Toronto Land Surveyors Inc.
Are used to identify and map the contours of the ground and existing features on the surface of the earth or slightly above or below the earth's surface (i.e. trees, buildings (internal and external), streets, walkways, manholes, utility poles, retaining walls, etc.). If the purpose of the survey is to serve as a base map for the design of a residence or building of some type, or design a road or driveway. Topographic Surveys may require "bench marks" to which ground contours are related, information regarding surface and underground utilities.
A measured building survey is an accurate representation of your building showing all the structural elements and architectural features. Floor plans are essential to give an accurate representation of the building and this is backed up with elevations and cross sections presented as a scaled survey drawings. Using our sophisticated surveying equipment, we will visit the site to capture the site data and then process the information in AutoCad at our office in Brampton, Ontario.
Construction surveying or Construction Layout (otherwise known as "staking", "stake-out", "lay-out" or "setting-out") is to stake out reference points and markers that will guide the construction of new structures such as roads or buildings.These markers are usually staked out according to a suitable coordinate system from Autocad design selected for the project.
As build Surveys
Construction as-builts are used to show the finished condition of the work as it was actually constructed and accepted. The as-built documentation is a usual and important requirement of construction contracts, and the process requires that any change that modifies the original design be incorporated by drafting the change upon one set of contract documents earmarked just for that purpose.
Uses for Digital Terrain ModelsVolumetric survey data collected in the field can be processed to form a 3D Digital Terrain Model (DTM). The resulting DTM can form the basis for volume calculations, surface area measurements, contours and cross sections.Reason for Volumetric Surveys; Established volumes can be used for a variety of purposes such as quantifying crushed or excavated materials. Cut and fill exercises can then be undertaken to balance earthworks.Benefits of Volumetric Surveys and Digital Terrain ModelsThe data contained in the computer generated Digital Terrain Model is extensive and eliminates the need for difficult and laborious calculations, previously done by hand, this saving you time and money.
The accuracy of the output volumes is of benefit in establishing quantities for tendering in the building and civil engineering fields, ensuring the tender submitted has the best chance of returning a profit. If you want to discuss your volumetric survey requirements in more detail then please do not hesitate to contact us.
GPS STANDS FOR GLOBAL POSITIONING SYSTEM GPS is a highly accurate navigation system using signals from satellites to determine a location on the Earth’s surface, irrespective of weather conditions. It is dependent on GPS satellites high above the Earth which transmit signals containing the time and location of the satellite. Any ground-based receiver which receives signals from four or more GPS satellites can use navigation equations to calculate its location on the Earth’s surface. Constant signaling can then update speed and direction information for moving receivers.GPS was originally developed for military use but since the 1990s has been open for civilian use and is now used in such common applications as mobile phones, car navigation systems, and of course surveying and mapping.
The core components of project management are:
defining the reason why a project is necessary;
capturing project requirements, specifying quality of the deliverable, estimating resources and timescales;
preparing a business case to justify the investment;
securing corporate agreement and funding;
developing and implementing a management plan for the project;
-leading and motivating the project delivery team;
-managing the risks, issues and changes on the project;
-monitoring progress against plan;
-managing the project budget;
-maintaining communications with stakeholders and the project organisation;
-closing the project in a controlled fashion when appropriate.
HOW IS GPS USED IN SURVEYING? Surveying and mapping was one of the first commercial adaptations of GPS, as it provides a latitude and longitude position directly without the need to measure angles and distances between points. However, it hasn’t entirely replaced surveying field instruments such as the theodolite, Electronic Distance Meter, or the more modern Total Station, due to the cost of the technology and the need for GPS to be able to ‘see’ the satellites therefore restricting its use near trees and tall buildings.
In practice, GPS technology is often incorporated into a Total Station to produce complete survey data. GPS receivers used for base line measurements are generally more complex and expensive than those in common use, requiring a high quality antenna.There are 2 methods of GPS measurement that are utilised by surveyors.
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Static GPS BaselineStatic GPS is used for determining accurate coordinates for survey points by simultaneously recording GPS observations over a known and unknown survey point for at least 20 minutes. The data is then processed in the office to provide coordinates with an accuracy of better than 5mm depending on the duration of the observations and satellite availability at the time of the measurements.
Real Time Kinematic (RTK) ObservationsThis is where one receiver remains in one position over a known point – the Base Station – and another receiver moves between positions – the Rover Station. The position of the Rover can be computed and stored within a few seconds, using a radio link to provide a coordinate correction. This method gives similar accuracy to baseline measurements within 10km of the base station.
• Civil and earthworksIncluding bulk earthworks for roads, subdivisions and dams
• Structures Including high rise buildings, bridges, minerals processing plants and infrastructure
• Linear infrastructureIncluding roads, pipelines, telecommunications and power
• As constructed and audit surveysFor buildings, structures, sewer, water, drainage and underground services
• Feature surveys for project design