Sequoia Drone Systems

DRONE INTELLIGENCE · BC INTERIOR

We fly drones, collect PPK-corrected GNSS data, and process it into orthomosaics, 3D point clouds, and DXF files — ready for AutoCAD Civil 3D on day one.

✓ DXF + CAD Ready✓ PPK Verified ±2cm✓ AutoCAD Civil 3D

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WORKFLOW

Emlid RS3 → Pix4D → Civil 3D

DJI Mavic 3 Enterprise RTK in flight at survey construction site

VERIFIED FIELD ACCURACY

0.43"

RMS — M3E RTK + GCPs

DroneDeploy 2023

Accuracy validated by:

DJI EnterpriseEmlid PPK/RTKPix4D PipelineAutoCAD Civil 3D

Core Disciplines

What We Deliver.

Every flight produces survey-grade, CAD-ready outputs formatted for your existing engineering workflow.

Survey & Engineering

PPK-corrected aerial data processed into CAD-ready deliverables for engineers and land surveyors.

OUTPUTS

→ Orthomosaic Map (GeoTIFF)→ DXF Feature Extraction→ TIN Surface + Contour Lines→ AutoCAD Civil 3D Compatible

Real drone orthomosaic survey map top-down view

Environmental Intelligence

Multispectral and thermal imaging for forestry, agriculture, and environmental compliance in BC.

OUTPUTS

→ NDVI / Multispectral Index Maps→ Canopy Health & Biomass Reports→ Time-Series Change Detection→ Environmental Compliance Docs

Aerial survey site with checkpoint markers

LiDAR Indoor Scanning

Handheld Leica BLK2GO scanning delivers BIM-ready point clouds for buildings and structures.

OUTPUTS

→ 3D Point Cloud (LAS/LAZ + E57)→ BIM-Ready Files (Revit / IFC)→ As-Built Floor Plans (DWG)→ IFC / RCP Export

DJI Mavic 3 Enterprise hardware close-up

All deliverables: DXF · DWG · GeoTIFF · LAS/LAZ · E57 · IFC

THE PROCESS

From Site to Deliverable.

A proven 4-step pipeline that produces centimeter-accurate CAD files your engineering team can use immediately.

Autonomous lawnmower flight plan pattern

Flight Planning

We define the survey boundary, set 80/70 image overlap, configure shutter speed, and plan the autonomous polygon mission.

DJI Pilot 2DJI Mavic 3 Enterprise

75/65 overlap · 120–200ft AGL

PPK Ground Control

Emlid RS3 base station is set up over a known NGS monument. Raw GNSS data is logged simultaneously with the drone flight.

Emlid Reach RS3NGS Monument

GCP RMS: 1.02cm

RMSE checkpoint accuracy table from field study

Data Processing

Emlid Studio applies PPK corrections to image geotags. Pix4Dmatic runs photogrammetry to generate DSM, point cloud, and orthomosaic. Accuracy verified via RMS error report.

Emlid StudioPix4DmaticPix4Dsurvey

RMSE X:0.35" Y:0.34" Z:0.28"

CAD Deliverables

Vectorized features and surface models are exported as DXF files for immediate use in AutoCAD Civil 3D.

Pix4DsurveyAutoCAD Civil 3D

< 1 inch RMS · DXF in 48hrs

FEATURED PROJECT

Topographic Survey — BC Interior

Using PPK-corrected drone imagery and Pix4Dmatic photogrammetry, we produced a complete topographic deliverable accurate to ±2cm — ready for AutoCAD Civil 3D within 48 hours of the final flight.

0.43"

Best RMS Accuracy

1.02cm

GCP Base Station RMS

48hrs

CAD Delivery

DXF ExportOrthomosaicPoint CloudCivil 3D

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