March 17, 2016
REQUEST FOR PROPOSAL
RITCHIE COUNTY COMMISSION
RITCHIE COUNTY ASSESSOR
The County of Ritchie solicits firms to submit proposals for âCountywide Orthophoto Project.ã The original and three (3) submittals (FOR A TOTAL OF FOUR (4) PROPOSALS), marked âCountywide Orthophoto Projectã will be received in a sealed envelope not later than [3:00] p.m., Local Prevailing Time, April 8, 2016 to the:
Ritchie County Commission
115 E. Main Street Room 201
Harrisville, WV 26362
Facsimile and/or electronic proposals will not be accepted. Proposals received after the announced time and date of receipt, by mail or otherwise will be returned unopened. Nothing herein is intended to exclude any responsible firm or in any way restrain or restrict competition.
On the contrary, all responsible firms, local, faith-based, minority-owned and female-owned are encouraged to submit a proposal.
The County reserves the right to reject any or all of the proposals, to waive informalities and to award in part or in whole any or all proposals. Any proposal submitted MUST be signed by an individual authorized to bind the offeror.
- Illegal Aliens and Out of Country Subcontractors
Use of individuals not permitted to work in the United States will not be allowed. Subcontracting any portion of this project to any subcontractors outside of the United States is also forbidden. By signing this proposal document the vendor acknowledges these requirements.
- Contact for this RFP
Proposing firms (herein âContractorã) may submit questions to the County concerning this Request for Proposal (RFP). Questions may be submitted via email to [email protected]. All questions from Contractors and responses by the County will be available upon request until the RFP submittal deadline. Questions and responses will not be publicly posted.
III. Project specifications
The purpose of this countywide orthophoto project is to acquire current color digital orthophotography for the County.
All work will be performed in reference to North American Datum 1983, West Virginia State Plane Coordinate System and North American Vertical Datum 1988 in United States Survey feet.
Project Area
Digital orthophotos will include, at a minimum, 500 feet past the County boundary.
Airborne Global Positioning System and Ground Control
The use of Airborne Global Positioning System (ABGPS) control technology is required for this project. All submissions should include a flight plan indicating the planned flight lines and photo centers. To support the GPS ground control, during the aerial imagery mission, GNSS-IMU data shall be acquired by the Contractor, providing highly accurate exposure station coordinates and sensor rotation angles for the purpose of digital aero-triangulation. Every effort shall be made to utilize ground control points that are within public properties, (i.e., within road right-of-ways), however, prior to placing ground control targets on private property, the Contractor shall obtain permission of the property owner or proper agency. Ground control should be designed to support ASPRS Class II 1ã=100’ planimetric mapping.
Digital Aerial Imagery
4-Band, 8-bit, color digital aerial imagery shall be acquired. The flight plan will be planned to average thirty percent side overlap between flight lines and sixty percent forward overlap between photos. Digital aerial imagery shall be acquired during the period when deciduous trees are barren and when the sun angle or elevation is not less than thirty degrees above the horizon. The ground must have less than three percent snow cover and vegetation must have less than five percent leaf cover. Digital aerial imagery will not be acquired when the ground is obscured by snow, haze, fog, or dust; or when the clouds or cloud shadows will appear in any one photograph. Photography shall be acquired only when well-defined images can be obtained. The digital aerial imagery will be acquired by using a modern, large format, frame format digital airborne sensor. The Contractor must provide a copy of the current manufacturer’s sensor calibration report. Natural color, 3-Band imagery will be the required deliverable. The Contractor will be responsible for storage of the raw and post processed digital airborne imagery, other relative project data and interim or final products under proper conditions at no cost to the County, for a period of time not to exceed five years from the completion of the project.
Digital aero-triangulation
Digital aero-triangulation of the exploitation imagery will be conducted by the Contractor. Aero-triangulation shall be accomplished by softcopy procedures that involve softcopy workstations, fully analytical aero-triangulation software, and high-resolution digital imagery. The Contractor must follow accepted softcopy aero- triangulation procedures and utilize equipment that will achieve the aero-triangulation accuracy required to meet or exceed the required RMS accuracy.
Orthophotos
Color digital orthophotography shall be produced as orthogonally rectified images from the original perspective aerial photography images. The process requires the unrectified raster imagery and a digital elevation model (DEM) with the same area of coverage as the digital orthophoto. These inputs will be used collectively to register the raw image file mathematically to determine the location of the camera position and orientation with respect to the ground and to remove the relief displacement from the image file. The output pixel resolution for the final digital ortho-mosiac will be 4 inches (0.33’). The County will specify the deliverable format of the imagery at a time deemed appropriate by the County. The Contractor must be able to produce TIFF, JPEG, and MrSID format files. The Contractor will take necessary steps and procedures to ensure consistent color, tone and contrast across the entire digital orthoimagery coverage without causing image data loss or degradation of image quality and clarity. Mosaic seam lines shall not cross through buildings, bridges, or other man-made structures and shall try to follow features or any other obvious logical path that will help hide seam lines and allow for a seamless mosaic result. Acceptable mosaic techniques must produce quality orthoimagery of consistent tone and contrast and must do so without obvious seam lines, within reasonable expectations.
Optional LiDAR bare-earth two foot contours
The Contractor will supply an optional cost to provide National Enhanced Elevation Assessment (NEEA) Quality Level 3 LiDAR derived two (2) foot contours for the purpose of compiling a general representation of the County surface. Supplemental break lines and updating of âactiveã areas is not required. Contour lines shall be shown as solid lines at a vertical interval of two (2) feet on 1ã=100’ scale topographic maps. Every fifth contour line (every 10 feet) shall be an index contour indicated by a line heavier than that used for the intermediate contours. In those areas where vegetation prohibits accurate plotting of contour elevations, the contour line elevations shall be interpolated as accurately as possible.
Optional building footprints
The Contractor will supply an optional cost to provide 1ã=100’ ASPRS Class II building footprints within the County limits. The county understands that the term âfootprintã does actually refer to the outline of the roof of each structure.
- Submission
Each proposal addressing the scope of work shall be presented in a full, written report, which shall include, but not necessarily limited, to the following:
- A statement of understanding of the work to be done and a description of the approach and procedures which will be employed in completing the project.
- A general implementation schedule giving length of time required to complete the project.
- Brief outline of the firmás qualifications.
- At least two project references with names and contact information of persons knowledgeable about quality of work on similar projects and who may be contacted for reference.
A selection committee will review all responses. Formal or informal discussions may take place with firms that the committee selects as the most qualified. Sample products may also be requested by The County. Proposals will be evaluated based on the experience of the Contractor, the capability of the Contractor, the cost of the project, and other factors deemed by the County to be in the best interest of the County. The County reserves the right to final selection of consultant, waive informalities and/or irregularities, accept or reject any or all proposals for services and award the contract as deemed to be in the best interest of the County.
It is the responsibility of the prospective consultant to inquire about and to clarify any requirements of the Request for Proposal which are not understood.
All work performed by the Contractor shall be in strict conformance with the specifications stated herein or referenced by this RFP (ASPRS Class II) as well as those stated in the final contract, unless noted otherwise in this RFP or final contract. Any modifications to said Specifications or other terms of this Agreement shall be permitted only upon written request by the Contractor, stating justification thereof, and written approval by the County.
Mar 23, 30