# Tools for working with the National Hydrography Dataset

## Documentation for package ‘nhdR’ version 0.5.3

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

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_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_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
toUTM | Re-project to appropriate UTM zone
vpu_shp | Low-res simple features data frame of the NHDPlus vector processing units