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USDA National Agricultural Statistics Service, 2023 Arizona Cropland Data Layer
STATEWIDE AGRICULTURAL ACCURACY REPORT
Crop-specific covers only *Correct Accuracy Error Kappa
------------------------- ------- -------- ------ -----
FSA Crops 264,949 81.0% 19.0% 0.767
Cover Attribute *Correct Producer's Omission User's Commission Cond'l
Type Code Pixels Accuracy Error Kappa Accuracy Error Kappa
---- ---- ------ -------- ----- ----- -------- ----- -----
Corn 1 16,408 82.0% 18.0% 0.817 87.6% 12.4% 0.873
Cotton 2 30,082 92.8% 7.2% 0.926 90.0% 10.0% 0.896
Sorghum 4 1,823 83.4% 16.6% 0.834 61.7% 38.3% 0.616
Sunflower 6 22 8.4% 91.6% 0.084 52.4% 47.6% 0.524
Barley 21 1,985 58.5% 41.5% 0.584 74.4% 25.6% 0.743
Durum Wheat 22 4,710 77.3% 22.7% 0.772 72.3% 27.7% 0.721
Spring Wheat 23 20 8.9% 91.1% 0.089 90.9% 9.1% 0.909
Winter Wheat 24 912 55.0% 45.0% 0.549 68.5% 31.5% 0.684
Rye 27 68 77.3% 22.7% 0.773 78.2% 21.8% 0.782
Oats 28 1,675 53.8% 46.2% 0.537 67.2% 32.8% 0.671
Millet 29 0 n/a n/a n/a 0.0% 100.0% 0.000
Mustard 35 0 n/a n/a n/a 0.0% 100.0% 0.000
Alfalfa 36 94,249 94.6% 5.4% 0.939 89.4% 10.6% 0.883
Other Hay/Non Alfalfa 37 6,931 73.5% 26.5% 0.732 61.8% 38.2% 0.615
Sugarbeets 41 28 60.9% 39.1% 0.609 56.0% 44.0% 0.560
Dry Beans 42 360 48.5% 51.5% 0.484 50.8% 49.2% 0.508
Potatoes 43 1,007 52.4% 47.6% 0.523 84.1% 15.9% 0.840
Other Crops 44 366 31.5% 68.5% 0.314 71.2% 28.8% 0.712
Misc Vegs & Fruits 47 0 n/a n/a n/a 0.0% 100.0% 0.000
Watermelons 48 23 16.4% 83.6% 0.164 40.4% 59.6% 0.403
Onions 49 639 51.7% 48.3% 0.516 66.6% 33.4% 0.665
Chick Peas 51 228 88.4% 11.6% 0.884 89.4% 10.6% 0.894
Herbs 57 49 15.6% 84.4% 0.156 70.0% 30.0% 0.700
Sod/Grass Seed 59 1,020 82.3% 17.7% 0.822 80.8% 19.2% 0.807
Fallow/Idle Cropland 61 72,267 74.1% 25.9% 0.719 91.2% 8.8% 0.903
Grapes 69 14 56.0% 44.0% 0.560 87.5% 12.5% 0.875
Other Tree Crops 71 1,572 92.0% 8.0% 0.920 90.2% 9.8% 0.902
Citrus 72 878 85.2% 14.8% 0.852 52.6% 47.4% 0.526
Pecans 74 4,797 92.7% 7.3% 0.926 91.6% 8.4% 0.916
Open Water 111 1,825 91.3% 8.8% 0.912 95.1% 4.9% 0.950
Developed/Open Space 121 5,781 80.8% 19.2% 0.806 65.4% 34.6% 0.652
Developed/Low Intensity 122 4,784 96.1% 3.9% 0.961 86.7% 13.3% 0.866
Developed/Med Intensity 123 4,507 99.4% 0.6% 0.994 96.2% 3.8% 0.962
Developed/High Intensity 124 1,385 99.8% 0.2% 0.998 97.4% 2.6% 0.974
Barren 131 16,251 86.3% 13.7% 0.860 85.6% 14.4% 0.853
Deciduous Forest 141 72 30.0% 70.0% 0.300 55.8% 44.2% 0.558
Evergreen Forest 142 85,363 90.7% 9.3% 0.897 89.2% 10.8% 0.881
Mixed Forest 143 32 15.2% 84.8% 0.152 37.2% 62.8% 0.372
Shrubland 152 496,972 96.9% 3.1% 0.935 94.8% 5.2% 0.893
Grassland/Pasture 176 19,554 73.5% 26.5% 0.729 85.8% 14.2% 0.854
Woody Wetlands 190 1,630 59.9% 40.1% 0.599 71.9% 28.1% 0.719
Herbaceous Wetlands 195 244 25.1% 74.9% 0.250 44.2% 55.8% 0.441
Pistachios 204 213 64.7% 35.3% 0.647 99.5% 0.5% 0.995
Triticale 205 1,864 60.3% 39.7% 0.602 66.2% 33.8% 0.661
Carrots 206 161 79.3% 20.7% 0.793 55.7% 44.3% 0.557
Cantaloupes 209 111 82.2% 17.8% 0.822 42.5% 57.5% 0.425
Olives 211 195 88.6% 11.4% 0.886 79.9% 20.1% 0.799
Oranges 212 0 n/a n/a n/a 0.0% 100.0% 0.000
Broccoli 214 583 50.6% 49.4% 0.505 34.8% 65.2% 0.347
Peppers 216 0 n/a n/a n/a 0.0% 100.0% 0.000
Greens 219 599 48.3% 51.7% 0.482 28.6% 71.4% 0.285
Dbl Crop WinWht/Corn 225 2,233 77.5% 22.5% 0.774 68.7% 31.3% 0.686
Dbl Crop Oats/Corn 226 4,257 75.6% 24.4% 0.755 73.9% 26.1% 0.738
Lettuce 227 1,847 48.3% 51.7% 0.481 43.7% 56.3% 0.435
Dbl Crop Triticale/Corn 228 6,016 80.9% 19.1% 0.807 74.2% 25.8% 0.740
Dbl Crop Lettuce/Cantaloupe 231 954 73.7% 26.3% 0.736 62.6% 37.4% 0.626
Dbl Crop Lettuce/Cotton 232 1,634 65.0% 35.0% 0.650 73.8% 26.2% 0.737
Dbl Crop Lettuce/Barley 233 224 68.5% 31.5% 0.685 28.3% 71.7% 0.283
Dbl Crop WinWht/Sorghum 236 737 69.2% 30.8% 0.692 80.2% 19.8% 0.802
Dbl Crop Barley/Corn 237 207 51.8% 48.3% 0.517 52.3% 47.7% 0.523
Dbl Crop WinWht/Cotton 238 578 83.4% 16.6% 0.834 91.6% 8.4% 0.916
Cabbage 243 241 38.0% 62.0% 0.379 41.0% 59.0% 0.409
Cauliflower 244 69 12.7% 87.3% 0.127 27.5% 72.5% 0.275
Celery 245 89 26.6% 73.4% 0.265 33.0% 67.0% 0.329
Gourds 249 4 12.1% 87.9% 0.121 80.0% 20.0% 0.800
*Correct Pixels represents the total number of independent validation pixels correctly identified in the error matrix.
**The Overall Accuracy represents only the FSA row crops and annual fruit and vegetables (codes 1-61, 66-80, 92 and 200-255).
FSA-sampled grass and pasture. Non-agricultural and NLCD-sampled categories (codes 62-65, 81-91 and 93-199) are not included in the Overall Accuracy.
The accuracy of the non-agricultural land cover classes within the Cropland Data Layer is entirely dependent upon the USGS, National Land Cover Database. Thus, the USDA NASS recommends that users consider the NLCD for studies involving non-agricultural land cover. For more information on the accuracy of the NLCD please reference <https://www.mrlc.gov/>.
Attribute_Accuracy_Value:
Classification accuracy is generally 85% to 95% correct for the major crop-specific land cover categories. See the 'Attribute Accuracy Report' section of this metadata file for the detailed accuracy report.
Attribute_Accuracy_Explanation:
The strength and emphasis of the CDL is crop-specific land cover categories. The accuracy of the CDL non-agricultural land cover classes is entirely dependent upon the USGS, National Land Cover Database. Thus, the USDA NASS recommends that users consider the NLCD for studies involving non-agricultural land cover.
These definitions of accuracy statistics were derived from the following book: Congalton, Russell G. and Kass Green. Assessing the Accuracy of Remotely Sensed Data: Principles and Practices. Boca Raton, Florida: CRC Press, Inc. 1999. The 'Producer's Accuracy' is calculated for each cover type in the ground truth and indicates the probability that a ground truth pixel will be correctly mapped (across all cover types) and measures 'errors of omission'. An 'Omission Error' occurs when a pixel is excluded from the category to which it belongs in the validation dataset. The 'User's Accuracy' indicates the probability that a pixel from the CDL classification actually matches the ground truth data and measures 'errors of commission'. The 'Commission Error' represent when a pixel is included in an incorrect category according to the validation data. It is important to take into consideration errors of omission and commission. For example, if you classify every pixel in a scene to 'wheat', then you have 100% Producer's Accuracy for the wheat category and 0% Omission Error. However, you would also have a very high error of commission as all other crop types would be included in the incorrect category. The 'Kappa' is a measure of agreement based on the difference between the actual agreement in the error matrix (i.e., the agreement between the remotely sensed classification and the reference data as indicated by the major diagonal) and the chance agreement which is indicated by the row and column totals. The 'Conditional Kappa Coefficient' is the agreement for an individual category within the entire error matrix.