Surdex provides our clients with digital maps that are often used in Geographic Information Systems (GIS) that enable their staff to work quicker, more efficiently and with a high level of accuracy. Digital mapping enables civil engineers and city planners to accurately see the terrain and contours of an area, with topographic mapping, and natural and man-made features with planimetric mapping. Data can be embedded into the map, transforming them into “intelligent maps.” Geospatial data is acquired either through remote sensing methods such as aerial photography with film cameras or digital cameras, or a LiDAR scanning and ranging laser system. Imagery is processed into highly accurate digital orthoimagery that is geometrically-corrected images of the earth’s surface, and the data is often incorporated into a map to produce accurate elevations and contours. Our extensive experience enables us to develop time-saving automated processes that increase efficiency, without compromising quality. We can therefore design and build products that meet specifications and accuracy requirements in the most economical, timely manner. For over 60 years, our goal has been to serve our clients – with quality, accuracy and precision.
Surdex provide custom digital maps to help our clients meet their Geographic Information Systems (GIS) needs. A GIS is used to view, manage and analyze geospatial data. The key to a successful GIS is functionality – this functionality comes from quality base maps in the GIS. For instance, the better the resolution, the more ground feature detail is visible on the imagery.
LiDAR (acronym for “Light Detection And Ranging”) is a scanning and ranging laser system that is used to produce accurate Digital Terrain Models that can be used for contour modeling. LiDAR sensors emit pulses of light and measures the time it takes for the signal to return. LiDAR has the capability to provide accurate surface modeling quickly and efficiently, in places previously not possible.
Surdex owns a fleet of nine specialized aircraft equipped with all the equipment necessary to acquire and process remotely sensed geospatial data. This equipment includes digital imaging sensors, LiDAR sensors, Airborne GPS / IMU equipment, and control survey equipment. The cornerstone of our acquisition is the combination of our four Leica ADS100 Aerial Digital Sensors with our four Cessna 441 Conquest twin-engine turboprop aircraft.
Surdex owns an Altavian Nova Unmanned Aerial System, a portable acquisition platform and system that is ideal for acquisition of smaller, immediate need digital orthoimagery. Programmed at the site, the craft can be deployed quickly and can collect data at low altitudes, even with high altitude cloud cover that may inhibit traditional aerial acquisition.
Topographic maps depict the three-dimensional shape of the earth’s surface with contour lines at specific intervals to depict the shape and elevation (or relief) of terrain. Topographic maps often portray both natural and man-made features. A planimetric map consists of both man-made and natural features. These features are represented three-dimensionally as lines, polygons and points.
Surdex can produce various scales of color (3-band, RGB) and color infrared (4-band, RGBN) digital orthophotography from aerial imagery. These photo-quality digital images of surface features in their geometrically-corrected, true-map positions for the basemaps for Geographic Information Systems.