This map is an in-season crop type map for Iowa commodity crops, predicted based on Harmonized Landsat and Sentinel-2 (HLS) observations through August 2020 using the machine learning method described in Kerner et al., 2020 [1]. Each 30m pixel gives a label of corn (0), soybean (1), or other (2). The "other" class includes crops that are not corn or soybean as well as other land cover types (i.e., "other" means the pixel is not corn or soybean).
[1] Kerner, H. R., Sahajpal, R., Skakun, S., Becker-Reshef, I., Barker, B., Hosseini, M. (2020). Resilient In-Season Crop Type Classification in Multispectral Satellite Observations using Growth Stage Normalization. ACM SIGKDD Conference on Knowledge Discovery and Data Mining Workshops, https://arxiv.org/abs/2009.10189.