A disruptive technology which revolutionised the manner in which remote sensing data can be acquired using Unmanned Aerial Vehicles (UAV’s) and “beefed-up” conventional photogrammetric processing to deliver fit-for-purpose data products.  Whilst generally relatively cheaper and having a much quicker turn around time compared to Digital Aerial Photography and LiDAR surveys, it renders less accurate survey data products (absolute accuracy).    Ideally to be employed on small areas with no vegetation and/or with survey product requirements which doesn’t require a high level of absolute accuracy.

KEY BENEFITS

  • Ideally suited for small areas / short corridors and sparsely vegetated areas

  • Derive engineering grade accuracy survey data products as long as the area is small and very little – non-vegetated areas

    • Relative Accuracy – high,
    • Absolute Accuracy – low.
    • Planimetric Accuracy – from 3cm (1cm GSD) up to 15cm (10cm GSD) RMSE
    • Vertical Accuracy – from 5cm (1cm GSD) up to 12cm (10cm GSD) RMSE

  • Relative quick turn round time subject to specific survey data deliverable requirements;

  • Our survey data deliverables can easily be integrated with all engineering design – and cad software

TYPICAL APPLICATIONS

Typical applications will comprise the following (but not limited to):

  • High Resolution Aerial Imagery

  • Infrastructure Inspections

  • Disaster Management

    • Planimetric Accuracy – from 50cm (31cm GSD) up to 10m RMSE (subject to the fixing of post identification of survey control)
    • Vertical Accuracy (DEM / DSM) – from 50cm up to 30m RMSE

  • Security – surveillance of medium to large size areas / corridors

  • Infrastructure Inspections on inaccessible / hard-to-reach structures

  • Powerline / Towers Inspections

  • Thermal mapping of infrastructure

  • Real-time / Progressive video feedback of construction / maintenance operations

  • Accurate Volumetric surveys of stockpiles / open pit mining areas

  • High Resolution Ortho-Imagery of small areas

  • Wildlife / Game counting

  • Antipoaching support services

TYPICAL DELIVERABLES

Trail Surveys offers the following typical survey deliverables for remote sensing surveys:

PHASE OF THE SURVEY DESCRIPTION SURVEY DATA DELIVERABLE FORMAT IN WHICH DATA CAN BE DELIVERED
FORMAT #1 FORMAT #2 FORMAT #3
Survey Control Co-ordinate List (only) Soft Copy File MS Excel PDF ASCII Txt
Co-ordinate List included in Survey Report Soft Copy File MS Word PDF
Separate Survey Control Report Soft Copy File MS Word PDF
Remote Sensing Surveys Digital Terrain Model (DTM) Point Data ASCII Txt (AutoCAD) .DWG .DXF
Triangles / Surface File Modelmaker.tot Civil Designer.cdm Land XML
Tile Index (If Applicable) (Microstation) DGN (AutoCAD) .DWG .DXF
Contours 3D Un-smooth, Labelled (Microstation) DGN (AutoCAD) .DWG .DXF
Contour 2D Heat Map JPEG PDF
Ortho-Imagery Georeferenced Ortho-Imagery ECW GEOTIFF JPEG
Tile Index (If Applicable) (Microstation) DGN (AutoCAD) .DWG .DXF
LiDAR Data Unfiltered LAS Pointcloud ASCII LAS
LAS: Ground + Non-ground LAS ASCII Txt
LAS: Services LAS ASCII Txt
LAS: Water LAS ASCII Txt
LAS: Buildings LAS ASCII Txt
LAS: Vegetation (Primary) LAS ASCII Txt
LAS: Vegetation- Sub-classes LAS ASCII Txt
LAS: Full Intnl Standard LAS ASCII Txt
Videos Fly-through Video AVI MP4 WMF
Point Cloud Processed Point Cloud Data ASCII Txt LAS .BIN
Detail Line Mapping (Vector) 2D Drawing (Microstation) DGN (AutoCAD) .DWG PDF
Long Sections (Microstation) DGN (AutoCAD) .DWG .DXF
Cross-Sections (Microstation) DGN (AutoCAD) .DWG .DXF
Sections (Other) (Microstation) DGN (AutoCAD) .DWG .DXF

REQUIRED INFORMATION FOR OFFICIAL QUOTE

We understand that every project, site and client is different – as are their expectations of the required survey deliverables.  In order to “sharpen the pencil” and offer you the most cost and time effective geomatics solution, fit for the purpose you require the survey, we would need to acquire the following information from you:

  • Location of the survey – ideally a “Google Earth Placemark” send to us in kml/kmz format

  • The purpose of the survey – this serve as an indication of the required level of accuracy required

  • Required accuracies (planimetric and vertical)

  • Specific detail which need to be surveyed

  • In the case of a LiDAR survey – required LAS classification (typical run-of-the-mill applications require only Ground and Non-Ground LAS classes)

  • Details on the presentation of the survey data

    • Hardcopy / Softcopy
    • CAD Specifications / Drawing Layout
    • Digital data formats required for integration into your design / cad software

  • Specific logistic constraints getting access to the specific area of interest

  • SHEQ Requirements (Medicals / inductions / onboarding / PPE / Mine-ready vehicles etc)

  • Schedule / Program – Should a staggered delivery be required we can work with you to provide critical data at key dates throughout your project.