Using the field collected data
from DGPS, a topographic map was plotted using ArcGIS10.3 software. TIN,
contour map were generated from this topographic map. In GNSS survey, post-
process kinematic survey method was adopted. Post- processing of field collected
data was done in Trimble Business Center software. The base line report obtained by
exporting the data from the software provides the longitude, latitude, elevation,
easting and northing etc. of the field point. It was found that, in Kerala terrain (with
dense canopy) working with DGPS alone does not give good result whereas, in
combination with TSS gives better and more satisfactory results. The integrated
survey using DGPS and TS gives more accuracy and great speed in topographic
surveying and they can be used to accommodate various engineering planning
requirements. GNSS and TS are not replaceable equipments but, they are
complimentary to each other.
