U.S. flag

An official website of the United States government

icon-dot-gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

icon-https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Spatial Extent of Data

Other Subject Keywords

Place Keywords

Accuracy of Rapid Crop Cover Maps of Conterminous United States for 2008 - 2016

Spatially accurate annual crop cover maps are an important component to various planning and research applications; however, the importance of these maps varies significantly with the timing of their availability. Utilizing a previously developed crop classification model (CCM), which was used to generate historical annual crop cover maps (classifying nine major crops: corn, cotton, sorghum, soybeans, spring wheat, winter wheat, alfalfa, other hay/non alfalfa, fallow/idle cropland, and ‘other’ as one class for remaining crops), we hypothesized that such crop cover maps could be generated in near real time (NRT). The CCM was trained on 14 temporal and 15 static geospatial datasets, known as predictor variables, and the National Agricultural Statistics Service (NASS) Cropland Data Layers (CDL) was used as the dependent variable. We were able to generate a NRT crop cover map by the first day of September through a process of incrementally removing weekly and monthly data from the CCM and comparing the subsequent map results with the original maps and NASS CDLs. Initially, our NRT results revealed training error of 1.4% and test error of 8.3%, as compared to 1.0% and 7.6%, respectively for the original CCM. Through the implementation of a new 'two-mapping model' approach, we were able to substantially improve the results of the NRT crop cover model. We divided the NRT model into one 'crop type model' to handle the classification of the nine specific crops and a second, binary model to classify crops as presence or absence of the ‘other’ crop. Under the two-mapping model approach, the training errors were 0.8% and 1.5% for the crop type and binary model, respectively, while test errors were 5.5% and 6.4% for crop type and binary model, respectively. With overall mapping accuracies for annual maps reaching in 60s to 70s percent, this approach shows strong potential for generating crop type maps of current year in September.

Get Data and Metadata
Author(s) Devendra Dahal (CTR) orcid, Bruce K Wylie orcid, Danny Howard (CTR) orcid
Publication Date 2018
Beginning Date of Data 2008
Ending Date of Data 2016
Data Contact
DOI https://doi.org/10.5066/F7B27TG8
Citation (CTR), D.D., Wylie, B.K., and (CTR), D.H., 2018, Accuracy of Rapid Crop Cover Maps of Conterminous United States for 2008 - 2016: U.S. Geological Survey data release, https://doi.org/10.5066/F7B27TG8.
Metadata Contact
Metadata Date 2020-08-18
Related Publication
Citations of these data

Loading https://doi.org/10.1038/s41598-018-26284-w

Access public
License http://www.usa.gov/publicdomain/label/1.0/
Loading...
Harvest Source: ScienceBase
Harvest Date: 2024-07-05T04:03:10.086Z