Specifications include, but are not limited to: The Consultant shall deliver images that have been re-sampled to the desired resolution a.k.a. Ground Sample Distance (GSD) of 0.5 feet. The original raw imagery must have a GSD less than or equal to the desired final resolution of the orthoimagery. Orthoimagery that has been resampled to a higher resolution than the original raw imagery GSD will NOT be accepted. The allowable RMSEx and RMSEy shall be less than or equal to 1.0 feet (2 pixels) per FDOT Survey Handbook (OCTOBER 10, 2016), Section 25. 4.3 Horizontal and Vertical Datum Unless otherwise requested the Orthophotography and other topographic products shall be referenced to the North American Datum of 1983 2011. The map projection referenced shall be to the appropriate Florida State Plane Coordinate System in units of U.S. Survey Feet. Orthophotography and other topographic products shall be referenced to the North American Vertical Datum of 1988 (NAVD 88), in units of U.S. Survey Feet. 4.4 Horizontal Map Accuracy The final horizontal map accuracy of Orthophotography products shall be determined using well defined photo identifiable check points. Computed local horizontal accuracy shall meet or exceed 2.5 feet at the 95% confidence interval as specified in the FGDC “Geospatial Positioning Accuracy Standards, Part 3: National Standard for Spatial Data Accuracy”. A minimum of twentyfive (25) independent checkpoints within the project area will be used for verification. Check points will be distributed throughout the dataset. 4.5 Digital Elevation Model A Digital Elevation Model adequate to support accuracy specifications identified for this project must be created to accurately orthorectify photographic imagery. The Consultant is responsible for evaluating the accuracy of the DEMs, and when necessary shall collect additional surface information to accurately orthorectify photographic imagery. The Consultant will submit information in the final survey report and metadata which documents the source, enhancements made, and density of the DEMs utilized for the Orthophoto mapping project.