https://github.com/program--/hilbert

R :package: for Hilbert Curve indexing of coordinates
https://github.com/program--/hilbert

hilbert-curve r spatial

Last synced: 24 days ago
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R :package: for Hilbert Curve indexing of coordinates

• Host: GitHub
• URL: https://github.com/program--/hilbert
• Owner: program--
• License: other
• Created: 2022-03-09T17:43:48.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-04-08T15:31:34.000Z (over 2 years ago)
• Last Synced: 2024-06-11T17:04:39.952Z (7 months ago)
• Topics: hilbert-curve, r, spatial
• Language: R
• Homepage: https://hilbert.justinsingh.me
• Size: 1.55 MB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.Rmd
  • License: LICENSE

Awesome Lists containing this project

README

        
---

output: github_document

---

```{r, include = FALSE}

knitr::opts_chunk$set(

  collapse = TRUE,

  comment = "#>",

  fig.path = "man/figures/README-",

  out.width = "100%"

)

```

# hilbert

[![CRAN status](https://www.r-pkg.org/badges/version/hilbert)](https://CRAN.R-project.org/package=hilbert)

[![Codecov test coverage](https://codecov.io/gh/program--/hilbert/branch/main/graph/badge.svg)](https://app.codecov.io/gh/program--/hilbert?branch=main)

[![R-CMD-check](https://github.com/program--/hilbert/workflows/R-CMD-check/badge.svg)](https://github.com/program--/hilbert/actions)

[![MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](https://opensource.org/licenses/MIT)

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

## Installation

You can install **hilbert** via either `remotes` or `pak`:

``` r

# pak

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

# remotes

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

```

## Example

### Setting Up

```{r setup}

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

```{r coords2pos}

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

pos

```

### Position to Index

```{r pos2index}

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

index

```

### Index to Position

```{r index2pos}

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

new_pos

```

### Position to Coordinates

```{r pos2coords}

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

new_xy

```