The Sanborn Map Company, Inc. 20230927 remote-sensing image Jefferson City, MO Missouri 911 Service Board These files contain the statewide 2023 digital Orthoimagery of Missouri. The orthorectified imagery has a pixel resolution of 15cm and was delivered in uncompressed tiled 8-bit format (4band - RGBN) GeoTIFFs, as well as compressed tiled and county-wide mosaics in MrSID format (20:1). The data was produced at the request of the Missouri 911 Service Board by The Sanborn Map Company. The data was flown between March 03 and April 14, 2023 at an altitude of 4417m (AGL) using a Leica Geosystem's ContentMapper digital frame camera system. The data projection is NAD 1983 (2011) UTM Zone 15N, meters. An orthoimage is useful as a layer of any geographic information system (GIS). It can function as a cartographic base for displaying, generating, and modifying associated digital planimetric data. Other applications include environmental impact assessments, disaster management, emergency evacuation planning, flood analysis, soil erosion assessment, facility management, ground-water and watershed analysis, right of way and road alignment, transportation network inventory and analysis, preliminary design studies, vegetation classification detection of physical features or attributes not possible at ground level, and a myriad of additional applications. 20230303 20230414 ground condition Complete Irregular -94.7053 -88.9103 39.8064 35.9447 None Orthophotography Orthoimagery 2023 Digital Imagery None Missouri Missouri 911 Service Board This data may be used by the requested party for stated purposes and should not be re-distributed. This data is meant for use by the Missouri 911 Service Board. This data cannot be used without the express, written consent of the Missouri 911 Service Board. Thomas Vought Mailing and Physical

202 Stewart Hall, Department of Geography

Columbia Missouri 65211 USA 573-882-3233 voughtth@missouri.edu County of Calaveras Microsoft Windows 10; ArcMap 10.8.1; ArcCatalog 10.8.1; Global Mapper v26; UltraMap v6.3.1; OrthoVista v14.1 Not Applicable The digital imagery is rectified to produce orthophotography at a resolution of 15cm. Once the imagery has passed quality control review, final radiometric adjustments are performed to create a uniform overall appearance. The process is overseen by a ASPRS Certified Photogrammetrist (CP). This project consists of 26,157 ortho tiles. The ortho image tiles are checked for missing pixels, gaps, overlaps and other anomalies generally associated with digital orthophoto products. Any discrepancies in the ortho tiles are resolved through the use of proprietary and industry editing tools. Once the images are copied to the deliverable media they are further checked for naming, image completeness, and ability to be loaded in ArcMap. The accuracy specification for this program is ASPRS Accuracy Standards at 1" = 200' scale with an RMSE of 2'. The project specifications require that horizontal accuracy be computed for orthoimagery files. The required accuracy meets or exceeds the ASPRS Class I Accuracy standards for15cm maps, derived according to the latest ASPRS standards. The horizontal accuracy was tested with 60 check points; all newly collected in 2023. These check points were not used in the calibration or post-processing of the imagery data. The check points were distributed throughout the project area and were surveyed using GPS techniques. The x and y positions of where the checkpoints fell on the orthoimagery were collected. These values were then compared to the surveyed control point x and y values. Accuracy has been tested to meet 0.300 meter or better RMSEx/RMSEy and 0.424 meter or better RMSEr using ASPRS Class I Accuracy Standards. NA Digital imagery was collected at a nominal GSD of 15 cm with aircraft flying at an average height of 4417m AGL. Aircraft flew with Leica Geosystem’s ContentMapper digital frame sensors with firmware 6.2.1. Each sensor collected 4 image bands Red, Green, Blue and Near-infrared in an integrated frame image with an across-track field of view 67.1 degrees. The ContentMapper spectral ranges are; Red 580-660nm, Green 480-590nm, Blue 420-510nm and Near-infrared at 720-850nm. The BSI CMOS arrays have a pixel size of 3.76 microns and deliver an integrated frame image with 40000x8200 format. The CMOS arrays have a dynamic range of 83db and the A/D converters have a resolution of 14bits. The ContentMapper is a frame-based sensor and the ground footprint of the imagery is approximately 6km wide x 1.23 km high at a nominal 15cm GSD. The maximum flightline length is limited to approximately 130km. The factory calibrations and IMU alignments for each sensor (Serial Numbers: Hx5001, Hx5005, Hx5006, Hx5007, Hx5011, Hx5015) were tested and verified by in-situ test flights before the start of the project. The Leica MissionPro Flight Planning Software is used to develop the flight acquisition plans. Flight acquisition sub blocks are designed first to define the GNSS base station logistics, and to break the project up into manageable acquisition units. The flight acquisition sub blocks were designed based on the native UTM zone of the deliverable mapsheets provided by Sanborn, flight line length limitations (to ensure sufficient performance of the IMU solution), as well as air traffic restrictions in the area. Once the sub blocks have been delineated, they are brought into MissionPro for flight line design. The design parameters used in MissionPro will be 20% lateral overlap and 15cm resolution. The flight lines have been designed with a north/south orientation or east/west where required for efficiency. The design considers the latitude of the state, which affects line spacing due to convergence as well as the terrain. SRTM elevation data is used in the MissionPro design to ensure the minimum 15cm GSD is achieved over all types of terrain. The raw data was downloaded from the sensors after each flight using Leica HxMap software. The imagery was then georeferenced using the 500Hz GPS/INS data creating an exterior orientation for each frame image (x/y/z/o/p/k). Leica HxMap APM software was used to automatically generate tiepoint measurements between the frame images for each line and to tie all flight lines together. The resulting point data and exterior orientation data were used to perform a full bundle adjustment using HxMap Triangulation software. Blunders were removed, and additional tie points measured in weak areas to ensure a robust solution. Once the point data was clean and point coverage was acceptable, photo-identifiable GPS-surveyed ground control points were introduced into the block adjustment. The bundle adjustment process produces revised exterior orientation data for the sensor with GPS/INS, datum, and sensor calibration errors modeled and removed. Using the revised exterior orientation from the bundle adjustment, orthorectified image frames were created with HxMap software and the 2022 or newer HxIP DEM. The HxMap orthorectification software applies an atmospheric-BRDF radiometric correction to the imagery. This correction compensates for atmospheric absorption, solar illumination angle and bi-directional reflectance. The orthorectified frames were then overlaid with each other and the ground control to check accuracy. Once the accuracy of the orthorectified image strips were validated the strips were then imported into the HxMap Mosaic software which was used for the final radiometric balance, mosaic, and tile creation. 20230927 Shawn Benham The Sanborn Map Company, Inc. Vice President of Programs Mailing

305 S Rockrimmon Blvd, Suite 200

Colorado Springs Colorado 80919 USA 719-502-1296 sbenham@sanborn.com Vector G-polygon 56768 Universal Transverse Mercator 15 0.9996 -93.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 survey feet NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_2011 GRS_1980 6378137.0 298.257222101 Shawn Benham The Sanborn Map Company, Inc. Vice President of Programs Mailing

305 S Rockrimmon Blvd, Suite 200

Colorado Springs Colorado 80919 USA 719-502-1296 sbenham@sanborn.com Downloadable Data None 20230927 Thomas Vought mailing and physical address

202 Stewart Hall, Department of Geography

Columbia Missouri 65211 USA 573-882-3233 voughtth@missouri.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile