Photogrammetry and GIS Base Map Development Services

The Vendor is required to provide plans to update the base map and orthophoto datasets to support the citywide geographic information system (GIS) program.
- Required deliverables:
•    Citywide aerial photography flyover
•    Ground control to support subsequent mapping products
•    3” true (no lean) 4-band 3” pixel resolution digital orthophotography
•    Creation or update of: 1”=40’ scale planimetric data set
•    Digital Elevation Model (DEM), topography, and production of a TIN
•    DTM to support orthophotography, planimetrics
•    Unified vector impervious data set
- Products from the 2018 project included:
•    New 1” = 40’ planimetric base map layers covering the City delivered in Esri File Geodatabase format
•    3” Orthophotography with a Color Infrared (CIR) band
•    Topographic mapping of 1 foot contours and spot elevations.
•    DTM to support planimetrics and topography
•    QL1 LiDAR per agency Base Specifications Version 1.2
•    LiDAR based terrain products
- Much of the utility information has been collected from other flyovers and updated by a combination of survey, GPS data collection, and in-house updates.
- The camera sensor shall be properly calibrated to ensure that data is of the highest radiometric quality and is consistent across the project area.
- The imagery shall be collected using the appropriate blue, green, red, and near infrared bands required to create natural color and color infrared data sets.
- Band to band alignment of the sensor must be of sufficient accuracy to eliminate any fringing effects in the final imagery that are related to sensor array offsets.
- The control network must be a photo identifiable solution suitable for development of all specified products (planimetric, topography, digital orthophotography) at the specified accuracies.

- Contract Period/Term: 1 year
- Questions/Inquires Deadline: February 5, 2026