The goal of filearchy is to generate pyramid tiled image directories. Like gdal2tiles.py.
(somehow) detect the case when warp is not needed (3857->3857 or 4326->4326) and use RasterIO (translate) instead, it should be a bit faster - but how to encode that in the scheme vs. the run?
driver and file extension options, we have png and jpeg
make it clear that byte-scaling is not mandatory, perfectly valid to have tiles of data like tiles-prod and see sds::wms_amazon_elevation()
add palette-handling example (or point to one, probably a gdalraster vignette on byte-scaling and attach palette and expand)
VRT creation for tiles (at zoom), or conversion to GTI etc
add resampling option
discuss parallel write, how to enable
exclude transparent tiles (not sure how, do we detect zero-png/jpg?)
DONE add arbitrary zoom levels not just a max
DONE ‘update’ arg - resume (don’t rewrite non-missing)
DONE profile mercator/geodetic/raster
DONE - see grout::tile_spec() we have dry_run in gdal_tiles() but
I think it should be a separate function to render from the scheme
DONE implement xyz vs tms mode
DONE generate leaflet.html index
You can install the development version of filearchy from GitHub with:
# install.packages("devtools")
# devtools::install_github("hypertidy/filearchy")
install.packages("filearchy", repos = c('https://hypertidy.r-universe.dev', 'https://cloud.r-project.org'))
‘gebco_ovr5.vrt’ is a pre-prepared version of GEBCO 2023 elevation COG that has been Byte-scaled and reduced to a manageable subset.
Here we use that as input, it will read data from the internet (a COG of GEBCO), and write tiles from zoom level 0 to zoom level 3, detected as the scope of resolution that includes the highest level of detail available.
We can specify zoom to only generate one or more levels, and the
output_dir param can be used to specify where the tiles are written.
By default we also get an html index.
library(filearchy)
#options(parallelly.fork.enable = TRUE, future.rng.onMisuse = "ignore")
#library(furrr); plan(multicore)
dsn <- system.file("extdata/gebco_ovr5.vrt", package = "filearchy", mustWork = TRUE)
tiles <- gdal_tiles(dsn, dry_run = FALSE)
#> [1] "tiles in directory: /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a"
#plan(sequential)
fs::dir_ls(dirname(dirname(dirname(tiles$path[1]))), recurse = TRUE, type = "f")
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/0/0/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/1/0/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/1/0/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/1/1/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/1/1/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/0/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/0/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/0/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/0/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/1/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/1/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/1/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/1/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/2/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/2/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/2/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/2/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/3/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/3/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/3/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/2/3/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/0/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/1/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/2/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/3/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/4/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/5/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/6/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/0.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/1.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/2.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/3.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/4.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/5.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/6.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/3/7/7.png
#> /perm_storage/home/data/r_tmp/RtmpwtGuRD/file822756cdb250a/leaflet.html
Now open the html index ** “leaflet.html” ** from that directory.
Or, just do a dry_run:
(scheme <- gdal_tiles(dsn, zoom = 0:5))
#> # A tibble: 1,365 × 11
#> tile tile_col tile_row zoom xmin xmax ymin ymax ncol
#> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 0 0 0 0 -20037508. 20037508. -2.0038e7 2.0038e7 256
#> 2 2 0 0 1 -20037508. 0 -2.0038e7 0 256
#> 3 3 1 0 1 0 20037508. -2.0038e7 0 256
#> 4 0 0 1 1 -20037508. 0 0 2.0038e7 256
#> 5 1 1 1 1 0 20037508. 0 2.0038e7 256
#> 6 12 0 0 2 -20037508. -10018754. -2.0038e7 -1.0019e7 256
#> 7 13 1 0 2 -10018754. 0 -2.0038e7 -1.0019e7 256
#> 8 14 2 0 2 0 10018754. -2.0038e7 -1.0019e7 256
#> 9 15 3 0 2 10018754. 20037508. -2.0038e7 -1.0019e7 256
#> 10 8 0 1 2 -20037508. -10018754. -1.0019e7 0 256
#> # ℹ 1,355 more rows
#> # ℹ 2 more variables: nrow <dbl>, crs <chr>
ex <- c(min(scheme$xmin), max(scheme$xmax), min(scheme$ymin), max(scheme$ymax))
plot(ex[1:2], ex[3:4], asp = 1)
md <- dplyr::filter(scheme, zoom == round(mean(unique(zoom)) ))
with(md, rect(xmin, ymin, xmax, ymax, border = "red", lwd = 3))
mx <- dplyr::filter(scheme, zoom == max(zoom) )
with(mx, rect(xmin, ymin, xmax, ymax))
Please note that the filearchy project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.