Services
GruntworX provides aerial data collection and GIS analysis for clients who need survey-grade, measurable products. Services can be scoped individually or combined on a single mobilization. There are no published rates; pricing is project-specific, based on the site conditions, accuracy class, and deliverables you need. Email us for details.
Our data is prepared to meet ASPRS Positional Accuracy Standards, Version 2.0, and to support engineers and surveyors. It is not a licensed or PSM-sealed survey. See Accuracy & Process for how we work and for the full statement.
LiDAR and topographic mapping
What it is
Survey-grade UAS LiDAR capture for sites that need an accurate three-dimensional model of the ground and above-ground features. We collect a dense point cloud, classify it, and derive the terrain products engineers and contractors use for design, earthwork, and site planning.
Who it is for
Civil and consulting engineers, contractors, developers, and land managers who need topographic mapping, existing-conditions models, or a measurable base for design — and do not require a PSM-sealed survey.
Aerial photogrammetry and orthomosaics
What it is
High-resolution aerial imagery collected with a full-frame photogrammetry camera and processed into a georeferenced orthomosaic or delivered as raw frames. This is the basemap and progress-documentation product for sites that need clear, measurable imagery rather than a LiDAR point cloud — or in addition to one.
Who it is for
Engineering firms, contractors, and developers who need current site imagery, construction progress documentation, or an orthomosaic that can be brought into GIS or used alongside design files.
Ground control and accuracy verification
What it is
Establishment of ground control points, independent checkpoints, and additional control using a multi-band GNSS RTK/PPK base and rover, numbered ground targets, and LiDAR-reflective targets where appropriate. This is how we tie aerial data to real-world coordinates and how we document whether a project meets an agreed ASPRS accuracy class.
Ground control can be scoped with a LiDAR or photogrammetry mission, or scoped as a stand-alone control and verification effort.
Who it is for
Clients and licensed professionals who need the positional foundation under a mapping product, or a documented accuracy assessment they can keep in the project file.
Hydrological analysis
What it is
Derived hydrologic mapping from a LiDAR-based digital elevation model. We generate flow direction, flow accumulation (pooling zones), and stream-network layers that civil and drainage engineers can bring into their own software.
This service is typically added to a LiDAR topographic project. If you already have a suitable elevation model, ask about analysis-only scoping when you email us.
Who it is for
Civil engineers, drainage designers, developers, and environmental consultants evaluating surface drainage, ponding, or stream networks.
Multispectral vigor analysis (NDVI / NDRE)
What it is
Radiometrically calibrated vegetation indexing from a dedicated 5-band multispectral sensor, flown with a downwelling light sensor and a calibrated reflectance panel so results stay consistent across the mission. We produce continuous crop or canopy health models and classify the site into three management zones: low, medium, and high vigor, using NDVI and NDRE.
Who it is for
Growers, agronomists, foresters, land managers, and environmental consultants who need a measurable picture of vegetation vigor — not just a color aerial.
Thermal roof moisture surveys
What it is
Nighttime or low-sun aerial data collection with a radiometric thermal sensor, processed into a Float32 thermal orthomosaic and analyzed to help detect signs of subsurface moisture entrapment under flat roof membranes. Anomalies are mapped so repair work can be targeted rather than exploratory.
Who it is for
Facility owners, property managers, and roofing contractors inspecting commercial or industrial flat roofs who need locations and dimensions, not just a fly-over video.
Solar PV defect analysis
What it is
Aerial thermal capture of photovoltaic arrays to help identify cell- and string-level electrical resistance failures — including hot spots, bypassed diodes, and dead strings. Radiometric parameters such as emissivity and reflected apparent temperature are adjusted during processing, and defects are spatially tagged so operations and maintenance crews can go to the right panel.
Who it is for
Solar asset owners, operations and maintenance providers, and contractors responsible for array performance and repair.
Building and facility thermal envelope scans
What it is
Multi-axis vertical aerial thermal scanning of commercial facades, cold-storage facilities, and industrial infrastructure. The work is designed to help detect compromised insulation, HVAC air leakage, and thermal bridging across the structural envelope.
Who it is for
Facility owners, industrial and cold-storage operators, and building managers investigating envelope performance or planning targeted repairs.
Need more than one of these on the same site?
Mention that in your email and we will scope a single mobilization where it makes sense.