#!/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 25.03140193 56.64657635 -gcp 21600.0 0.0 25.001763 56.73192685 -gcp 21600.0 21975.0 25.16851794 56.75749362 -gcp 0.0 21975.0 25.20905648 56.65940986 GX2261/GX_2261_SK_frame_134.jpg GX_2261_SK_frame_134.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2064.0 2520.0\n1944.0 19800.0\n17304.0 20088.0\n17184.0 2304.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_134.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_134.vrt GX_2261_SK_frame_134.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_134.cut.vrt GX_2261_SK_frame_134.xyz