Drone Orthomosaic Mapping
BWM Geospatial Solutions produces high-precision orthomosaic maps for construction, engineering, agriculture, and land development projects throughout New Jersey and the surrounding region. An orthomosaic gives you a single seamless aerial image of your entire site where every pixel sits at its true map position — so you can measure directly off the image, drop it under your site plan, and see exactly what changed since last month.
What Is an Orthomosaic Map?
A standard aerial photo is not a map. Scale shifts across the frame, tall objects lean away from the center, and the lens curves lines that are straight on the ground. Measure anything off it and the number is wrong.
An orthomosaic fixes all three problems. We capture hundreds of overlapping photos of your site, then process them so that lens distortion, viewing-angle displacement, and terrain-driven lean are all mathematically removed. The corrected images merge into one continuous picture in which every pixel carries a real geographic coordinate.
The practical result: you can pull distances, calculate areas, read off coordinates, and lay the image directly over engineering drawings — with confidence that what you're measuring is what's actually on the ground.
How We Build Your Orthomosaic
- Flight planning. We set flight lines from your site boundary and required detail level, secure LAANC airspace authorization where needed, and plan ground control placement when the project calls for verified accuracy.
- Capture. Our FAA-certified pilots fly the automated mission, collecting geotagged imagery with heavy overlap between frames. RTK/PPK positioning logs precise coordinates at every shutter release.
- Processing. Imagery goes into professional photogrammetry software, which matches features between overlapping frames, solves camera positions, and builds a dense 3D reconstruction of the surface.
- Georeferencing. We tie that reconstruction to real-world coordinates using RTK/PPK positions and any surveyed control points, then reproject every source pixel onto the surface model to strip out distortion.
- Mosaicking. Corrected images merge into one seamless map. Color balancing evens out brightness and white balance across the dataset so no seam lines show.
- Quality control and delivery. We verify positional accuracy against control, check for artifacts, and deliver a georeferenced GeoTIFF with an accuracy report.
Resolution and Accuracy
Two numbers define an orthomosaic. Ground sample distance (GSD) is how much ground each pixel covers — the detail level. Positional accuracy is how closely each pixel's stated coordinates match reality.
Typical GSD ranges for different work:
- 1–2 cm per pixel — detailed construction monitoring, where individual features matter
- 2–3 cm per pixel — standard site mapping for design and documentation
- 5–10 cm per pixel — agriculture and large-area coverage
Positional accuracy depends on whether surveyed ground control is used. With control established across the site, we deliver maps accurate enough to overlay directly on engineering drawings. Without control, relative accuracy across the map holds up well while absolute positioning is looser — adequate for progress documentation and visual work.
Tell us the tolerance your project requires and we'll build the flight plan to meet it. Not every job needs ground control, and paying for it when you don't need it is waste.
What Affects Map Quality
- Flight altitude — lower flights mean smaller GSD and finer detail
- Overlap — generous overlap between frames is what makes accurate reconstruction possible
- Ground control — surveyed points across the site anchor the map to real coordinates
- Weather — overcast light is ideal; hard shadows degrade feature matching
- Sensor quality — higher-resolution cameras with mechanical shutters produce sharper source frames
- GNSS correction — RTK corrects in real time, PPK in post-processing; both reach comparable accuracy
Deliverables
GeoTIFF (.tif) — our standard delivery. Coordinate system embedded in the file, opens correctly in every major GIS and CAD platform.
KMZ / KML — Google Earth compatible, for sharing with stakeholders who don't run GIS software.
DWG / DXF — for overlaying the map on design drawings in AutoCAD.
Industries We Serve
Construction — progress tracking, earthwork verification, site plan overlays, as-built records
Engineering — existing conditions, design base mapping, drainage assessment
Agriculture — crop health analysis, drainage and irrigation planning, field mapping
Environmental — habitat mapping, wetland delineation, erosion and vegetation change monitoring
Development — feasibility studies, pre-construction records, marketing imagery
Public safety — incident documentation, pre-planning, event mapping
Orthomosaic or 3D Model?
An orthomosaic is a 2D photographic map — the right tool for visual documentation, progress tracking, and anything you'll overlay on a plan. A 3D model adds elevation and structure, letting you measure heights and volumes and view the site from any angle.
They're complementary, and one flight can produce both. See 3D mapping, or if your project involves earthwork quantities, cut & fill analysis and stockpile measurement.
What Drives Cost
Orthomosaic mapping is quoted per project. The variables that move the number:
- Site area — larger sites mean longer flights and heavier processing
- Required GSD — finer detail means lower altitude and many more images
- Ground control — surveyed points add field time but improve absolute accuracy
- Additional deliverables — terrain models, contours, and 3D products each add processing
- Frequency — recurring monitoring is priced below one-off work
Call us with your site size and what you need the map to do, and we'll give you a number.
Orthomosaic Mapping in New Jersey
BWM Geospatial Solutions provides aerial mapping throughout New Jersey and the surrounding region.