1. Final Review of the 2004 NAIP Digital Orthoimagery of Texas NAIP DOQ November 10, 2005 Gordon Wells and Linda Prosperie UT Center for Space Research

2. NAIP QA Assessment Procedures Phase 1. Comprehensive review of all MrSID County Mosaics Four Operators inspected: 1 geometry checkpoint per 7.5-minute quad (64 square miles) Noted all radiometric errors and cloud cover Phase 2. Selective review of quarter-quad GeoTIFFs Four Operators inspected: All geometric errors >7 m detected during Phase 1 A random selection of additional quarter-quad GeoTIFFs Noted all radiometric errors and cloud cover

3. Points QQs Percent of 17725 QQs County Mosaics 6026 5351 30.2 GeoTIFF Quarter-Quads 989 989 5.6 Total 7015 6340 35.8 NAIP QA/QC All Checkpoints

4. GeoTIFF Quarter-Quad points 989 GeoTIFF Quarter_Quads 989 NAIP QA/QC GeoTIFF Checkpoints

8. NAIP QA/QC All GeoTIFFs 3.1633 2.5384 Mean Displacement Median Displacement Mosaics 2.6423 2.4270 Mosaics + All GeoTIFFs 3.1219 2.4483 Random GeoTIFFs 2.6604 2.6653 Mean and Median Displacement

9. Mosaics 2.074 2.261 3.068 4.656 1.942 2.458 3.133 4.754Random GeoTIFFs XRMS YRMS Radial Circular RMSE Error All GeoTIFFs 2.709 3.068 4.093 6.211 Mosaics + All GeoTIFFs 2.175 2.392 3.233 4.906 NAIP QA/QC Accuracy Statistics

10. 1:4800 1” = 400’ 1:6000 1” = 500’ 1:12000 1” = 1000’ 1:2400 1” = 200’ 4.05 m 5.09 m 10.15 m 2.04 m 4.60 m 5.79 m 11.58 m 2.32 m 2.44 m 3.35 m 6.71 m 1.34 m Map Scale NMAS Circular Error NSSDA Radial Accuracy NSSDA Radial RMSE National Accuracy Standards

11. 1:4800 1” = 400’ 1:6000 1” = 500’ 1:12000 1” = 1000’ 1:2400 1” = 200’ 4.05 m 5.09 m 10.15 m 2.04 m 4.60 m 5.79 m 11.58 m 2.32 m 2.44 m 3.35 m 6.71 m 1.34 m Map Scale NMAS Circular Error NSSDA Radial Accuracy NSSDA Radial RMSE Texas NAIP 4.91 m5.62 m3.23 m Texas NAIP & Accuracy Standards

12. NAIP QA/QC Quarter-Quads with Clouds 731 or 4.12%

13. NAIP QA/QC Quarter-Quads With >10% Clouds 88 or 0.496%

14. NAIP QA/QC Quarter-Quads With Other Defects Mosaics 274 GeoTIFFs 316 Less Overlap 97 Total 483

15. NAIP QA/QC Defects other than Clouds

16. NAIP Anomaly Specular Reflection

17. NAIP Anomaly Boeing 737

18. Summary Geometric Accuracy is high. 14 of 7015 points checked (0.2%) failed. Extrapolates to <40 quarter-quads in the state. Cloud Cover is a factor. Impacts 731 quarter-quads (4.12%). By specification, causes rejection of 88 quarter quads (0.5%). Radiometric Flaws need to be addressed. Impacts 483 quarter-quads (2.72%). Severe instances would likely cause rejection of approximately 100 quarter-quads (0.6%).