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North American Croplands: Updates Richard Massey; Teki Sankey.

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Presentation on theme: "North American Croplands: Updates Richard Massey; Teki Sankey."— Presentation transcript:

1 North American Croplands: Updates Richard Massey; Teki Sankey

2 Progress in PhD SemesterYearSessionJob DescriptionStatus 12013FallEnroll in Phd Program Course work Completed 22014SpringPhd Committee Program of study Course work Completed 2’2014SummerProfessional ExperienceCompleted 32014FallCourse WorkCompleted 42015SpringPhd Prospectus Written Comprehensive exams Course work Oral Comprehensive exams Completed Ongoing Pending 52015FallChapter 1Pending 62016SpringChapter 2Pending 72016FallChapter 3Pending 82017SpringDefensePending

3 Comprehensive exam: Written Paper: Knowledge based cropland classification using MODIS data at 250 m by iterative decision tree algorithms Proposal: Fast and efficient processing of high dimensional datasets using cluster based High Performance Computing (HPC)

4 Location of AEZ 6 AEZ 6

5 Richard Massey Update: 10/22/2014 Croplands of USA (Source: USDA CDL); FAO AEZ 6 Rainfed Classes of 2008: Spatial Distribution ClassRain-fed% AEZ% all crop US% maj crop USClassIrrigated% AEZ% all crop US% maj crop US 1Corn28.24.01054.130811Corn8.71.23991.2771 2Soybeans25.73.65823.768012Soybeans5.20.74610.7685 3Wheat (w)11.81.68431.734913Wheat (w)2.00.28340.2919 4Wheat (s)10.51.49341.538214Wheat (s)0.50.06500.0669 5Wheat (d)3.50.49660.511515Wheat (d)0.10.02010.0207 6Barley1.40.20450.210616Barley0.10.00840.0087 7Potatoes0.00.0011 17Potatoes0.00.0007 8Alfalfa0.90.12150.125218Alfalfa0.50.07820.0805 9Cotton0.70.09370.096519Cotton0.20.02400.0247 10Rice0.00.0000 20Rice0.00.0011

6 Richard Massey Update: 10/22/2014 Croplands of USA (Source: USDA CDL); FAO AEZ 6 Irrigated Classes of 2008: Spatial Distribution ClassRain-fed% AEZ% all crop US% maj crop USClassIrrigated% AEZ% all crop US% maj crop US 1Corn28.24.01054.130811Corn8.71.23991.2771 2Soybeans25.73.65823.768012Soybeans5.20.74610.7685 3Wheat (w)11.81.68431.734913Wheat (w)2.00.28340.2919 4Wheat (s)10.51.49341.538214Wheat (s)0.50.06500.0669 5Wheat (d)3.50.49660.511515Wheat (d)0.10.02010.0207 6Barley1.40.20450.210616Barley0.10.00840.0087 7Potatoes0.00.0011 17Potatoes0.00.0007 8Alfalfa0.90.12150.125218Alfalfa0.50.07820.0805 9Cotton0.70.09370.096519Cotton0.20.02400.0247 10Rice0.00.0000 20Rice0.00.0011

7 Methods: Classification Winter wheat Corn +Soybean NoAEZ=6 No Region subset (.shp) No Temporal/S pectral Window No Max NDVI location= 12±2 No Max NDVI (0.6<NDVI <0.9) Corn/Soyb ean Cropland extent Accuracy Assessme nt Change Paramete rs 1 0 10 10 10 10 No Spring Wheat+Durum Wheat+ Barley NDVI Maximum NDVI window Classification window Unique NDVI 20,000 sample points/crop/AEZ NDVI spectra from CDL 2008 Rules for classifying spectra Grouping of similar crop spectra at 250m Decision tree based classification

8 Accuracy values for Rainfed: 5% of available pure pixel samples Corn + Soybean Spring Wheat+ Durum Wheat + Barley Winter Wheat AlfalfaCotton Other crop Non-cropunclassifiedTotal User’s Accuracy Corn + Soybean 19,43521978932112 2,1381,29024,12780.55 Spring Wheat+ Durum Wheat + Barley 2122,987212204511,2283455,25756.82 Winter Wheat 176442,745121561,4021,0136,84959.08 Alfalfa13532198178310337957.74 Cotton2395211061276624942.57 Other crop2593332121,894321,0043,383- Non-crop1,5071,8232,2131932771291,3954,152301,924- Unclassified1,9783731842795,719-8,699- Total24,0695,1836,8493792923,383301,9248,673350,867- Producer’s accuracy 80.7557.6346.6252.2436.30-----

9 Accuracy values for Irrigated: 5% of available pure pixel samples Corn + Soybean Spring Wheat+ Durum Wheat + Barley Winter Wheat AlfalfaCotton Other crop Non- crop unclassifiedTotal User’s Accuracy Corn + Soybean 6,01721441035 663996,62790.80 Spring Wheat+ Durum Wheat + Barley 664231464018010782651.21 Winter Wheat 54144154017322301,06658.92 Alfalfa4210615213211765.02 Cotton7112789422014162.90 Other crop8910301586103111,028- Non-crop467231856142397,0122098,154- Unclassified141226261224390-694- Total6,6362039851171621,0477,8931,60918,653- Producer’s accuracy 90.6760.5642.1260.4055.05-----

10 Accuracy values for Rainfed crop: one-on-one comparison with CDL 2008 Corn + Soybean Spring Wheat+ Durum Wheat + Barley Winter Wheat AlfalfaCotton Other crop Non-crop Un- classified Total User’s Accuracy Corn + Soybean 401,78112,1197891,0203018,60952,8921,290478,80183.91 Spring Wheat+ Durum Wheat + Barley 7,88862,33214,230122010,56439,109345134,50046.34 Winter Wheat4,9762,00271,9902,0781,2116,05634,2421,713124,26857.93 Alfalfa131,210323,4536074552,0951037,96859.34 Cotton1,7052,3205213,8198762,3226611,13454.30 Other crop259310,944140141,21910,0321,00463,719- Non-crop59,64367,21240,232192,3017716,013,7944,1526,188,124- Unclassified1,978373184105795,719-8,699- Total 478,009147,291138,9536,6888,76568,6296,160,2058,6737,017,213- Producer’s accuracy 84.0542.3251.8161.6343.57-----

11 Accuracy values for Irrigated: one-on-one comparison with CDL 2008 Corn + Soybean Spring Wheat+ Durum Wheat + Barley Winter Wheat AlfalfaCotton Other crop Non-crop Un- classified Total User’s Accuracy Corn + Soybean 109,7632318716613558011,0752,029124,06688.47 Spring Wheat+ Durum Wheat + Barley 1982,3461,910621043363615205,83740.19 Winter Wheat5382288,7656257905,2622,04017,69049.55 Alfalfa927261661,8268841161,7914,88157.41 Cotton1194612610978062364742,36764.50 Other crop1304827205108,2151661,52711,255- Non-crop7,8061,1224,7561,198228994176,4547,118199,676- Unclassified5859411,2601,4533452362,307-7,128- Total 120,0665,83717,6904,8811,49511,255195,67616,000372,900- Producer’s accuracy 91.4240.1949.5559.7858.80-----

12 Moving forward Ensemble of decision trees for each AEZ Rank each pixel for each crop type Final selection based on rank Refining of random samples for each AEZ for noise

13 Thank you!

14 Agro-ecological zones in the US

15 Derive training spectra from USDA Cropland Data Layer (CDL)op classification

16 Richard Massey Update: 10/22/2014 Rainfed Classes of 2008: AEZ6 ClassRain-fed% AEZ% all cropArea (hectares) 1Corn 6.5825.75 4,027,330.76 2Soybeans 6.1924.19 3,784,436.83 3Wheat (w) 3.2512.70 1,985,840.29 4Wheat (s) 3.1712.38 1,936,972.28 5Wheat (d) 0.923.60 563,630.90 6Barley 0.552.14 334,157.25 7Potatoes 0.010.02 3,729.93 8Alfalfa 0.712.79 436,610.37 9Cotton 0.230.88 137,730.08 10Rice 0.00 501.59 Total 21.61 84.4613,210,940.00

17 Richard Massey Update: 10/22/2014 Irrigated Classes of 2008: AEZ6 ClassIrrigated% AEZ% all cropArea (Hectares) 11Corn 1.736.76 1,057,337.54 12Soybeans 1.194.67 729,807.72 13Wheat (w) 0.532.07 324,104.04 14Wheat (s) 0.140.53 83,429.92 15Wheat (d) 0.040.16 25,463.87 16Barley 0.030.10 15,597.42 17Potatoes 0.010.03 4,551.69 18Alfalfa 0.240.96 149,677.61 19Cotton 0.060.25 39,289.70 20Rice 0.000.01 1,211.29 Total 3.9715.54 2,430,471.00

18 Corn + Soybean classification results Producer'sUser's CropTypevalidation Classified pixels CDL 2008 (resampled)Percent %Accuracy % corn + soybeanIrrigatedall pixels342838334916 102.37 95.5291.63 corn + soybeanRainfedall pixels15530431463947 106.09 85.6287.03 corn + soybeanIrrigatedrandom 5%342838334916 102.37 94.9592.71 corn + soybeanRainfedrandom 5%15530431463947 106.09 85.8387.09 Training pixels Validation pixels Corn +soybean 20,00023,990

19 Classification: Decision tree Winter wheat (AEZ6) NoAEZ=6 No Temporal/Spectral Window (4-18) No Max NDVI location=10±2 No Max NDVI (0.4<NDVI<0.8) Winter wheat Cropland extent Accuracy Assessment Change Parameters 1 0 10 10 10 No

20 Classification: Decision tree Spring Wheat + durum wheat + barley (AEZ6) NoAEZ=6 No Temporal/Spectral Window (6-23) No Max NDVI location=12±2 No Max NDVI (0.5<NDVI<0.9) Sp wheat/ dur wheat/ barley Cropland extent Accuracy Assessment Change Parameters 1 0 10 10 10 No

21 Classification: Decision tree Alfalfa(AEZ6) NoAEZ=6 No Temporal/Spectral Window (6-23) No Cum. NDVI > 8.5 No Max NDVI (0.7<NDVI<0.9) Alfalfa Cropland extent Accuracy Assessment Change Parameters 1 0 10 10 10 No

22 Randomly selected pixels for training Rainfed crop type for 2008 ClassCropAEZ3AEZ4AEZ5AEZ6AEZ7AEZ8AEZ9AEZ10AEZ11Total 1Corn2,96910,000 - 72,969 2Soybean -1,02610,000 71,026 3Winter Wheat10,000 3,91210,0008473,996 4Spring Wheat10,000 - -70,008 5Durum Wheat-1,0057,44310,000-66 - - -18,581 6Barley7,0188,5666,1279,3763,3832,278 -- 36,750 7Potato5,9149,9221,2882492791,065468138-19,345 8Alfalfa10,000 9,2957,5652,9171,613-61,406 Total42,96849,49344,85849,62532,98830,9747,30521,753122

23 Random sample points for training Irrigated crop type for 2008 ClassCropAEZ3AEZ4AEZ5AEZ6AEZ7AEZ8AEZ9AEZ10AEZ11Total 11Corn1,0356,54110,000 3,60210,000 5,15166,329 12Soybean -14210,000 7,3331,96210,000 3,21752,654 13Winter Wheat2,08210,000 4,1323,3091,544618377-32,062 14Spring Wheat9563,1013,3871,582305157-- -9,488 15Durum Wheat-210360318-- - - -888 16Barley1,2391,866534350-- -- 3,989 17Potato2,1543,546248--102---6,050 18Alfalfa3,7287,9045,9674,4232,390220---24,632 19Cotton--4,253821332-10,0003,75812219,286 20Rice ---738,1637,08210,0001,5001,81628,634 Total11,19433,31044,74931,69931,83214,66940,61825,63510,306

24 Random samples for validation (Rainfed, AEZ6) CropClass Random sample (5 % of Pure crop pixels) Pure crop pixelsMODIS pixels RainfedCorn112,589250,491754,733 Soybean211,413228,335709,214 Winter Wheat35,242105,130372,152 Spring Wheat44,65993,211362,994 Durum Wheat51,54830,998105,626 Barley664112,76462,622 Potato73124699 Alfalfa83777,58681,822 Cotton92755,84725,811 Rice100394 Other Crops213,42067,660288,803 Non Crops22310,8846,215,1917,766,576 All pixels 351,0517,017,34010,531,146 All crop pixels 40,167802,1492,764,570

25 CropClass Random sample (5 % of Pure crop pixels) Pure crop pixelsMODIS pixels IrrigatedCorn113,81077,497198,148 Soybean122,33246,569136,768 Winter Wheat1389917,69060,738 Spring Wheat142044,05515,635 Durum Wheat15651,2554,772 Barley16245272,923 Potato17897853 Alfalfa182464,88128,050 Cotton19921,4957,363 Rice20467227 Other Crops2352611,25568,125 Non Crops2410,259207,676407,208 All pixels 14,659295,567732,662 All crop pixels 4,40087,891325,454 Random samples for validation (Irrigated, AEZ6)

26 Classified map: AEZ 6 (rainfed) ClassRain-fed% AEZ% all cropArea (Hectares) 1Corn 13.5541.02 8,153,838.28 2Soybeans 00 3Wheat (w) 7.8323.71 5,411,840.60 4Wheat (s) 10.4431.60 4,210,177.56 5Wheat (d) 00 6Barley 00 7Potatoes 00 8Alfalfa 1.213.66737,827.88 9Cotton 00 10Rice 00

27 Classified map: AEZ 6 (irrigated) Class Irrigated% AEZ% all crop USArea (Hectares) 111Corn 5.8473.92 1,857,352.34 212Soybeans 00 313Wheat (w) 1.2315.56 227,419.25 414Wheat (s) 0.425.31 754,839.37 515Wheat (d) 00 616Barley 00 717Potatoes 00 818Alfalfa 0.415.19241,896.09 919Cotton 00 1020Rice 00

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