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Control Surveys Photo Control KGPS for Aerial Photography Survey Data Analysis Geodetic Consulting GIS Data Collection Health & Safety |
Check out our Geographic Résumé for a graphical index of our experience. GPS Control Surveys Control surveys provide a spatial framework for land-based infrastructure and development. This involves the design and establishment of discrete points on the surface of the earth, survey observations connecting them, data processing and analysis and publication of coordinate results. Global Positioning System (GPS) technology is used as the primary tool in completing survey observations for control networks. Network design, data processing and analysis are accomplished with application software. All of these functions require specialized knowledge and a high level of capability. Most control survey projects are completed for public sector clients, including federal agencies, provincial ministries, and municipalities. Significant challenges remain in the field of GPS positioning. These include the ability to provide high-accuracy elevations with the use of GPS and the process of moving governments and utilities to a common, globally consistent datum. The personnel of Everest Geodetics have accrued significant experience in this area having completed work for:
Photo Control Surveys Accurate maps and mosaics can be created from aerial photography. Two overlapping photographs can be viewed in stereo (3 dimensions) with the aid of optical devices and more recently, computers. If a series of photographs are taken, an entire area can be mapped. In order for that data to correspond precisely to the ground, however, registration points with precise coordinates are used. Points are identified in the photo model by stereo operators and photo coordinates are determined. Surveying is then used on the ground to determine ground coordinates for the same points. GPS is the primary method for determining the ground coordinates of these registration (or photo control) points.  Everest Geodetics uses both static and kinematic GPS techniques to determine coordinates of photgrammetric ground control. Aerial mapping is used by engineering companies, forestry, pipeline, planners and government agencies including Ministries of Transportation and Natural Resources as well as Natural Resources Canada. Support for KGPS Aerial Photography GPS-controlled aerial photography involves the provision of photo centre coordinates not through traditional aerial triangulation, but directly, by means of kinematic GPS. By referencing the aerial camera perspective centre to an airplane-mounted GPS antenna, the position of the camera can be determined at regular intervals. The position of the camera at the instant of exposure can then be determined by means of interpolation.  While, ideally, the use of this method would eliminate the use of photo control on the ground (targets or photo-id points), sparse targeting continues to be used to determine local datum transformations and for quality assurance purposes. Use of GPS-controlled aerial photography reduces the amount of ground control required by 80% to 98%. A great advantage is that projects can be estimated according to a fixed number of ground control points, regardless of the scale of the photography. It would be reasonable to state that all large photo blocks flown today are flown in this manner. New developments in this field include the integration of Inertial Navigation Systems (INS) with GPS in order to provide exterior orientation parameters, phi, omega & kappa. Everest Geodetics provides support to air photo companies engaged in GPS-controlled aerial photography. Activities include:
Survey Data Analysis GPS is a geodetic tool by virtue of the fact that geodesy provides the foundation for the composition and operation of the system. The geodetic applications of GPS are high-end but compose only a small fraction of what GPS can be used for. GPS is more often used as a tool to support other disciplines, even within land surveying. Despite the fact that hardware has become very easy to use, an understanding of geodesy is often necessary in order to be able to analyze and qualify the data which results from using GPS. Everest Geodetics provides data analysis services to those who use GPS to collect positional data. Applications include:
Geodetic Consulting For surveyors taking on larger projects, new sets of problems and tasks arise. This is particularly the case when dealing with agencies ranging from local municipalities to the federal government. Projects may have special geodetic requirements pertaining to data, methodology and deliverables. Everest Geodetics provides consulting services and can overcome problems involving geodesy and the surveyor's daily practice. Applications include:
GPS for GIS Data Collection GIS requires the attribute tagging of spatial data. GPS is a fast way to associate spatial data to the attributes; however, numerous issues affect the way data is collected and stored. Everest Geodetics provides data collection and GPS expertise for companies involved in GIS. Applications include:
Health & Safety The health and safety of personnel involved in our projects is very important to Everest Geodetics . The following is our company policy: EVEREST GEODETICS is committed to health and safety in the workplace – both in the office and in all its field operations. EVEREST GEODETICS will adhere to all applicable statutes and regulations that pertain to health and safety in the workplace. EVEREST GEODETICS will provide the materials and resources required to meet health and safety requirements. EVEREST GEODETICS will give notice to staff and consultants who operate in an unsafe manner. Further, EVEREST GEODETICS expects all staff and consultants to report unsafe conditions. We welcome and support employees' safety suggestions and comments. Please join us in promoting health and safety in the workplace. Robin L. Fleguel, B.Sc., O.L.S. , O.L.I.P. President 
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