output	github_document

Hydrofabric Utilities

hfutils provides the base utilities needed for hydrofabric I/O + navigation; geometry modification + cleaning; and authentication to the Lynker Spatial cloud. Collectively, it provides the building blocks from which reference fabrics and geoprocessed fabrics can be created.

Installation

You can install the development version of hfutils from GitHub with:

# install.packages("remotes")
remotes::install_github("lynker-spatial/hfutils")

library(hfutils)
library(dplyr)
library(sf)

Basic Use

I/O

Basic connection: Dataset

# point this at a hydrofabric GeoPackage (with flowpaths + divides layers)
gpkg <- "reference_fabric.gpkg"

# With a single user layer, that layer is selected automatically. A source
# holding several layers is ambiguous, so as_ogr() lists them and asks you
# to name one.
hfutils::as_ogr(gpkg)
#> Error: Multiple layers found; please specify `layer` explicitly:
#> > divides, flowpaths

Basic connection: Layer

hfutils::as_ogr(gpkg, "divides")

Lazy Eval

hfutils::as_ogr(gpkg, "divides") |>
  select(divide_id, areasqkm)

sf extraction

hfutils::as_ogr(gpkg, "divides")  |>
  filter(vpuid == "01") |>
  st_as_sf()

Network Properties

## Accumulate Downstream
system.time({
  da <-  hfutils::as_ogr(gpkg, "flowpaths")  |>
    filter(vpuid == "01") |>
    st_as_sf() |>
    accumulate_downstream(attr = "areasqkm")
})

head(da)

## Hydrosequence
system.time({
  hs <-  hfutils::as_ogr(gpkg, "flowpaths")  |>
    filter(vpuid == "01") |>
    st_as_sf() |>
    get_hydroseq()
})

head(hs)

Questions?

Please reach out via an issue or PR if you have comments, concerns, or questions!