Navmatica at MEGF 2016

Dubai, UAE, January 2, 2016
Navmatica at Middle East Geospatial Forum 2016

Held at Bustan Rotana Hotel, Dubai, UAE 25-27 January, 2016

Navmatica will present a number of oral presentations summarizing its recent projects in the Middle East Region, including:

 

Paper 1:  Precision Geodetic Control for Mega Construction Projects

By

M. Mostafa, V. Huynh,  A. Shaker,  F. Hamshou, C. Tierie, B. Tapia, and  P. Woutersen

 

Abstract

 

Worldwide, every country establishes its geodetic control for surveying and mapping purposes. Geodetic Control is typically established in 1st, 2nd, and 3rd order which imply different monumentation, density and accuracy. For Mega construction Projects, construction engineers, designer engineers, planners, and surveying engineers typically require dedicated geodetic control for construction purposes. The typical requirements for mega construction projects necessitate large volume of these geodetic control yet ultra-high accuracy for sensitive construction purposes. The naming convention for geodetic control has been almost standardized to Primary Reference Markers (PRMs) in the construction field. Which in reality is nothing but geodetic control as far as precision and monumentation are concerned. The only difference is the use and validity period of those PRMs which is typically within a few years only as oppose to typical governmental geodetic control networks which last a life time. The PRMs, once established they are used heavily as reference for all construction survey work for the duration of a mega contraction project of 5-10 years with no maintenance, while governmental  geodetic control require regular geodetic maintenance done typically by subject matter experts. Recently, Navmatica has completed a number of Geodetic Control Establishment to serve large construction projects in the Kingdom of Saudi Arabia, United Arab Emirates and Oman. An example of these projects is the Riyadh Metro Project where Navmatica established over 600 geodetic Control. Geodetic control (the so called PRMs) has a number of orders as well; namely, Primary, Secondary and Tertiary as per the Construction industry verbiage. Each of these reference markers has a dedicated function. Surprisingly enough, the highest order which is the primary (PRM) does not necessarily have the highest accuracy while those of lower orders (namely secondary and tertiary) have higher accuracy requirements than those of the primary. The justification is that, the secondary and tertiary Reference Markers are used in laying out the metro tracks which require ultra-relative positioning precision. Navmatica has completed the project for two main consortia in the Riyadh Metro project namely, BACS and FAST which are responsible for Lines 1,2,4,5 and 6 of the project. Accuracy requirements were at a few mm in both horizontal and vertical. The project requirements for density and locations resulted in odd-shaped geodetic networks that imposed a special challenge from the network adjustment perspective. The heavy Riyadh Metro Project Construction taking place across the city while establishing the network and acquiring the data introduced new challenges to filed work for GNSS and precise leveling. The nature of region and its associated influence on GNSS signals introduced additional challenges in designing the workflow, networks, and field procedure. This paper presents the entire process of establishing geodetic control (PRMs) for Mega Construction Projects including, design of Monuments, design of the geodetic networks, data acquisition workflow, data processing workflow, QA/QC workflow, and network adjustment strategies and alternatives. Datum implications are highlighted in this paper. The nature of this project and its associated field and office challenges are highlighted in some detail. A dedicated Data processing workflow has been developed and will be demonstrated in detail. The accuracy achievable for horizontal and vertical components will be presented in some detail. Different technical challenges and their associated influence on either data acquisition, data processing or network adjustment are demonstrated through the Riyadh Metro Project abundance of geodetic data.

 

 

Paper 2:  Mobile Mapping for Mega Construction Projects

Mohamed MR Mostafa and  Vi Huynh

 

Abstract

 

Mobile Mapping Systems acquire multiple streams of positioning and imaging data. They typically consist of a positioning component that includes a GNSS/Inertial integrated systems and an imaging component that nowadays include multiple cameras and multiple laser scanners. Recently Navmatica has completed a number of mobile mapping projects to serve large construction projects. An example of these projects is the Riyadh Metro Project where Navmatica produced precision 3D Topo maps using an Optech Lynx SG mobile mapping system. The project size covered almost the entire city of Riyadh where over 500 linear kilometers were surveyed around the city. Data acquisition took place in December 2014. The final 3D Topo maps included 3D CAD with over 50 CAD layers, densely spaced Spot heights, Digital Terrain Model, contours. In this paper, a detailed insight into the project planning, data acquisition, data processing, calibration and quality control is presented. The nature of this project and its associated challenges onsite and in the office are highlighted in detail. A dedicated Data processing workflow has been developed and will be demonstrated. Positioning accuracy of 3D objects in the final 3D CAD models are analysed every step along the way of executing this project and presented in some detail.

 

Paper 3:  Indoor Mapping – State of the Art and New trends

Mohamed MR Mostafa

 

Abstract

 

Indoor Mapping is becoming a significant new application in the geospatial industry around the world. The multi-disciplinary geospatial technologies allow the integration of sensors now to produce systems capable of mapping the indoor environment of any type of building with high precision. On one hand, BIM includes a full design model of new buildings. BIM came a long way over the past few years and has been becoming a procedure in some parts of the world. On the other hand, Indoor mapping provides the as-built for any BIM. Indoor mapping helps now is many market verticals including, Security, Construction, and Oil & Gas. Currently, the typical attempts at indoor mapping are done using systems that include an imaging technology such as a laser or a camera. Such systems are almost obsolete due to the lack of resolution, precision and the long, inaccurate and tedious operation used in order to produce an indoor map. Such systems still exist in operation due to the typical market confusion that usually takes place when a new technology is born. The Authors have been involved in the development, testing, and analysis of the most technologically advanced indoor mapping systems around the world. The most successful indoor mapping systems nowadays include two components, namely: 1) Navigation Component 2) Imaging Component. The navigation component usually includes precision inertial/Distance Measurement Instrument Integration to freely operate in the indoor environment. The imaging component usually includes a 360 panoramic camera integrated with a LiDAR. The navigation and imaging components are usually integrated using industry standard direct georeferencing technology in order to position every single point in the indoor environment in 3D space with the highest possible absolute accuracy. This paper introduces the underlying concepts of the modern Indoor mapping systems in a detailed technical description showing the mathematical modelling, the different system components, their technical specifications, calibration methods, and data processing and QC workflows. This presentation also introduces the different applications that the Authors have used the indoor mapping systems for in the United States and Canada. Some real life examples are demonstrated where the technical details are introduced, the logistical challenges are highlighted and the achievable products along with their associated accuracy are presented.

 
 

About Navmatica

Since 2003, Navmatica Corporation has been focused on Geospatial service provision and custom software development for the Geomatics industry. Our experience covers Geodetic Positioning, Airborne Mapping, Mobile Mapping, and Indoor Mapping. We are experts in the design of mapping workflows, system integration, and delivering end-to-end projects from primary data acquisition to final map production. Furthermore, we offer on-site training courses for caliber building purposes. For more information please contact us:

  • info@navmatica.com
  • Head Office – Toronto, Ontario, CANADA at +1.647.777.7911
  • Regional Branch – Dubai, UAE at +971.4.422.6920