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HydroData: Earth Systems Data in R <img src="man/figures/logo.png" width=160 height = 120 align="right" />

HydroData is designed to help (1) find, (2) get, (3) visualize, and (4) format disparate earth systems data through a core language (R); a common geospatial reference (ESPG:4629) ; and unifying vocabulary built around querying data by an area of interest (AOI). The package supports access to 20+ National/Global data sources.

All functions are designed to work with the AOI package and magrittr pipe operation %>% allowing successive HydroData calls to be directly chained to an area of interest:

Number	Dataset	Description	Format
1	GHCN	Global Historical Climate Network	Vector point
2	International Airports	OpenFlights Geo-database	Vector point
3	NID	National Inventory of Dams (USACE)	Vector point
4	NWIS	National Water Information System Site Index	Vector point
5	Snotel	The NRCS Snow Measurement Stations	Vector point
6	GagesII	Geospatial Attributes of Gages for Evaluating Streamflow	Vector point, line
7	NLDI	The Network Linked Data Index	Vector point, line, polygon
8	TIGER	2017 US Census Bureau Road Network	Vector line
9	NHDPlus	National Hydrography Dataset Waterbodies, River Network, Catchments	Vector line, polygon
10	EPA Basins	Environmental Protection Agency NWIS drainage basins	Vector polygon
11	SSURGO	National Cooperative Soil Survey Geospatial Soil Data Base	Vector polygon
12	WBD	The Watershed Boundary Dataset (all HUC levels)	Vector polygon
13	CDL	USDA Crop Data Layers (2008 - 2017)	Raster
14	NED	National Elevation Dataset (10 and 30 meter resolutions)	Raster
15	NLCD	National Land Cover Dataset (01,06,11) (Impervious, canopy, Land cover)	Raster

myData = getAOI(clip = list("UCSB", 10, 10)) %>% 
findNHD() %>% 
findWaterbodies %>% 
findNWIS %>% 
findNED()

str(myData,max.level = 2)

List of 5
 $ AOI        :Formal class 'SpatialPolygons' [package "sp"] with 4 slots
 $ nhd        :Formal class 'SpatialLinesDataFrame' [package "sp"] with 4 slots
 $ waterbodies:Formal class 'SpatialPolygonsDataFrame' [package "sp"] with 5 slots
 $ nwis       :Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots
 $ NED        :Formal class 'RasterLayer' [package "raster"] with 12 slots
 - attr(*, "class")= chr "HydroData"

For now, most internal HydroData operations are based of the 'simple feature (sf)' library however objects are all returned as Spatial* sp objects. As the community around simple features grows the default output of 'HydroData' might change. Until then users can use the to_sf function to convert a HydroData object to simple features where appropriate.

HydroData offer in-package tools for generating interactive visualizations of HydroData Spatial* objects

myData.sf = myData %>% to_sf

str(myData.sf,max.level = 1)

List of 5
 $ NED        :Formal class 'RasterLayer' [package "raster"] with 12 slots
 $ AOI        :Classes ‘sf’ and 'data.frame':	1 obs. of  1 variable:
  ..- attr(*, "sf_column")= chr "geometry"
  ..- attr(*, "agr")= Factor w/ 3 levels "constant","aggregate",..: 
  .. ..- attr(*, "names")= chr(0) 
 $ nhd        :Classes ‘sf’ and 'data.frame':	100 obs. of  92 variables:
  ..- attr(*, "sf_column")= chr "geometry"
  ..- attr(*, "agr")= Factor w/ 3 levels "constant","aggregate",..: NA NA NA NA NA NA NA NA NA NA ...
  .. ..- attr(*, "names")= chr [1:91] "id" "ogc_fid" "comid" "fdate" ...
 $ waterbodies:Classes ‘sf’ and 'data.frame':	11 obs. of  24 variables:
  ..- attr(*, "sf_column")= chr "geometry"
  ..- attr(*, "agr")= Factor w/ 3 levels "constant","aggregate",..: NA NA NA NA NA NA NA NA NA NA ...
  .. ..- attr(*, "names")= chr [1:23] "id" "objectid" "comid" "fdate" ...
 $ nwis       :Classes ‘sf’ and 'data.frame':	3 obs. of  8 variables:
  ..- attr(*, "sf_column")= chr "geometry"
  ..- attr(*, "agr")= Factor w/ 3 levels "constant","aggregate",..: NA NA NA NA NA NA NA
  .. ..- attr(*, "names")= chr [1:7] "OBJECTID" "feature_id" "site_no" "site_name" ...

HydroData offer in-package tools for generating interactive visualizations of HydroData Spatial* objects

 myData %>% explore()

To download and get started with HydroData, install from GitHub using the devtools packages:

library(devtools)
install_github("mikejohnson51/HydroData")

Support:

HydroData is written by Mike Johnson, a graduate Student at the University of California, Santa Barbara in Keith C. Clarke's Lab, 2018 and is funded through the NOAA National Water Center (NWC) via the UCAR COMET Program (2017/18).