NYS Office of Information Technology Services, GIS Program Office 20201019 raster digital data NYS Digital Orthoimagery Program (NYSDOP) 2020 imagery in New York County, NY Albany, New York NYS ITS GIS Program Office These files contain 2020 digital True Ortho-imagery of New York County, New York. Image pixel size is 0.5' GSD. Image type is 4-band, RGBI. Image horizontal accuracy is within 2' at the 95% confidence level (NSSDA). Each file contains an image covering 2500 ft. by 2500 ft. on the ground. This digital True Ortho-imagery can serve a variety of purposes, from general planning to field reference for spatial analysis to a tool for revision of vector maps. It can also serve as a reference layer for GIS. 20200321 20200406 ground condition Complete Irregular -74.0877 -73.9069 40.8872 40.6950 None Digital True Orthoimagery None New York County New York None None Tim Ruhren Office of Information Technology Services mailing and physical

W. Averell Harriman State Office Campus Bld 5 - Floor 1

1220 Washington Avenue

Albany New York 12226 USA 518-242-5029 NYSGIS@its.ny.gov NYS Office of Information Technology Services - GIS Program Office Microsoft Windows 10 Service Pack 1; ESRI ArcCatalog 10.6.1 Not Applicable The New York State Office of Information Technology Services makes no claims to the accuracy of the information in this file. THE GIS DATA IS PROVIDED AS IS AND WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED, AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. NYS ITS does not represent or warrant that the GIS data is error-free, complete, current, or accurate.The dataset contains raster images or digital ortho images so the logical consistency report is not applicable. The file naming convention was supplied by New York State. When the ortho tiles were created the file names were restricted to a numeric value representing the lower left corner of the ortho tile. The project consisted of 246 final tiles. +/-2 ft. at the 95% confidence level (NSSDA) for 6 inch resolution. NA This dataset contains true orthoimagery of New York County, New York as part of the contract to provide new natural color digital aerial imagery with GNSS/IMU control and ground surveyed control to develop and support 4 band (RGBI) 8 bit 0.5' pixel resolution for New York County within the New York City's five boroughs. Imagery acquisition and flight lines were planned and acquired for the NYC area based upon the project specifications of selective true orthos using a diagonal orientation with a forward overlap of 80 percent and a flight line sidelap of 60 percent. The area was planned and flown with Vexcel Ultracam Eagle 80mm focal length digital mapping camera equipped with flight navigation systems and airborne GPS and inertial measurement units flown at an approximate altitude of 7000' above mean ground elevation. For the Aerial Triangulation (AT), Automatic Point Measurement (APM) was run on the images to measure terrain points to tie the image together. The imagery was then used in the AT process in UltraMap where ground control points and airborne GPS were introduced to further refine the data. Final EO data was derived using the UltraMap mapping platform. The UltraMap Ortho module produced a Digital Surface Model (DSM) at a 0.5' resolution of the entire NYC area. The DSM data was then applied in the orthorectification process to produce 4-band RGB-IR digital orthoimages free of distortion and lean. All orthorectified images were reviewed for consistency with project requirements before the mosaicking and tiling process. Bridge distortions and other errors were corrected at this stage. As part of the mosaicking and tiling process in UltraMap, all images were adjusted for color and radiometric differences for the entire image dataset. The individual tiles produced were then inspected in a final QA/QC process for overall image quality with all undesirable artifacts and errors corrected before delivery. The end product for New York City was seamless 8-bit 4-band RGBI image tiles, 2500 by 2500 feet wide in GeoTIFF/TFW format. Imagery was also delivered in JP2/J2W format at a 10:1 compression ratio with ESRI AUX and MapInfo TAB files. 20201019 Aerial Imagery The Sanborn Map Company, Inc. Shawn Benham Vice President of Programs mailing

Suite 100

Colorado Springs Colorado 80920 USA 719-502-1296 sbenham@sanborn.com Vector G-polygon 246 Lambert Conformal Conic 40.66666666666666 41.03333333333333 -74.0 0.0 984250.0 0.0 coordinate pair 0.6096 0.6096 survey feet NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_2011 GRS_1980 6378137.0 298.257222101 The Sanborn Map Company, Inc. Shawn Benham Vice President of Programs mailing

Suite 100

Colorado Springs Colorado 80920 USA 719-502-1296 sbenham@sanborn.com Data available upon request None 20201019 Tim Ruhren Office of Information Technology Services mailing and physical

W. Averell Harriman State Office Campus Bld 5 - Floor 1

1220 Washington Avenue

Albany New York 12226 USA 518-242-5029 NYSGIS@its.ny.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile