In May 2012, G&AI acquired Williams-Stackhouse, Inc., a San Antonio firm that has provided aerial mapping and related services for more than half a century (since 1960). Our full-service photogrammetric production facility is housed in a 9,000 square foot structure that also contains a Department of Defense approved vault for storing classified materials.
G&AI provides a wide variety of aerial mapping and related services. This requires acquisition of precision aerial photography and light detection and ranging (LiDAR) data for collecting both map data and imagery used for engineering-design and infrastructure-related applications. G&AI develops highly accurate design-grade map data for high-resolution color imagery. This includes corridor projects, such as highways, railways, transmission lines, pipelines, etc.
- Digital/Film Aerial Photography with Airborne GPS
- Image Scanning
- Aerial LiDAR (rotary/fixed wing)
- Photogrammetric Control Surveys
- Digital Planimetric/Topographic Mapping
- Cross Sections/Volumetric Calculations
- Digital Terrain Models (DTM)
- Digital Orthoimagery
- Geographic Information Systems (GIS)
- Aerial Video
- Digital Obliques
- Three Certified Photogrammetrist
- Licensed Surveyor/Photogrammetrist
- Trained photogrammetric and GIS technicians with experience in every phase of the aerial mapping profession
- 12 digital mapping work stations with the capability of delivering data in most commonly used CAD/GIS software formats (AutoCAD, MicroStation, ArcView, ArcGIS, etc.)
- Strategically located flight resources for rapid mobilization to projects anywhere in the United States
Digital Cameras/Flight Management Systems
- 3 Z/I Imaging DMCII 140 Digital Mapping Cameras
- 3 Z/I Imaging Gyro-Stabilized Camera Mounts
- 3 Z/I Imaging In-Flight Computers with Flight Management Systems
- 3 Z/I Imaging PPC CC Software Licenses for Raw Image Data Post Processing of Direct Digital Camera Files
- 2 Trimble 4000SSE Dual-Frequency GPS Receivers
- 1 Navcom Technologies SF-2050M Starfire GPS Receiver
- 3 Novatel SPAN-SE Dual-Frequency, Survey Grade Geodetic GPS/IMU Receivers
- 1 Novatel SPAN-SE Dual-Frequency, Survey Grade Geodetic GPS Receiver
- 5 Thales Z-Max Dual-Frequency, Survey Grade Geodetic GPS Receivers
- 3 Novatel-Imar F-SAS IMUs
- Trimble Compact L1/L2 Antenna with Ground Plane
- Sensor Systems S67-1575-86 L1/L2 Aircraft Antenna
- Navcom Technologies GNSS Airborne Antenna
- 5 Base Station Set-ups for Static Dual-Frequency GPS Data Collection
- Waypoint GrafNav/GrafNet/Inertial Explorer Static GPS and Kinematic ABGPS/IMU Post Processing Software
- StarPac Aerial Survey Application Software
Mobile LiDAR
- StreetMapper360 Terrestrial Mobile Laser Scanner (TMLS)
- Riegl VQ250 Scanner (300kHz pulse rate), IGI IMU-iid inertial measurement unit, NovAtel L1/L2 GPS Antenna, and internal 12-channel L1/L2 dual frequency GPS receiver
- StreetMapper360 Terrestrial Mobile Laser Scanner (TMLS)
- Riegl VQ250 Scanner (300kHz pulse rate), IGI IMU-iid inertial measurement unit, NovAtel L1/L2 GPS Antenna, and internal 12-channel L1/L2 dual frequency GPS receiver