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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,79 +1,95 @@ | ||
| #' @importFrom terra rast | ||
| make_raster <- function(loc_data) { | ||
| files <- loc_data$files | ||
| tile_grid <- loc_data$tiles | ||
| user_extent <- loc_data$extent | ||
| files <- normalizePath(files) | ||
| if (find_format(files[1]) == "tif") { | ||
| out <- terra::merge(terra::sprc(lapply(files, terra::rast))) | ||
| #terra::crs(out) <- "EPSG:3857" | ||
| out <- raster::raster(out) | ||
| raster::projection(out) <- "+proj=merc +a=6378137 +b=6378137" | ||
| ## short circuit, the old way is not working | ||
| return(out) | ||
| } | ||
| br <- lapply(files, raster_brick) | ||
| # is_jpeg <- function(x) { | ||
| # if (!file.exists(x[1])) return(FALSE) | ||
| # if (file.info(x[1])$size <= 11L) return(FALSE) | ||
| # rawb <- readBin(x[1], "raw", n = 11L) | ||
| # all(rawb[1:2] == as.raw(c(0xff, 0xd8))) && rawToChar(rawb[7:11]) == "JFIF" | ||
| # } | ||
| # | ||
| # is_png <- function(x) { | ||
| # #"89 50 4e 47 0d 0a 1a 0a" | ||
| # if (!file.exists(x[1])) return(FALSE) | ||
| # if (file.info(x[1])$size <= 8L) return(FALSE) | ||
| # rawb <- readBin(x[1], "raw", n = 8L) | ||
| # all(rawb == as.raw(c(0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a))) | ||
| # } | ||
|
|
||
| for (i in seq_along(br)) { | ||
| br[[i]] <- raster::setExtent(br[[i]], | ||
| mercator_tile_extent(tile_grid$tiles$x[i], tile_grid$tiles$y[i], zoom = tile_grid$zoom)) | ||
| } | ||
|
|
||
| out <- fast_merge(br) | ||
| raster::crs(out) <- sp::CRS(.merc(), doCheckCRSArgs = FALSE) | ||
| if (!is.null(user_extent)) out <- raster::crop(out, user_extent , snap = "out") | ||
| out | ||
| } | ||
|
|
||
| raster_brick <- function(x) { | ||
| out <- NULL | ||
| if (find_format(x) == "tif") { | ||
| #out <- raster::brick(terra::rast(x)) | ||
| #return(raster::setExtent(out, raster::extent(0, nrow(out), 0, ncol(out)))) | ||
| return(terra::rast(out)) | ||
| } | ||
| if (find_format(x)== "jpg") { | ||
| out <- jpeg::readJPEG(x) | ||
| } | ||
| if (find_format(x) == "png") { | ||
| out <- png::readPNG(x) | ||
| } | ||
|
|
||
| if (is.null(out)) stop(sprintf("cannot read %s", x)) | ||
| out <- out*255 | ||
| mode(out) <- "integer" | ||
| ## in case it's greyscale ... | ||
| if (length(dim(out)) == 2L) out <- array(out, c(dim(out), 1L)) | ||
| # raster::setExtent(raster::brick(out), raster::extent(0, nrow(out), 0, ncol(out))) | ||
| raster::brick(out) | ||
| } | ||
|
|
||
| raster_readAll <- function(x) { | ||
| if (!raster::hasValues(x)) x <- raster::readAll(x) | ||
| x | ||
| } | ||
|
|
||
| find_format <- function(x) { | ||
| fmt <- NULL | ||
| if (grepl("tif$", x)) return("tif") | ||
| ## jpg or png | ||
| if (is_jpeg(x)) fmt <- "jpg" | ||
| if (is_png(x)) fmt <- "png" | ||
| if (is.null(fmt)) stop(sprintf("unknown format", x)) | ||
| fmt | ||
| } | ||
|
|
||
|
|
||
| #' @importFrom raster cellsFromExtent | ||
| fast_merge <- function(x) { | ||
|
|
||
| ## about 3 times faster than reduce(, merge | ||
| crs <- raster::projection(x[[1]]) | ||
|
|
||
| out <- raster::raster(purrr::reduce(lapply(x, raster::extent), raster::union), crs = crs) | ||
| raster::res(out) <- raster::res(x[[1]]) | ||
| # cells <- unlist(purrr::map(x, ~raster::cellsFromExtent(out, .x))) | ||
| cells <- unlist(lapply(x, function(.x) cellsFromExtent(out, .x)), use.names = FALSE) | ||
| vals <- do.call(rbind, lapply(x, function(.x) raster::values(raster_readAll(.x)))) | ||
| raster::setValues(raster::brick(out, out, out), vals[order(cells), ]) | ||
| } | ||
| #' #' @importFrom terra rast | ||
| #' make_raster <- function(loc_data) { | ||
| #' files <- loc_data$files | ||
| #' tile_grid <- loc_data$tiles | ||
| #' user_extent <- loc_data$extent | ||
| #' files <- normalizePath(files) | ||
| #' if (find_format(files[1]) == "tif") { | ||
| #' out <- terra::merge(terra::sprc(lapply(files, terra::rast))) | ||
| #' #terra::crs(out) <- "EPSG:3857" | ||
| #' out <- raster::raster(out) | ||
| #' raster::projection(out) <- "+proj=merc +a=6378137 +b=6378137" | ||
| #' ## short circuit, the old way is not working | ||
| #' return(out) | ||
| #' } | ||
| #' br <- lapply(files, raster_brick) | ||
| #' | ||
| #' for (i in seq_along(br)) { | ||
| #' br[[i]] <- raster::setExtent(br[[i]], | ||
| #' mercator_tile_extent(tile_grid$tiles$x[i], tile_grid$tiles$y[i], zoom = tile_grid$zoom)) | ||
| #' } | ||
| #' | ||
| #' out <- fast_merge(br) | ||
| #' raster::crs(out) <- sp::CRS(.merc(), doCheckCRSArgs = FALSE) | ||
| #' if (!is.null(user_extent)) out <- raster::crop(out, user_extent , snap = "out") | ||
| #' out | ||
| #' } | ||
| #' | ||
| #' raster_brick <- function(x) { | ||
| #' out <- NULL | ||
| #' if (find_format(x) == "tif") { | ||
| #' #out <- raster::brick(terra::rast(x)) | ||
| #' #return(raster::setExtent(out, raster::extent(0, nrow(out), 0, ncol(out)))) | ||
| #' return(terra::rast(out)) | ||
| #' } | ||
| #' if (find_format(x)== "jpg") { | ||
| #' out <- jpeg::readJPEG(x) | ||
| #' } | ||
| #' if (find_format(x) == "png") { | ||
| #' out <- png::readPNG(x) | ||
| #' } | ||
| #' | ||
| #' if (is.null(out)) stop(sprintf("cannot read %s", x)) | ||
| #' out <- out*255 | ||
| #' mode(out) <- "integer" | ||
| #' ## in case it's greyscale ... | ||
| #' if (length(dim(out)) == 2L) out <- array(out, c(dim(out), 1L)) | ||
| #' # raster::setExtent(raster::brick(out), raster::extent(0, nrow(out), 0, ncol(out))) | ||
| #' raster::brick(out) | ||
| #' } | ||
| #' | ||
| #' raster_readAll <- function(x) { | ||
| #' if (!raster::hasValues(x)) x <- raster::readAll(x) | ||
| #' x | ||
| #' } | ||
| #' | ||
| #' find_format <- function(x) { | ||
| #' fmt <- NULL | ||
| #' if (grepl("tif$", x)) return("tif") | ||
| #' ## jpg or png | ||
| #' if (is_jpeg(x)) fmt <- "jpg" | ||
| #' if (is_png(x)) fmt <- "png" | ||
| #' if (is.null(fmt)) stop(sprintf("unknown format", x)) | ||
| #' fmt | ||
| #' } | ||
| #' | ||
| #' | ||
| #' #' @importFrom raster cellsFromExtent | ||
| #' fast_merge <- function(x) { | ||
| #' | ||
| #' ## about 3 times faster than reduce(, merge | ||
| #' crs <- raster::projection(x[[1]]) | ||
| #' | ||
| #' out <- raster::raster(purrr::reduce(lapply(x, raster::extent), raster::union), crs = crs) | ||
| #' raster::res(out) <- raster::res(x[[1]]) | ||
| #' # cells <- unlist(purrr::map(x, ~raster::cellsFromExtent(out, .x))) | ||
| #' cells <- unlist(lapply(x, function(.x) cellsFromExtent(out, .x)), use.names = FALSE) | ||
| #' vals <- do.call(rbind, lapply(x, function(.x) raster::values(raster_readAll(.x)))) | ||
| #' raster::setValues(raster::brick(out, out, out), vals[order(cells), ]) | ||
| #' } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,14 +1,14 @@ | ||
| .merc <- function() { | ||
| # if (PROJ::ok_proj6()) { | ||
| # return("EPSG:3857") | ||
| # } | ||
|
|
||
| # [1] "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs" | ||
| ## testepsg | ||
| ## "PROJ.4 rendering of [+proj=merc +a=6378137] = | ||
| ##+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +R=6378137 +units=m +no_defs | ||
|
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|
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| "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +R=6378137 +units=m +no_defs" | ||
| } | ||
| .ll <- function() "+proj=longlat +datum=WGS84 +no_defs" | ||
| .merc <- function() { | ||
| # if (PROJ::ok_proj6()) { | ||
| # return("EPSG:3857") | ||
| # } | ||
|
|
||
| # [1] "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs" | ||
| ## testepsg | ||
| ## "PROJ.4 rendering of [+proj=merc +a=6378137] = | ||
| ##+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +R=6378137 +units=m +no_defs | ||
|
|
||
|
|
||
| "+proj=merc +R=6378137" | ||
| } | ||
| .ll <- function() "+proj=longlat +datum=WGS84" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| .onLoad <- function(libname, pkgname) { | ||
| cache <- ceramic_cache() | ||
| invisible(NULL) | ||
| } |
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