Creates geographic map tiles from geospatial map files or non-geographic map tiles from simple image files. This 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 non-geographic, simple coordinate reference system (CRS), 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. This package requires 'Python' and the 'gdal' library for 'Python'. 'Windows' users are recommended to install 'OSGeo4W' (< https://trac.osgeo.org/osgeo4w/>) as an easy way to obtain the required 'gdal' support for 'Python'.
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:
nc for spatial maps and
bmp for basic images.
This package helps R users who wish to create geographic and non-geographic map tiles easily and seamlessly with only a single line of R code. The intent is to do this with a package that has
tiler from CRAN with:
Install the development version from GitHub with:
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
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
bmp and the packages
bmp are not installed, respectively,
tile will print a message to the console notifying of the required package installations.
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. See
?tiler_options or the package vignette for more information.
See the introduction vignette for more details and examples.
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.
OSGeo4W.batpath to system path.
leafletexamples of remotely hosted tiles generated by
OSGeo4W.batbeing ignored on Windows.
gdal2tiles*scripts have been updated to accept a command line argument when called by R that provides a path for any temporary files, i.e.,
tmp.*.vrtfiles created by the
gdal2tiles*scripts. These were previously accumulating in the system temp folder. The new temporary directory is a sub-directory inside
tempdir(). Therefore, it is cleaned up when exiting R. Nevertheless,
tilealso force deletes this subdirectory immediately after its internal system call to one of the
gdal2tiles*scripts returns, so the temporary sub-directory does not even exist for the full duration of the
view_tilesand other supporting functions for generating HTML Leaflet tile preview web page.
tilenow generates previewer by default.
tile, added arguments including
format, changed some argument names.
tilefunction for generating map tiles from geographic or non-geographic maps/images.