In program--/hilbert: Coordinate Indexing on Hilbert Curves

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
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hilbert

hilbert provides utilities for quick indexing/encoding of coordinates to a Hilbert Curve.

Installation

You can install hilbert via either remotes or pak:

# pak
pak::pkg_install("program--/hilbert")

# remotes
remotes::install_github("program--/hilbert")

Example

Setting Up

x <- -77.85641
y <- 34.35935
n <- 24 # n > 15 requires `bit64`
e <- c(xmax = 180, xmin = -180, ymax = 90, ymin = -90)

Coordinates to Position

pos <- hilbert::coords_to_position(x, y, n = n, extent = e)
pos

Position to Index

index <- hilbert::index(pos, coords = c("x", "y"), n = n, attach = TRUE)
index

Index to Position

new_pos <- hilbert::position(index, idx = "h", n = n, attach = FALSE)
new_pos

Position to Coordinates

new_xy <- hilbert::position_to_coords(new_pos, coords = c("x", "y"), extent = e, n = n, attach = TRUE)
new_xy

program--/hilbert documentation built on April 14, 2022, 11:53 a.m.