https://github.com/be-marc/leaflet.opacity

Leaflet for R Opacity Controls
https://github.com/be-marc/leaflet.opacity

Last synced: 4 months ago
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Leaflet for R Opacity Controls

• Host: GitHub
• URL: https://github.com/be-marc/leaflet.opacity
• Owner: be-marc
• Created: 2018-11-07T09:54:27.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2023-08-15T12:51:12.000Z (over 1 year ago)
• Last Synced: 2024-10-11T18:19:07.421Z (4 months ago)
• Language: R
• Size: 1.25 MB
• Stars: 3
• Watchers: 2
• Forks: 1
• Open Issues: 3
• Metadata Files:
  • Readme: README.Rmd

Awesome Lists containing this project

• awesome-leaflet - leaflet.opacity: Leaflet for R Opacity Controls
• awesome-shiny-extensions - leaflet.opacity - Opacity controls for Leaflet maps. (Visualization / Maps and Spatial Data)

README

        
---

output: github_document

---

```{r setup, include = FALSE}

knitr::opts_chunk$set(

  collapse = TRUE,

  comment = "#>",

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

  out.width = "100%"

)

```

# leaflet.opacity

# General

**leaflet.opacity** extends the **leaflet** R package with the **Leaflet.OpacityControls** JavaScript plugin (LizardTech, 2013). It offers control buttons and a slider for adjusting the opacity of a layer.

## Installation

You can install the released version of leaflet.opacity from [CRAN](https://CRAN.R-project.org) with:

```{r, eval=FALSE}

install.packages("leaflet.opacity")

```

or the latest version from GitHub with:

```{r, eval=FALSE}

devtools::install_github("https://github.com/be-marc/leaflet.opacity", dependencies=TRUE)

```

## Example

```{r, eval=FALSE}

library(leaflet)

library(leaflet.opacity)

library(raster)

r <- raster(xmn = -2.8, xmx = -2.79, ymn = 54.04, ymx = 54.05, nrows = 30, ncols = 30)

values(r) <- matrix(1:900, nrow(r), ncol(r), byrow = TRUE)

crs(r) <- CRS("+init=epsg:4326")

leaflet() %>%

    addTiles() %>%

    addRasterImage(r, layerId = "raster") %>%

    addOpacitySlider(layerId = "raster")

```

## Reference

LizardTech (2013). Leaflet.OpacityControls. Retrieved from https://github.com/lizardtechblog/Leaflet.OpacityControls