ms_explode: Convert multipart lines or polygons to singlepart
In ateucher/rmapshaper: Client for 'mapshaper' for 'Geospatial' Operations

ms_explode

R Documentation

Convert multipart lines or polygons to singlepart

Description

For objects of class Spatial (e.g., SpatialPolygonsDataFrame), you may find it faster to use sp::disaggregate.

Usage

ms_explode(input, ...)

Arguments

input

One of:

geo_json or character multipart lines, or polygons;
multipart SpatialPolygons, SpatialLines;
sf or sfc multipart lines, or polygons object

...

Arguments passed on to apply_mapshaper_commands

force_FC: should the output be forced to be a FeatureCollection (or sf object or Spatial*DataFrame) even if there are no attributes? Default TRUE. If FALSE and there are no attributes associated with the geometries, a GeometryCollection (or Spatial object with no dataframe, or sfc) will be output.
sys: Should the system mapshaper be used instead of the bundled mapshaper? Gives better performance on large files. Requires the mapshaper node package to be installed and on the PATH.
sys_mem: How much memory (in GB) should be allocated if using the system mapshaper (sys = TRUE)? Default 8. Ignored if sys = FALSE. This can also be set globally with the option "mapshaper.sys_mem"
quiet: If sys = TRUE, should the mapshaper messages be silenced? Default FALSE. This can also be set globally with the option "mapshaper.sys_quiet"
gj2008: Generate output that is consistent with the pre-RFC 7946 GeoJSON spec (dating to 2008). Polygon rings are CW and holes are CCW, which is the opposite of the default RFC 7946-compatible output.

Details

There is currently no method for SpatialMultiPoints

Value

same class as input

Examples

library(geojsonsf)
library(sf)

poly <- "{\"type\":\"FeatureCollection\",\"features\":
          [\n{\"type\":\"Feature\",\"geometry\":{\"type\":
          \"MultiPolygon\",\"coordinates\":[[[[102,2],[102,3],
          [103,3],[103,2],[102,2]]],[[[100,0],[100,1],[101,1],
          [101,0],[100,0]]]]},\"properties\":{\"a\":0}}\n]}"

poly <- geojson_sf(poly)
plot(poly)
length(poly)
poly

# Explode the polygon
out <- ms_explode(poly)
plot(out)
length(out)
out

ateucher/rmapshaper documentation built on Nov. 2, 2023, 4:23 p.m.