Vertical Obstruction Identification

Vertical obstructions surrounding Toronto’s Pearson Int’l Airport

VGW Geospatial has been locating, documenting, and mapping vertical obstructions for one of our many customers. Identifying vertical obstructions improves the safety of flight for our DoD and civilian aircrews as they transit numerous countries across the globe. The red dots on the above screenshot represent powerline pylons and the blue dots represent light standards either along roads or within athletic areas.  Every dot on the map represents an obstacle that is taller than 50 feet.  Most are between 50 and 100 feet, but there are occasional vertical obstructions that reach up to 1,000 feet or more.  We use a proprietary process to determine the location and height of each vertical obstruction, assuring accuracy and quality of the data we create. If these remain unidentified they create a substantial risk to our aircrews. The work we do eventually makes it into FAA and DoD flight charts to help promote safety of flight.

3-D Airfield Feature Extraction

Passenger Terminal Chennai Int’l Airport, India

VGW Geospatial is one of the few companies that can extract airfield features from stereo imagery to create 3-D airfield maps.  We use a system that includes BAE’s Socet GXP and Socet for Arc tied to ESRI’s ArcGIS Desktop 10.x software to create 3-D features.  We also use ESRI’s Data Reviewer and other tools ensure attribute data and topology are accurate. We provide deliverable products in shapefile, ESRI file geodatabase, or Google Earth (KML) formats. Shapefiles are the most common open data standard mapping deliverable, while the ESRI file geodatabase is probably the most widely used.

VGW Geospatial has been producing 3-D airfield maps for the past 4 years and has completed 58 airfields all across the globe.


VGW Geospatial provided shoreline mapping services for the Coastal Mapping Program, collecting digital shoreline data in support of NOAA’s nautical charting program. Wilson & Company managed and executed all aspects of the project including aerial photography, GPS surveying, photogrammetric mapping, feature attribution, metadata, and GIS services. Color and tide-coordinated black and white, infrared aerial photography was acquired and GPS control surveys were conducted over the project area. Photogrammetric services include performing analytical aero triangulation and extracting the shoreline at both the MHW and MLLW tidal stages. In addition to the digital shoreline files, aids to navigation and landmarks features were collected. All features were attributed to the RSD Coastal Cartographic Feature Attribution Table (CCFAT).


VGW Geospatial has provided the U.S. Army Corps of Engineers, Albuquerque District with surveying and photogrammetric services on two consecutive IDIQ contracts. Services have included photogrammetric mapping requiring acquisition of film and/or digital aerial photography, aerial triangulation, stereo mapping compilation, orthophotography, land use/land cover interpretation, creation of horizontal and vertical control networks, ground control for support of photogrammetric and LiDAR mapping, topographic mapping using total stations or GPS; detailed planimetric surveys; profile and cross section surveys, instrumentation surveys, cadastral surveys, site and utility surveys, and geographic information system (GIS) services.

Project accomplishments include:

·       Cochiti Reservoir Historical Baseline Mapping – an award winning study to determine sediment deposition and distribution trends in the reservoir and upstream in the Rio Grande

·       Comprehensive Evaluation of Project Datums Compliance Surveys – performing geodetic control and compliance surveys for 70 projects within New Mexico, Colorado, and Texas to establish a consistent basis of elevation at each USACE flood control project

·       Las Conchas Post Fire LiDAR – providing data from the canyons to produce two-foot contour equivalent digital elevation data for geometry input to USACE hydraulic model programs for geomorphic and vegetation studies

·       Holloman Airforce Base Taxiway Extension and Aircraft Parking Survey and Mapping – performing topographic  and planimetric mapping  including utility data, digital terrain models for engineering design for demolition plans, site plans, roadway plan and profiles, grading and drainage plans, and utility plans and profiles for construction