HydroData: Earth Systems Data in R 
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_sfstr(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).