Inertial Navigation System (INS) surveying
This is one of the most specialized services we offer: surveying where satellite reception is blocked or compromised by obstructions – including in underground mines.
Inertial navigation uses gyroscopes and accelerometers to provide an estimate of position, velocity, attitude, and attitude rates of the vehicle on which the INS is carried. An inertial navigation system (INS) consists of an inertial measurement unit (IMU) containing the sensors – gyroscopes and accelerometers – mounted rigidly to a common base, and the computer navigation system. INS is a very useful tool for survey-quality positioning in areas that are unsuited to optical surveying or lack good GNSS reception. The INS functions independently of external infrastructure, like satellites.
Seisland was the first survey company in Canada to acquire an all-terrain land navigation system, housed in an ergonomic backpack: the Position and Orientation System for Land Survey (POS LS). Manufactured by Applanix Corporation (now a Trimble company), the POS LS is designed for land survey applications by complementary integration of an INS and an RTK GNSS receiver. It is optimized for pedestrian use and is also used by Seisland on an ATV or UTV. By following the manufacturer’s operating procedures, we meet the accuracy required by our clients.
Seisland has proven that INS can be cost-effective in: