The single largest source of dams in the United States is the National Inventory of Dams (NID) < http://nid.usace.army.mil> from the US Army Corps of Engineers. Entire data from the NID cannot be obtained all at once and NID's website limits extraction of more than a couple of thousand records at a time. Moreover, selected data from the NID's user interface cannot not be saved to a file. In order to make the analysis of this data easier, all the data from NID was extracted manually. Subsequently, the raw data was checked for potential errors and cleaned. This package provides sample cleaned data from the NID and provides functionality to access the entire cleaned NID data.
Converted vignette to Rmd
Remade docs with roxygen2
Package no longer contains data sample subset and
extract_nid no longer references it.
NEWS.md file to track changes to the package.
Data from NID was downloaded in March 2014.
NID's website claims to have more than 80,000 dams; however, only 74,000 dams could be obtained from the website's UI.
Package comes with sample data; entire dataset available on bitbucket.org/rationshop