lawn_simplify: Simplify GeoJSON data

In lawn: Client for 'Turfjs' for 'Geospatial' Analysis

Description

Takes a data-LineString or data-Polygon and returns a simplified version.

Usage

lawn_simplify(
  feature,
  tolerance = 0.01,
  high_quality = FALSE,
  mutate = FALSE,
  lint = FALSE
)

Arguments

feature	A data-Feature<(data-LineString, data-Polygon, data-MultiLineString, data-MultiPolygon)>, or data-FeatureCollection, or data-GeometryCollection
tolerance	(numeric) Simplification tolerance. Default value is 0.01.
high_quality	(boolean) Whether or not to spend more time to create a higher-quality simplification with a different algorithm. Default: FALSE
mutate	(boolean) allows GeoJSON input to be mutated (significant performance increase if TRUE). Default: FALSE
lint	(logical) Lint or not. Uses geojsonhint. Takes up increasing time as the object to get linted increases in size, so probably use by default for small objects, but not for large if you know they are good geojson objects. Default: FALSE

Details

Internally uses simplify-js to perform simplification.

Value

A simplified feature.

A Feature of either data-Polygon or data-LineString.

See Also

Other transformations: lawn_bezier(), lawn_buffer(), lawn_concave(), lawn_convex(), lawn_difference(), lawn_intersect(), lawn_merge(), lawn_union()

Examples

feature <- '{
  "type": "Feature",
  "properties": {},
  "geometry": {
    "type": "Polygon",
    "coordinates": [[
      [-70.603637, -33.399918],
      [-70.614624, -33.395332],
      [-70.639343, -33.392466],
      [-70.659942, -33.394759],
      [-70.683975, -33.404504],
      [-70.697021, -33.419406],
      [-70.701141, -33.434306],
      [-70.700454, -33.446339],
      [-70.694274, -33.458369],
      [-70.682601, -33.465816],
      [-70.668869, -33.472117],
      [-70.646209, -33.473835],
      [-70.624923, -33.472117],
      [-70.609817, -33.468107],
      [-70.595397, -33.458369],
      [-70.587158, -33.442901],
      [-70.587158, -33.426283],
      [-70.590591, -33.414248],
      [-70.594711, -33.406224],
      [-70.603637, -33.399918]
    ]]
  }
}'

lawn_simplify(feature, tolerance = 0.01)
## Not run: 
lawn_simplify(feature, tolerance = 0.01) %>% view

## End(Not run)

Example output

<Polygon>
  Bounding box: -70.7 -33.5 -70.6 -33.4
  No. points: 8
  Properties: NULL

lawn documentation built on Jan. 6, 2021, 5:07 p.m.