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USDA National Agricultural Statistics Service, 2023 Georgia Cropland Data Layer
STATEWIDE AGRICULTURAL ACCURACY REPORT
Crop-specific covers only *Correct Accuracy Error Kappa
------------------------- ------- -------- ------ -----
FSA Crops 400,964 78.7% 21.3% 0.730
Cover Attribute *Correct Producer's Omission User's Commission Cond'l
Type Code Pixels Accuracy Error Kappa Accuracy Error Kappa
---- ---- ------ -------- ----- ----- -------- ----- -----
Corn 1 56,425 89.9% 10.1% 0.892 86.1% 13.9% 0.852
Cotton 2 153,430 88.8% 11.2% 0.863 83.9% 16.1% 0.805
Rice 3 0 0.0% 100.0% 0.000 n/a n/a n/a
Sorghum 4 1,116 34.1% 65.9% 0.340 72.5% 27.5% 0.724
Soybeans 5 8,121 51.4% 48.6% 0.509 73.5% 26.5% 0.731
Sunflower 6 1 0.6% 99.4% 0.006 5.0% 95.0% 0.050
Peanuts 10 110,409 82.6% 17.4% 0.801 88.9% 11.1% 0.871
Tobacco 11 143 34.7% 65.3% 0.347 74.9% 25.1% 0.749
Sweet Corn 12 329 26.6% 73.4% 0.266 80.4% 19.6% 0.804
Spring Wheat 23 0 0.0% 100.0% 0.000 n/a n/a n/a
Winter Wheat 24 2,019 37.5% 62.5% 0.373 59.6% 40.4% 0.593
Dbl Crop WinWht/Soybeans 26 4,133 63.3% 36.7% 0.631 76.2% 23.8% 0.760
Rye 27 621 22.0% 78.0% 0.219 59.2% 40.8% 0.591
Oats 28 203 11.8% 88.2% 0.118 36.2% 63.8% 0.361
Millet 29 482 25.3% 74.7% 0.252 45.0% 55.0% 0.449
Alfalfa 36 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Other Hay/Non Alfalfa 37 22,192 60.5% 39.5% 0.592 68.4% 31.6% 0.672
Dry Beans 42 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Potatoes 43 0 n/a n/a n/a 0.0% 100.0% 0.000
Other Crops 44 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Sugarcane 45 46 63.9% 36.1% 0.639 93.9% 6.1% 0.939
Sweet Potatoes 46 22 26.2% 73.8% 0.262 84.6% 15.4% 0.846
Misc Vegs & Fruits 47 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Watermelons 48 4 2.1% 97.9% 0.021 20.0% 80.0% 0.200
Onions 49 2 0.7% 99.3% 0.007 11.8% 88.2% 0.117
Cucumbers 50 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Peas 53 14 7.5% 92.5% 0.075 25.9% 74.1% 0.259
Tomatoes 54 10 22.7% 77.3% 0.227 43.5% 56.5% 0.435
Herbs 57 191 34.2% 65.8% 0.342 87.6% 12.4% 0.876
Clover/Wildflowers 58 0 0.0% 100.0% 0.000 n/a n/a n/a
Sod/Grass Seed 59 2,707 76.1% 23.9% 0.760 85.7% 14.3% 0.857
Fallow/Idle Cropland 61 20 45.5% 54.5% 0.455 62.5% 37.5% 0.625
Peaches 67 263 51.5% 48.5% 0.514 63.8% 36.2% 0.638
Apples 68 3 10.3% 89.7% 0.103 42.9% 57.1% 0.429
Grapes 69 301 71.5% 28.5% 0.715 90.1% 9.9% 0.901
Christmas Trees 70 0 0.0% 100.0% 0.000 n/a n/a n/a
Other Tree Crops 71 27 19.6% 80.4% 0.196 55.1% 44.9% 0.551
Citrus 72 10 15.9% 84.1% 0.159 33.3% 66.7% 0.333
Pecans 74 32,797 85.9% 14.1% 0.854 98.5% 1.5% 0.984
Pears 77 0 0.0% 100.0% 0.000 n/a n/a n/a
Open Water 111 11,754 90.9% 9.1% 0.907 89.6% 10.4% 0.894
Developed/Open Space 121 32,583 99.6% 0.4% 0.996 85.0% 15.0% 0.845
Developed/Low Intensity 122 19,346 99.3% 0.7% 0.993 84.9% 15.1% 0.846
Developed/Med Intensity 123 8,742 99.5% 0.5% 0.995 89.0% 11.0% 0.889
Developed/High Intensity 124 3,675 99.9% 0.1% 0.999 97.4% 2.6% 0.974
Barren 131 486 34.0% 66.0% 0.339 56.1% 43.9% 0.561
Deciduous Forest 141 58,793 75.9% 24.1% 0.736 68.3% 31.7% 0.656
Evergreen Forest 142 105,384 76.9% 23.1% 0.726 67.5% 32.5% 0.623
Mixed Forest 143 13,286 32.8% 67.2% 0.308 45.7% 54.3% 0.434
Shrubland 152 8,777 35.6% 64.4% 0.344 47.4% 52.6% 0.461
Grassland/Pasture 176 30,859 65.7% 34.3% 0.638 59.2% 40.8% 0.572
Woody Wetlands 190 68,378 73.2% 26.8% 0.703 70.1% 29.9% 0.671
Herbaceous Wetlands 195 5,995 55.0% 45.0% 0.546 80.6% 19.4% 0.804
Triticale 205 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Carrots 206 0 0.0% 100.0% 0.000 n/a n/a n/a
Cantaloupes 209 30 33.7% 66.3% 0.337 96.8% 3.2% 0.968
Olives 211 4 40.0% 60.0% 0.400 44.4% 55.6% 0.444
Oranges 212 10 52.6% 47.4% 0.526 90.9% 9.1% 0.909
Broccoli 214 22 31.4% 68.6% 0.314 68.8% 31.3% 0.687
Peppers 216 1 0.8% 99.2% 0.008 14.3% 85.7% 0.143
Greens 219 2 3.4% 96.6% 0.034 10.5% 89.5% 0.105
Plums 220 1 14.3% 85.7% 0.143 100.0% 0.0% 1.000
Strawberries 221 0 0.0% 100.0% 0.000 n/a n/a n/a
Squash 222 0 0.0% 100.0% 0.000 0.0% 100.0% 0.000
Dbl Crop WinWht/Corn 225 578 42.0% 58.0% 0.419 83.4% 16.6% 0.834
Dbl Crop Oats/Corn 226 72 13.3% 86.7% 0.133 33.8% 66.2% 0.338
Dbl Crop Triticale/Corn 228 94 70.1% 29.9% 0.701 83.2% 16.8% 0.832
Pumpkins 229 0 n/a n/a n/a 0.0% 100.0% 0.000
Dbl Crop WinWht/Sorghum 236 624 44.2% 55.8% 0.441 73.8% 26.2% 0.737
Dbl Crop WinWht/Cotton 238 1,074 46.2% 53.8% 0.462 75.6% 24.4% 0.756
Dbl Crop Soybeans/Oats 240 14 5.7% 94.3% 0.057 12.4% 87.6% 0.124
Dbl Crop Corn/Soybeans 241 155 43.7% 56.3% 0.437 93.9% 6.1% 0.939
Blueberries 242 2,238 70.2% 29.8% 0.701 76.1% 23.9% 0.760
Cabbage 243 4 6.1% 93.9% 0.061 11.1% 88.9% 0.111
*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.