Explain the horizontal photo control method to be used. Consultant should use both ABGPS as well as the appropriate number of surveyed ground control points to meet the required accuracy specifications. Imagery Resolution: 1” = 50’ scale,4-band digital orthophotography with a 7.5 cm, (0.25 foot), pixel resolution, to include (red, green, blue, and CIR). Flight conditions: Color aerial photography shall be acquired during the leaf-free season in the spring of 2025 during the period when deciduous trees are barren. Photography will not be taken when the ground is obscured by snow, haze, fog, dust, or when cloud shadows will appear on more than five percent (5%) of the area in any one photo. The entire area of the project will be stereoscopically covered by successive and adjacent overlaps of photographs within the usable portion of the field of the lens. Aerial Triangulation: The aerial triangulation shall be sufficient to support softcopy digital photogrammetric feature accuracy requirements outlined by ASPRS Level II standards for 7.5 cm pixel size, as described in the ASPRS Positional Accuracy Standards for Digital Geospatial Data, Revision 7, Version 1, November 14, 2014. Please include a description of your AT workflow within your proposal...
