The document summarizes a mapping project completed by Continental Mapping for a wastewater treatment facility outside of Las Vegas, Nevada. Continental Mapping was engaged to complete a comprehensive mapping effort of the 140 acre, highly complex site. They acquired high accuracy aerial imagery with 0.10 foot vertical accuracy and 2.5 cm ground sample distance, and collected 3D models of buildings, tanks, and other infrastructure to develop accurate maps and models of the existing site and support proposed improvements.

1. CONTINENTAL MAPPING
Mapping from Earth, Sky and Space
www.continentalmapping.com
Madison, Wisconsin
Indianapolis, Indiana
Kansas City, Kansas
St. Louis, Missouri
Wastewater treatment facilities are extremely congested and complicated
facilities. The 140 acre plant outside of Las Vegas Nevada is perhaps one of
the most complex sites in the U.S. Infrastructure improvement planning
dictated the need for a comprehensive mapping effort. Continental Mapping
was engaged to complete this effort and proposed high accuracy aerial
mapping (0.10 foot vertical accuracy on hard surfaces) as well as 3D model-
ing of the infrastructure on the site.
Careful project planning, flight planning, and tower coordination was required
given that the project was in the McCarran Airport flight path and one runway
was down for maintenance. Quality, low altitude (2.5 cm GSD) aerial imagery
was acquired to eliminate as much building lean induced obscured area as
possible. Continental Mapping collected all of the building rooflines, bases,
stairs, interior tank walls, domed roofs, standing walls, and other features
with significant vertical displacement as wire frame 3D features in
Microstation. The ground surface was also collected to develop a tradi-
tional DTM. Post design, 3D renderings were then developed by the prime
contractor to showcase existing and proposed states.
LOCATION: Las Vegas, Nevada
YEAR COMPLETED: 2012
OBJECTIVE: Provide high accuracy imagery, mapping, and 3D delivera-
bles from low-altitude aerial photogrammetry
KEY POINTS:
• Visualization: true 3D features
• Accuracy: 0.1’ vertical & 2.5 cm GSD
• Complex: extensive infrastructure remodel
• Deliverables: orthophoto, 3D terrain surface, planimetric mapping,
3D CAD features to support modeling, and visualization
Las Vegas Public Works Photogrammetry & 3D Modeling