Surveying and Mapping

WestLAND Group’s surveying and mapping capabilities are second to none. Complete and accurate surveys and mapping information lay the foundation for all subsequent design and construction work and WestLAND Group’s capabilities and adoption of technological advances are always on the forefront of taking the survey and mapping profession to the next level.

WestLAND Group is transforming the way surveying work is done through the adoption of innovative technologies, providing real efficiencies and cost savings by enhancing data capture, analysis, and presentation process. The future is here and WestLAND Group is at the forefront of this technology providing an abundance of innovative and creative solutions for our clients.

SERVICES

  • Boundary Surveys and Property Analysis
  • A.L.T.A. Surveys, Title Review
  • GPS/Geodetic Surveys
  • Record of Survey
  • Tentative and Final Maps
  • High Precision Control Surveys
  • Environmental Mapping
  • 3D LASER SCANNING / LiDAR
  • Certificates of Compliance
  • Design Topographic Surveys
  • Aerial Surveys
  • Digital Ortho Photos
  • Deformation Studies
  • Utility Investigation/Potholes
  • UAV Inspections Services
  • Hydrographic Surveys
  • As-Built Surveys
  • Monumentation
  • 3D Modeling/Earthwork Calculations
  • Right-Of-Way Engineering
Client: City of Irwindale
Client: City of Irwindale Location: Irwindale WestLAND Group performed numerous mining pit surveys as part of an on-going effort to support the mining engineering group within the City of Irwindale. WestLAND performed research and mission planning and established aerial control for photogrammetric and bathymetric surveys, including GPS/GNSS surveys and conventional surveying techniques. With the use of a dual frequency echo-sounder we were able to accurately produce a lake bottom profile that was used to estimate under water material extraction quantities. Irwindale-3 Topographic and Boundary survey maps were prepared for eleven open mining pit locations within the city. WestLAND office personnel generated digital terrain models (DTM’s) at each location and performed quantity/volume calculations for the city to verify the amount of material removed in a year over year comparison. The client also required detailed slope analysis for which our in-house staff created color-coded slope exhibit maps used to identify slope areas that were out of compliance with specified slope stability and safety requirements. As an additional service we prepared finished surfaces for future mining pit reclamation; used to calculate fill volumes that will be required during mine close-out procedures. Digital survey data and mapping deliverables were also exported into a GIS deliverable format, including shape files and geodatabase files to be incorporated into the city GIS system.
Client: Layton Construction
This construction project included reviewing civil, architectural and structure plans and generating RFIs for any discrepancies found with regards to the building layout. WestLAND survey crews established horizontal and vertical survey control throughout the site and provided multi-story building control lines and elevations for the construction of this 6-story hospital building located in the City of Murrieta. WestLAND also prepared various as-built surveys to check concrete floor deflections and structural steel.
Client: City of Rancho Cucamonga
This 2 mile drainage rehabilitation project along Hellman Ave., included reviewing civil and structural plans with regards to the design, established horizontal and vertical survey control throughout the project, monumented street centerlines, and provided control lines and elevations for the construction of the improvements. WestLAND also prepared various as-built surveys to verify design along the route and our field engineers prepared additional designs to fit field conditions.
Client: Sanitation Districts of Los Angeles County
The Sanitation Districts of Los Angeles County contracted the WestLAND Group to provide high resolution surveying and scanning of the Los Coyotes Water Reclamation Plant in Cerritos. The underground galleries needed to be mapped at a precision high enough for their engineers to perform electrical conduit routing designs and conflict analysis. The WestLAND survey crews tied into existing 3D site control, established new control underground and scanned approximately 550 feet of tunnels and galleries in one day rather than the estimated 5 to 6 days using traditional survey techniques. WestLAND personnel then took the raw data from 27 scans, brought it into FARO Scene software registering the 3D point cloud to meet the 6mm (0.02’) precision, and exported the required POD and E57 files for the clients use. A full survey control report accompanied the large data set on a thumb drive for delivery. The final product is saving the client numerous expensive trips to the field to capture measurements; now the client simply opens the 3D point cloud and makes measurements at their desk.
BNSF Railroad, J.L. Patterson
This construction project included reviewing civil, architectural and structural plans and generating RFIs for any discrepancies found with regards to the bridge layout. WestLAND survey crews established horizontal and vertical survey control throughout the site and provided control lines and elevations for the construction of the overpass, located in the City of Vernon. WestLAND also prepared various as-built surveys to check concrete and structure deflections.
HIGH DEFINITION SURVEING
WestLand Group has been providing scanning solutions to its clients since 2002 supplementing survey total stations with High Definition Scanning systems. Scanning technology has evolved into a highly reliable efficient and effective means of collecting measurements to prepare drawings and create 3D models. Reliable designs and as-builts require an accurate representation of exisiting conditions. A single High Definition Survey or 3D Laser Scan builds an accurate foundation that enhances spatial representation. Our 3D laser scanners collect points to produce a very dense and accurate collection of individual measurements known as a “point cloud”. HD scanning can measure existing buildings inside and out, pipelines, substations, bridges and topography. HD scanning results in 2D or 3D CAD model, which can be a reliable starting point to test and verify the accuracy of spatial information.
Client: Hanson Aggregates
For this project we were afforded the opportunity by one of our clients to provide a verification survey and prepare stockpile volume calculations for an aggregates stockpile that was incomplete in the data set returned from a mobile lidar survey that had recently been conducted. Early in our planning we recognized the opportunity to both deploy our UAV in conducting the field work and to perform a comparison between data collected using terrestrial laser scanning and data generated from aerial photogrammetry (obtained using our in-house UAV system). In addition to preparing volume calculation for the approximately 50,000 cubic yard stockpile (see photo below) that was requested by the client, we selected a relatively small stockpile (about 6,000 cubic yards) to perform the comparison survey. As part of the data comparison process, we set numerous control check points that were surveyed with a total station and RTK GPS. These control points were then captured as part of the laser scanning control and as control targets visible in the UAV photography. The data was reviewed, analyzed and processed back in the office, then we generated a TIN surface of the stockpile from each data set. When we compared the final results of the stockpile volumes we realized that the results obtained from the photogrammetry were superior to that obtained from laser scanning. It was apparent that the aerial view provided a more complete surface, revealing irregularities covering the top surface of the stockpile that could not be captured by the laser scanner that was setup on the ground. Utilizing UAV’s for stockpile volume calculation projects is quickly becoming the industry standard. This approach results in obtaining more complete data in a shorter amount of time as compared to terrestrial scanning, mobile lidar or other more traditional methods.