In jsta/LAGOSextra: Extra functions to interact with the GIS module of LAGOSNE

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LAGOSNEgis

Extra functions to interact with the GIS module of LAGOSNE.

Features

• Easy: Convenience functions allow for straight-forward subsetting.

• Fast: Queries are optimized for speed to avoid loading the entirety of massive layers.

• Flexible : Custom queries can be constructed using SQL statements.

Installation

remotes::install_github("cont-limno/LAGOSNEgis")

Usage

library(LAGOSNEgis)

Download data

lagosnegis_get()

List available GIS layers

library(sf)
sf::st_layers(LAGOSNEgis:::lagosnegis_path())

ly <- sf::st_layers(LAGOSNEgis:::lagosnegis_path())
knitr::kable(data.frame(ly[c("name", "driver", "features", "fields")]))

Query from a specfic layer

res_iws  <- query_gis(layer = "IWS", 
                      id_name = "lagoslakeid", ids = c(34352))
res_lake <- query_gis(layer = "LAGOS_NE_All_Lakes_4ha", 
                      id_name = "lagoslakeid", ids = 34352)
res_pnt  <- query_gis(layer = "LAGOS_NE_All_Lakes_4ha_POINTS", 
                      id_name = "lagoslakeid", ids = 34352)

Query a combined watershed and lake polygon

res <- query_wbd(lagoslakeid = c(7010))

Flexible queries using SQL statements

res <- query_gis_(query = "SELECT * FROM IWS WHERE lagoslakeid IN ('7010');")

References

Soranno P., K. Cheruvelil. 2017. LAGOS-NE-GIS v1.0: A module for LAGOS-NE, a multi-scaled geospatial and temporal database of lake ecological context and water quality for thousands of U.S. Lakes: 2013-1925. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/fb4f5687339bec467ce0ed1ea0b5f0ca. Dataset accessed 9/26/2017.

jsta/LAGOSextra documentation built on Aug. 12, 2021, 12:22 p.m.