Multipurpose function to find a COMID of interest.

discover_nhdplus_id(point = NULL, nldi_feature = NULL, raindrop = FALSE)

Arguments

point

sfc POINT including crs as created by: sf::st_sfc(sf::st_point(.. ,..), crs)

nldi_feature

list with names `featureSource` and `featureID` where `featureSource` is derived from the "source" column of the response of get_nldi_sources and the `featureSource` is a known identifier from the specified `featureSource`.

raindrop

logical if TRUE will call a raindrop trace web service and return will be the same as get_raindrop_trace with direction "none".

Value

integer COMID or list containing COMID and raindrop trace.

Examples

# \donttest{
point <- sf::st_sfc(sf::st_point(c(-76.874, 39.482)), crs = 4326)
discover_nhdplus_id(point)
#> [1] 11689978

discover_nhdplus_id(point, raindrop = TRUE)
#> Simple feature collection with 2 features and 7 fields
#> Geometry type: LINESTRING
#> Dimension:     XY
#> Bounding box:  xmin: -76.88292 ymin: 39.47138 xmax: -76.86733 ymax: 39.49148
#> Geodetic CRS:  WGS 84
#> # A tibble: 2 × 8
#>   id       gnis_name   comid reachcode raindrop_pathDi… measure intersection_po…
#>   <chr>    <chr>       <int> <chr>                <dbl>   <dbl> <list>          
#> 1 nhdFlow… North Br…  1.17e7 02060003…             62.6    53.9 <dbl [2]>       
#> 2 raindro… NA        NA      NA                    NA      NA   <dbl [0]>       
#> # … with 1 more variable: geometry <LINESTRING [°]>

nldi_nwis <- list(featureSource = "nwissite", featureID = "USGS-08279500")
discover_nhdplus_id(nldi_feature = nldi_nwis)
#> [1] 17864756
# }