Aerial Mapping Services
Rogers has performed many projects, which have included aerial mapping with topographic, hydrographic and utility surveys. These multi-task projects usually require extensive research, review of reference maps (“plan/profile” and “as built” maps when available) and extensive field investigation. For the past twenty (20) years, Rogers Surveying has partnered with Geomaps International, Inc. lead by William Crawbuck, a Certified Photogrammetrist to successfully complete the projects listed below and many more.
Recent Aerial Mapping Projects Performed for the U.S. Army Corps of Engineers
* New Jersey Meadowlands, (Bathymetry, Wetlands & Topographic Mapping)
* Old Place Creek, S.I., NY, (Bathymetry, Wetlands & Topographic Mapping)
* Woodbridge Creek, NJ, (Bathymetry, Wetlands & Topographic Mapping)
* Port Monmouth, NJ, (Flood Control, Hydrographic, Topo & Utility Mapping)
* Green Brook, NJ, (Flood Control, Topographic and Utility Mapping)
Aerial Photography & Orthophotography. Our consultant, Geomaps International, Inc. has provided Rogers timely and quality aerial photogrammetric services since 1968. Geomaps experience in aerial photogrammetric mapping ranges from flood studies to highways and entire communities. Clients include land and hydrographic surveyors, civil engineers, land planners, as well as local, state and federal agencies. The following is a list of services Geomaps has provided for Rogers All these services meet U.S. Army Corp of Engineers EM 1110-1-1000, Photogrammetric Mapping and EM 1110-1-2909, Geospatial Data Systems Requirements.
Stereo Compilation. Using state-of-the-art analytical stereo plotters interfaced to INTERGRAPH MicroStation PC workstations; digital mapping files are collected and organized during the stereo compilation process. The entire compilation environment is 100 percent digital. All Geomaps stereo operators are well trained and able to organize and edit the collected data in a manner that best fits the project. The photogrammetric production environment is designed to render the highest accuracy supporting the project schedule and budgetary guidelines. In almost all cases the Clients requirements are intentionally exceeded.
Digital Mapping & Plotting. After a project is compiled the newly collected files are transferred to the editing department. Skilled mapping editors, working on INTERGRAPH work stations, organize files into final sheets and add features such as title block, grid lines and line patterning. Data from many resources such as field surveys, field edits or underground utilities are often merged during the edit process. All digital projects are handled from start to finish on INTERGRAPH and/or AutoCAD workstations.
Cross-Sections and Profiles. Specialized photogrammetric services, such as cross-sections and profiles for state and city agencies, FEMA and the U.S. Army, Corps of Engineers have been available at Geomaps for many years. To streamline the process of collecting cross-section and profile data, Geomaps has developed software to interact with the stereo operator and the analytical plotter. This enables the company to collect single line, multiple line and curve line cross-sections or profiles with greater accuracy and efficiency. All cross-section files may be delivered in any plotted format and in a variety of digital formats including HEC-2 GR/BT and user definable ASCII. INTERGRAPH and AutoCAD are the in-house formats used to organize and store files at Geomaps but the company has extensive experience in providing data for ARC info, McDonald Douglas GDS, MOSS, HIFF and Synercom systems.
GIS Services. In a recent project, Geomaps provided Nassau County, New York with an array of mapping services including GIS mapping. Nassau County consists of a rectangular area approximately 15 miles from east to west and 20 miles north to south. Its 300 square mile area comprises one of four counties in Long Island, NY. The project consists of approximately 403,000 parcels and over 5,000 miles of street centerlines.
The aerial photography was flown at a negative scale of 1" = 800'. In total 728 stereo models were compiled at 1” =100 showing 2 foot contours. The project was delivered in Intergraph Micro Station format specifically organized for GIS. Quality control required strict topology checking for exact edge matching and for closed polygons on features that spanned multiple drawings.
Digital Orthophotos. Today digital mapping has become more than just lines and symbols. The newer GIS and CADD systems are using raster aerial images as well. To meet these demands, Geomaps provides 8, 16 and 24 bit color and black and white aerial images in any digital format or resolution. Geomaps International, Inc. will provide these files as direct scans or rectified, using a full photogrammetric orthophoto correction. All orthophoto images will be merged to form a mosaic, which can be cropped or tilted to fit any specification including Arc Info, INTERGRAPH and MapInfo.
