Cadastral Surveying

Clarke Surveyors Incorporated are licensed to practice cadastral surveying, as defined in Section 1 of the Surveyors Act, means " advising on, reporting on, conducting or supervising the conducting of surveys to establish, locate, define or describe lines, boundaries or corners of parcels of land or land covered with water;" The licensed Ontario Land Surveyor, (Clarke Surveyors Incorporated) provides a professional opinion on the location of boundaries, using historical research, a knowledge of statute and common law, and the latest technology in measurement and data processing. Only licensed members of the Association of Ontario Land Surveyors like Clarke Surveyors Incorporated can carry out cadastral (legal boundary) surveys in the Province of Ontario.

Geodetic Surveying

This is the science of locating and relating the position of objects on the earth relative to each other, while taking into account the size, shape and gravity of the earth. This type of survey is suited for large areas and long lines and is used to find the precise location of basic points needed for establishing control for other surveys. Horizontal and vertical networks that span the country form the primary spatial reference system used in mapping, boundary demarcation, and other Geomatics applications. Practical applications of geodesy include monitoring earth movement and determining the precise location of points on the surface of the earth, for use in satellite tracking and global navigation.

Ontario Land Surveyors have expanded their geodetic services by using new technology, including specialized software, the Global Positioning System (GPS), Interferometric radio astronomy and precise gravity observations.

The Base station for Southern Ontario for the Sokkia PowerNET! GPS Base Station Network is located at Clarke Surveyors Incorporated office

*As part of the ongoing effort to provide our valued customer base with leading edge and economical measurement solutions, SOKKIA has taken the initiative to setup a GPS reference station network covering South Western/Central Ontario, initially and ultimately expanding to cover Eastern and Northern Ontario. Sokkia supplies state-of-the-art, dual-frequency GPS products for the survey industry. SOKKIA GPS is produced through a joint venture between NovAtel Inc. of Calgary, Alberta and SOKKIA Co Ltd of Japan. The reference station network involves installation of dual frequency GPS receivers across the province, typically 40 to 60 km apart each wired to a high speed internet connection. The GPS hosts raw GPS data on a static IP address and this data is accessed from a central server. The server in turn compiles this data, creates correction messages and relays the corrections to cellular enabled GPS Rovers in the field. SOKKIA's GSR2700 ISX is a 72-channel dual-frequency GPS/Glonass receiver with internal cellular modem.
*Taken from Sokkia Canada Website.

Photogrammetric Surveying

Photogrammetric surveyors specialize in the science of obtaining reliable spatial information from photographic images. Photogrammetrists analyze aerial and terrestrial photographs to obtain information about physical objects and the environment. The most common utilization of photogrammetry is in the production of base maps from aerial photography. Mapping generated using photogrammetry provides a cost-effective method of establishing an accurate digital base for such things as urban planning, terrain analysis and forest management. Photogrammetry can be used for landfill or gravel pit monitoring, determining the location of ore bodies or determining proposed locations for utilities, such as pipelines and transmission lines.

There are also many uses for non-aerial or close-range photogrammetry. These include digital modeling for architectural restoration, medical imaging for forensic sciences and reconstructive surgery, data collection for structural stability studies of bridges and hydroelectric dams, and the documentation of traffic accidents and crime scenes by police departments.


Global Position System (GPS) Services

Clarke Surveyors is experienced in all phases of GPS and conventional survey techniques. Our survey capabilities include all phases of survey including:

  • photogrammetric mapping control
  • boundary
  • ALTA surveys
  • ROW surveys
  • topographic
  • drainage
  • utility corridor
  • construction
  • environmental
  • mining
  • GPS control.

With our affiliate company, we can provide GIS quality ground control to engineering-grade accuracy specifications.


Applications of Geographic Information Systems (GIS)

GIS is not just an improved, digital version of the traditional paper map, it is much more. GIS involves the collection and analyzing of spatial and other data as they relate to specific geographic entities, rather than simply displaying them on a map. The data related to a property might include the lot area, address, owner's name, type of house, number, age and gender of occupants, school support, assessment value, type of soil and so on. Intelligent use of this data makes GIS a very powerful tool.

Some of the applications are:

  • transportation applications, which allow the efficient movement of goods and services
  • environmental and natural resources applications, which allow the measurement, monitoring, modeling and management of the environment and our natural resources
  • government applications, which allow improvement of the quality of products, processes and services by using resources more efficiently

See http://www.aols.org/single.asp?itemcode=AOLS-BYL-TSP