Description Usage Arguments Examples
View source: R/read_gdal_vector.R
See here for SQL details http://www.gdal.org/ogr_sql.html
1 | read_gdal_table(dsource, layer = 0, sql = NULL)
|
dsource |
data source string |
layer |
layer index (0) |
sql |
optional sql query executed against the data source |
1 2 3 4 5 6 | 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)
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