Erratum: Maresma, A., et al. Analysis of Vegetation Indices to Determine Nitrogen Application and Yield Prediction in Maize (Zea mays L.) from a Standard UAV Service. Remote Sens. 2017, 9, 648

After publication of the research paper [1], the authors noticed an error and wish to make the following correction. In Section 2.3 Remote and Proximal Sensing Data Acquisition and Analysis, there is a mistake in the representation of the WDRVI formula. The denominator should be ‘+ Red’ rather than ‘– Red’. The formula therefore should read as follows: WDRVI = (α · NIR − Red)/(α · NIR + Red). The authors did, however, use the correct formula for the analysis, therefore, the experimental results presented and the overall conclusions of the paper are not affected by this change. The original manuscript [1] will be updated and will remain on the article webpage, with a reference to this Correction. We apologize for any inconvenience caused by this mistake.