Avioimage Mapping Services, Inc.

Project Planning, Control & Image Acquisition

Consulting, Consider Data Sources

The first step: creating preliminary project boundary based on client's needs. We'll investigate all possible data sources
(from public to our internal collection of imagery), determining what data needs to be acquired.

Build Photo Layout & Flight Plan

Flight plans are created to cover the project area and estimates given. A lot of variation is involved to produce the intended results.

PID Points

If photos are preexisting, PID (photo ID points) must be picked - which can be both seen from the photos... and measured accurately on the ground.

Set Panels

If no imagery yet exists, the option to lay ground panels is available (typically needed in more undeveloped areas).

GPS Control

PIDs and/or panels are visited with high accuracy (mapping grade) GPS equipment, where coordinates are recorded.

Authorize Flight

Aerial photography is now ordered to our exact specifications and inspected.

Photogrammetry & CAD

Analytical Triangulation (AT)

Specialized technicians known as Photogrammetrists "bridge", or connect the photos together, via picking and measuring common points.

Pass & Tie Points

Pass points link images within the same flight line together, whereas tie points join different flight lines (if multiple lines were needed).

Incorporating Control

Control data acquired with GPS is added to the "solution", effectively pinning down the imagery to known ground points. The result: a geographically aware mesh of overlapping imagery, the main ingredient for the next step.

Data Compilation - Planimetrics

Using highly specialized workstations, vector data (points, lines & polygons) are drawn on top of imagery in 3D which represent ground features (buildings, roads, utilities, vegetation, etc.). This data is referred to as planimetrics.

Data Compilation - DTM

To create an elevation file, more 3D data (mass points & breaklines) are drawn, which represent detailed ground characteristics (ridges, ditches, mounds, pits, etc.).


Data from the stereo-models are combined, revisions made, and final planimetric and/or topographic product produced.
(This is where quality control and format conversions take place).

Orthomosaic Production

Assembling Data Needed

Project boundary, images and elevation files (breaklines, mass points, LiDAR, gridded DTM, etc.) are gathered.

Converting Elevation Files

Elevation files are adjusted as needed, specifically for purpose of producing an accurate ortho.

Lighting Adjustments

Previously triangulated and controlled imagery is dodged and color balanced if needed.


Images are warped with the elevation data, effectively draping the image over the 3D digital model.


Stiching the clipped images together and the final product to the project boundary. Graphics editing is final step.

Final Mosaic

The final product is commonly a georeferenced raster file, or a large-scale plot.

Data Conversions & Digital Maps

Elevation File Types

LiDAR point clouds, TINs (Triangulated Irregular Network), breaklines, topo/relief maps, contours, DEM and DTM grids

Vector Formats

DGN, DXF, DWG, Shapefile, Geodatabase, Excel spreadsheet, etc.

Raster Formats


Utility Maps

Water, Storm Water, Sewer, Electric, Gas, Cable, Fiber Optic, etc.

Proximity Maps

High quality maps of any subject/zoom level

Residential Lot Mapping

Residential land development maps track progress in any chosen metric