tiler

Author: Matthew Leonawicz
License: MIT

Create geographic and non-geographic map tiles

The tiler package provides a tile generator function for creating map tile sets for use with packages such as leaflet. In addition to generating map tiles based on a common raster layer source, it also handles the non-geographic edge case, producing map tiles from arbitrary images. These map tiles, which have a a non-geographic simple coordinate reference system, can also be used with leaflet when applying the simple CRS option.

Map tiles can be created from an input file with any of the following extensions: tif, grd and nc for spatial maps and png, jpg and bmp for basic images.

Installation

Install tiler from CRAN with:

install.packages("tiler")

Install the development version from GitHub with:

# install.packages("devtools")
devtools::install_github("leonawicz/tiler")

For non-geographic tiles, using a png file is recommended for quality and file size. jpg may yield a lower quality result, while a large, high resolution bmp file may have an enormous file size compared to png.

jpg and bmp are optionally supported by tiler. This means they are not installed and imported with tiler. It is assumed the user will provide png images. If using jpg or bmp and the packages jpeg or bmp are not installed, respectively, tile will print a message to the console notfying of the required package installations.

System requirements

This package requires Python and the gdal library for Python. Windows users are recommended to install OSGeo4W as an easy way to obtain the required gdal support for Python in Windows.

Examples

See the introduction vignette for more details and examples.

Reference

Complete package reference and function documentation