#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 24.024518379524547 57.011680311994866 -gcp 21600.0 0.0 23.999199906157997 57.011511820623106 -gcp 21600.0 21915.0 23.99871786522278 57.02547667416687 -gcp 0.0 21915.0 24.023917294977462 57.025692596307145 GX4799/GX_4799_SD_frame_134.jpg GX_4799_SD_frame_134.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1032.0 2736.0\n1008.0 19584.0\n21312.0 19872.0\n21312.0 2712.0" | \
  gdaltransform -tps -output_xy GX_4799_SD_frame_134.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4799_SD_frame_134.vrt GX_4799_SD_frame_134.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4799_SD_frame_134.cut.vrt GX_4799_SD_frame_134.xyz