read_gdal_table: Read attributes from source as a data frame

In r-gris/gladr: Use GDAL With R Code

Description

See here for SQL details http://www.gdal.org/ogr_sql.html

Usage

read_gdal_table(dsource, layer = 0, sql = NULL)

Arguments

dsource	data source string
layer	layer index (0)
sql	optional sql query executed against the data source

Examples

f <- system.file("extdata", "point.shp", package = "vapour")
read_gdal_table(f, sql = "SELECT * FROM point WHERE FID > 4 AND FID < 8")
file <- "list_locality_postcode_meander_valley.tab"
mvfile <- system.file(file.path("extdata/tab", file), package="vapour")
read_gdal_table(mvfile, sql = "SELECT NAME, PLAN_REF, SHAPE_AREA * 2 AS area FROM list_locality_postcode_meander_valley WHERE POSTCODE < 7304")
read_gdal_table(mvfile)

r-gris/gladr documentation built on May 26, 2019, 1:33 p.m.