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Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data
 
 
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Correction

Correction: Wang, J., et al. Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data. Remote Sens. 2016, 8, 931

1
Institute of Remote Sensing and Information Application, Zhejiang University, Hangzhou 310058, China
2
Jiangsu Meteorological Bureau, Nanjing 210008, China
3
Department of Agro-Meteorology and Geo-Informatics, Magbosi Land, Water and Environment Research Center (MLWERC), Sierra Leone Agricultural Research Institute (SLARI), Freetown PMB 1313, Sierra Leone
*
Author to whom correspondence should be addressed.
Remote Sens. 2017, 9(2), 94; https://doi.org/10.3390/rs9020094
Submission received: 15 December 2016 / Revised: 15 December 2016 / Accepted: 14 January 2017 / Published: 24 January 2017
(This article belongs to the Special Issue Earth Observations for Precision Farming in China (EO4PFiC))
The authors wish to make the following corrections to their paper [1]. Due to miscalculating, please replace:
Table 4. Results of regression models at different single-cropped rice (SCR) growth stages.
Table 4. Results of regression models at different single-cropped rice (SCR) growth stages.
Growth StagesLAIAGB
VIModel R C V 2 RRMSECVVIModel R C V 2 RRMSECV
All stagesEVI2E0.35810.210cu EVI2Q0.92359.912
B0.36210.193B0.91860.586
S0.4449.968S0.921107.08
NDVIE0.27510.798cu NDVIQ0.92957.856
B0.33410.460B0.92258.984
S0.46710.185S0.927105.371
Before headingEVI2E0.8316.074cu EVI2Q0.90954.037
B0.9266.152B0.90157.484
S0.9006.776S0.88496.317
NDVIP0.6448.960cu NDVIQ0.92250.150
B0.6159.023B0.90253.759
S0.62910.363S0.92086.899
After headingEVI2E0.4218.036cu EVI2Q0.48161.331
B0.4748.019B0.47465.122
S0.4168.205S0.57160.499
NDVIE0.4967.607cu NDVIQ0.51659.562
B0.6108.630B0.42653.759
S0.6577.076S0.57359.378
E, P, and Q denote exponential, power, and quadratic polynomial fit of the traditional regression methods, respectively; B, S denote BPNN and SVM regression methods, respectively.
with
Table 4. Results of regression models at different single-cropped rice (SCR) growth stages.
Table 4. Results of regression models at different single-cropped rice (SCR) growth stages.
Growth StagesLAIAGB
VIModel R C V 2 RRMSECVVIModel R C V 2 RRMSECV
All stagesEVI2E0.35810.210cu EVI2Q0.92318.247
B0.36210.193B0.91818.452
S0.4449.968S0.92132.613
NDVIE0.27510.798cu NDVIQ0.92917.621
B0.33410.460B0.92217.964
S0.46710.185S0.92732.092
Before headingEVI2E0.8316.074cu EVI2Q0.90925.317
B0.9266.152B0.90126.932
S0.9006.776S0.88445.126
NDVIP0.6448.960cu NDVIQ0.92223.496
B0.6159.023B0.90225.187
S0.62910.363S0.92040.714
After headingEVI2E0.4218.036cu EVI2Q0.48115.067
B0.4748.019B0.47415.998
S0.4168.205S0.57114.862
NDVIE0.4967.607cu NDVIQ0.51614.632
B0.6108.630B0.42613.207
S0.6577.076S0.57314.587
E, P, and Q denote exponential, power, and quadratic polynomial fit of the traditional regression methods, respectively; B, S denote BPNN and SVM regression methods, respectively.
Please also replace:
Figure 4. Relationships between measured rice leaf area index (m2/m2) and dry aboveground biomass (g/m2) at different rice growth stages with VIs. (a) Before heading LAI estimation using EVI2-BPNN regression; (b) after heading LAI estimation using NDVI-SVM regression; (c) all-growth stage AGB estimation using daily cumulative NDVI and based on the quadratic polynomial fit function; (d) all-growth stage AGB estimation using 10-day composite data and based on the cumulative NDVI quadratic polynomial fit function. The black dash lines are the 45° lines, and the red solid lines are the linear regression trend lines.
Figure 4. Relationships between measured rice leaf area index (m2/m2) and dry aboveground biomass (g/m2) at different rice growth stages with VIs. (a) Before heading LAI estimation using EVI2-BPNN regression; (b) after heading LAI estimation using NDVI-SVM regression; (c) all-growth stage AGB estimation using daily cumulative NDVI and based on the quadratic polynomial fit function; (d) all-growth stage AGB estimation using 10-day composite data and based on the cumulative NDVI quadratic polynomial fit function. The black dash lines are the 45° lines, and the red solid lines are the linear regression trend lines.
Remotesensing 09 00094 g001
with
Figure 4. Relationships between measured rice leaf area index (m2/m2) and dry aboveground biomass (g/m2) at different rice growth stages with VIs. (a) Before heading LAI estimation using EVI2-BPNN regression; (b) after heading LAI estimation using NDVI-SVM regression; (c) all-growth stage AGB estimation using daily cumulative NDVI and based on the quadratic polynomial fit function; (d) all-growth stage AGB estimation using 10-day composite data and based on the cumulative NDVI quadratic polynomial fit function. The black dash lines are the 45° lines, and the red solid lines are the linear regression trend lines.
Figure 4. Relationships between measured rice leaf area index (m2/m2) and dry aboveground biomass (g/m2) at different rice growth stages with VIs. (a) Before heading LAI estimation using EVI2-BPNN regression; (b) after heading LAI estimation using NDVI-SVM regression; (c) all-growth stage AGB estimation using daily cumulative NDVI and based on the quadratic polynomial fit function; (d) all-growth stage AGB estimation using 10-day composite data and based on the cumulative NDVI quadratic polynomial fit function. The black dash lines are the 45° lines, and the red solid lines are the linear regression trend lines.
Remotesensing 09 00094 g002
These changes have no material impact on the conclusions of our paper. We apologize to our readers for the inconvenience. The manuscript will be updated and the original will remain online on the article webpage.

Reference

  1. Wang, J.; Huang, J.F.; Gao, P.; Wei, C.W.; Mansaray, L.R. Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data. Remote Sens. 2016, 8, 931. [Google Scholar] [CrossRef]

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MDPI and ACS Style

Wang, J.; Huang, J.; Gao, P.; Wei, C.; Mansaray, L.R. Correction: Wang, J., et al. Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data. Remote Sens. 2016, 8, 931. Remote Sens. 2017, 9, 94. https://doi.org/10.3390/rs9020094

AMA Style

Wang J, Huang J, Gao P, Wei C, Mansaray LR. Correction: Wang, J., et al. Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data. Remote Sens. 2016, 8, 931. Remote Sensing. 2017; 9(2):94. https://doi.org/10.3390/rs9020094

Chicago/Turabian Style

Wang, Jing, Jingfeng Huang, Ping Gao, Chuanwen Wei, and Lamin R. Mansaray. 2017. "Correction: Wang, J., et al. Dynamic Mapping of Rice Growth Parameters Using HJ-1 CCD Time Series Data. Remote Sens. 2016, 8, 931" Remote Sensing 9, no. 2: 94. https://doi.org/10.3390/rs9020094

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