Nothing
#' @title tiles_from_bbox
#' @description Helper function used to retrieve the tiles required to cover
#' a given bounding box
#' @noRd
tiles_from_bbox <- function(bbox, outproj) {
# mod_proj_str <- sf::st_crs(
# 'PROJCS["MODIS Sinusoidal",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Sinusoidal"],PARAMETER["false_easting",0.0],PARAMETER["false_northing",0.0],PARAMETER["central_meridian",0.0],
# PARAMETER["semi_major",6371007.181],PARAMETER["semi_minor",6371007.181],UNIT["m",1.0]]')
#
mod_proj_str <- sf::st_crs("+proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181 +b=6371007.181 +units=m +no_defs")
bbox_mod <- reproj_bbox(bbox,
outproj,
mod_proj_str,
enlarge = TRUE)
modis_grid <- get(load(
system.file(
"ExtData/MODIS_Tiles.RData", package = "MODIStsp")))
d_bbox_mod_tiled <- suppressWarnings(sf::st_crop(modis_grid,
xmin = bbox_mod[1],
ymin = bbox_mod[2],
xmax = bbox_mod[3],
ymax = bbox_mod[4]))
return(c(
xmintile = min(d_bbox_mod_tiled$H),
xmaxtile = max(d_bbox_mod_tiled$H),
ymintile = min(d_bbox_mod_tiled$V),
ymaxtile = max(d_bbox_mod_tiled$V)
))
}
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