Overview
What is a GPS Survey?
A GPS survey uses signals from the Global Positioning System (GPS) satellite constellation to determine precise geographic coordinates of points on the ground. Combined with differential correction techniques (DGPS/RTK), GPS surveys deliver sub-decimetre accuracy for engineering and cadastral applications.
Why is it Required?
GPS surveys are the modern standard for all large-scale land measurement work. They eliminate the accumulated errors of traditional chaining and traversing methods, deliver geo-referenced data compatible with GIS systems, and provide coordinates that can be used for decades as stable reference benchmarks.
Who Needs it?
Infrastructure developers, government departments, urban planners, satellite imagery analysts, road alignment engineers, solar farm developers, pipeline companies, and anyone requiring geo-referenced survey data.
Key Benefits
Our Survey Process
Site Visit
Reconnaissance to identify satellite visibility, plan occupation times, and set up reference stations.
Data Collection
GPS receiver deployment and systematic collection of raw satellite observations at all required points.
Survey Execution
Measurement of all required ground points using RTK GPS or static methods for maximum precision.
Analysis
Post-processing and network adjustment of GPS data using professional software to verify accuracy.
Report Preparation
Generation of coordinate lists, accuracy statistics, and survey maps in required formats.
Client Delivery
Delivery of coordinate files (CSV/Excel), CAD drawings, GIS layers, and accuracy reports.
Deliverables
Frequently Asked Questions
What is GPS Survey accuracy?
With RTK/DGPS correction, we achieve 1-3 cm horizontal and 3-5 cm vertical accuracy. Post-processed static GPS achieves even higher precision.
Can GPS surveys work in cloudy weather?
Yes. GPS signals pass through clouds without degradation. Only severe physical obstructions like dense forests or tall buildings affect GPS signal quality.
How quickly can GPS surveys cover large areas?
RTK GPS can collect hundreds of points per day across large open areas, significantly faster than traditional survey methods.
What coordinate datum do you use?
We use WGS84 (World Geodetic System 1984) and convert to local systems like Everest, UTM, or state plane as needed by the client.
Is GPS survey data compatible with GIS software?
Yes. We deliver data in formats compatible with ArcGIS, QGIS, AutoCAD Map, and all standard GIS platforms.
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