| nhdR-package | R interface to the National Hydrography Dataset |
| bbox2poly | Convert a bounding box to polygon |
| extract_network | Return nhd plus stream network upstream of a waterbody |
| find_state | find_state |
| find_vpu | Find VPU |
| great_lakes | Data and spatial polygons of the Great Lakes |
| gull | List of simple features lake polygons and flowlines within a buffer around Gull Lake Michigan. |
| gull_flow | Flowlines within a buffer around Gull Lake Michigan including flow information. |
| leaf_reaches | Return leaf reaches from a network or query intersecting lake |
| mendota | List of simple features lake polygons and flowlines within a buffer around Lake Mendota. |
| mendota_network | Upstream flowlines connected to Lake Mendota. |
| nhdR | R interface to the National Hydrography Dataset |
| nhd_dl_state | nhd_dl_state |
| nhd_get | Download and cache NHD data by state |
| nhd_info | Return NHD layer metadata and field listing |
| nhd_list | List available locally cached NHD layers per state |
| nhd_load | Load NHD layers into current session |
| nhd_plus_get | Download and cache NHDplus data by vector processing unit |
| nhd_plus_info | Return NHDplus layer metadata and field listing |
| nhd_plus_list | List available locally cached NHDplus layers per state |
| nhd_plus_load | Load NHDplus layers into current session |
| nhd_plus_query | Select NHDplus features via polygon or circular buffer of coordinate pair |
| nhd_query | Select NHD features clipped by a circular buffer a coordinate pair |
| select_point_overlay | Select features clipped by a point buffer around a point |
| select_poly_overlay | Select features clipped by a polygon |
| sunapee | List of simple features lake polygons and flowlines within a buffer around Lake Sunapee. |
| sunapee_network | Upstream flowlines connected to Lake Sunapee. |
| terminal_reaches | Return terminal reaches from collection intersecting lake |
| tip_reaches | Return tip reaches from a network |
| toUTM | Re-project to appropriate UTM zone |
| vpu_shp | Low-res simple features data frame of the NHDPlus vector processing units |