#!/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 24.25874911 56.53915619 -gcp 22935.0 0.0 24.28160906 56.62941959 -gcp 22935.0 20997.0 24.43348646 56.62232589 -gcp 0.0 20997.0 24.41760778 56.52776745 GX10518/GX_10518B_SK_frame_920.jpg GX_10518B_SK_frame_920.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1788.0 1704.0\n1608.0 18504.0\n21744.0 18384.0\n22032.0 1464.0" | \
  gdaltransform -tps -output_xy GX_10518B_SK_frame_920.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10518B_SK_frame_920.vrt GX_10518B_SK_frame_920.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10518B_SK_frame_920.cut.vrt GX_10518B_SK_frame_920.xyz