RPAS / UAV and LiDAR Surveying

N.E. Parrott Surveys Limited (NEPSL) is a leader in advanced RPAS/UAV (Remotely Piloted Aircraft System/Unmanned Aerial Vehicle) operations and LiDAR data collection. Using UAV photogrammetry and LiDAR technology, our team efficiently captures high-density spatial data across large, remote, heavily vegetated, and complex project sites. 

NEPSL has extensive experience providing high-accuracy aerial survey services, achieving precision in X, Y, and Z coordinates to within approximately 3 cm, with a ground resolution of approximately 2.9 cm per pixel when flown at 122 m (400 ft) above ground level.  LiDAR technology further enhances our capabilities by collecting precision elevation information and supporting detailed surface, terrain, vegetation, and infrastructure analysis. 

Key Projects:

N.E. Parrott Surveys Limited has undertaken a wide variety of projects, including:

·        Stockpile Surveys and Volume Calculations: Accurate measurements of stockpiles, excavations, and material quantities for inventory                     management and project planning.

·        Gravel Road Surveys: Collection of detailed surface and terrain information for pre-engineering, road rehabilitation, and upgrading gravel               roads to asphalt.

·        Tailings Discharge Surveys: Pre-engineering surveys supporting dyke-system design, pipe advancement, and the monitoring of tailings-                 management infrastructure.

·        Apron Feeder Doghouse Inspections: A safer and more efficient alternative to conventional confined-space inspections.

·        Apron Feeder Liner Inspections: Detailed aerial inspections within ore-storage areas to support maintenance planning and operational                   decision-making.

·        Quarry Management: Aerial imagery, LiDAR data, surface models, and volume calculations used to support quarry planning, monitoring,               and operational optimization.

·        Transmission Line & Sub-station Surveys: Detailed surveys of high-voltage transmission lines and substations for vegetation-clearance                 assessment, line-sag calculations, infrastructure mapping, and infrared inspections.  These services help identify hotspots, deterioration,             clearance concerns, and other potential issues before they become critical.

 ·       LiDAR Mapping and Terrain Modelling: High-density elevation data collected for topographic mapping, engineering design, drainage                       analysis, corridor mapping, vegetation assessment, and the creation of detailed digital terrain and surface models.

Deliverables:

Depending on the project requirements, NEPSL can provide:

·        Georeferenced Orthomosaics: High-resolution aerial images accurately stitched and mapped to real-world coordinates.

·        LiDAR and Photogrammetric Point-Clouds: High-density three-dimensional datasets for measurement, analysis, engineering, and design.

·        Classified LiDAR Data: Point-cloud data classified to identify ground surfaces, vegetation, buildings, utilities, and other features.

·        3D Meshes and Models: Detailed three-dimensional representations of project sites, structures, and infrastructure.

·        Digital Surface Models and Digital Terrain Models: Detailed elevation models supporting engineering, environmental assessment, drainage           analysis, and site planning.

·        Contour Mapping: Contour lines generated from LiDAR, DSM, or DTM data for design and planning applications.

·        Volume Calculations: Accurate measurements of stockpiles, excavations, cut-and-fill quantities, and other material volumes.

·        Planimetric and Topographic Mapping: Detailed mapping of terrain, infrastructure, utilities, access routes, and site features.