import(sp,raster,rgdal,rgeos, data.table, devtools, soilDB, RCurl)
export(get_ghcn_daily)
export(download_ghcn_daily_station)
export(get_ghcn_daily_station)
export(get_ghcn_inventory)
export(get_itrdb)
export(download_itrdb)
export(read_crn)
export(read_crn_metadata)
export(read_crn_data)
export(get_ned)
export(download_ned_tile)
export(get_ned_tile)
export(get_nhd)
export(download_huc4)
export(get_huc4)
export(download_nhd_subregion)
export(get_nhd_subregion)
export(get_ssurgo)
export(download_ssurgo_inventory)
export(get_ssurgo_inventory)
export(download_ssurgo_study_area)
export(get_ssurgo_study_area)
export(extract_ssurgo_data)
export(pkg_test)
export(substr_right)
export(polygon_from_extent)
export(spdf_from_polygon)
export(sequential_duplicated)
export(curl_download)