sedona_range_query: Execute a range query.

In apache.sedona: R Interface for Apache Sedona

Execute a range query.

Description

Given a spatial RDD and a query object x, find all spatial objects within the RDD that are covered by x or intersect x.

Usage

sedona_range_query(
  rdd,
  x,
  query_type = c("cover", "intersect"),
  index_type = c("quadtree", "rtree"),
  result_type = c("rdd", "sdf", "raw")
)

Arguments

rdd	A Sedona spatial RDD.
x	The query object.
query_type	Type of spatial relationship involved in the query. Currently "cover" and "intersect" are supported.
index_type	Index to use to facilitate the KNN query. If NULL, then do not build any additional spatial index on top of x. Supported index types are "quadtree" and "rtree".
result_type	Type of result to return. If "rdd" (default), then the k nearest objects will be returned in a Sedona spatial RDD. If "sdf", then a Spark dataframe containing the k nearest objects will be returned. If "raw", then a list of k nearest objects will be returned. Each element within this list will be a JVM object of type org.locationtech.jts.geom.Geometry.

Value

The range query result.

See Also

Other Sedona spatial query: sedona_knn_query()

Examples

library(sparklyr)
library(apache.sedona)

sc <- spark_connect(master = "spark://HOST:PORT")

if (!inherits(sc, "test_connection")) {
  range_query_min_x <- -87
  range_query_max_x <- -50
  range_query_min_y <- 34
  range_query_max_y <- 54
  geom_factory <- invoke_new(
    sc,
    "org.locationtech.jts.geom.GeometryFactory"
  )
  range_query_polygon <- invoke_new(
    sc,
    "org.locationtech.jts.geom.Envelope",
    range_query_min_x,
    range_query_max_x,
    range_query_min_y,
    range_query_max_y
  ) %>%
    invoke(geom_factory, "toGeometry", .)
  input_location <- "/dev/null" # replace it with the path to your input file
  rdd <- sedona_read_geojson_to_typed_rdd(
    sc,
    location = input_location,
    type = "polygon"
  )
  range_query_result_sdf <- sedona_range_query(
    rdd,
    x = range_query_polygon,
    query_type = "intersect",
    index_type = "rtree",
    result_type = "sdf"
  )
}

apache.sedona documentation built on Sept. 11, 2024, 5:24 p.m.