#!/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 24.81133461 57.14407481 -gcp 22809.0 0.0 24.8101759 57.23452246 -gcp 22809.0 20997.0 24.96582985 57.2363805 -gcp 0.0 20997.0 24.96685982 57.1453553 GX10802/GX_10802_SK_frame_403.jpg GX_10802_SK_frame_403.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1272.0 1512.0\n1032.0 18324.0\n21576.0 18636.0\n21960.0 1224.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_403.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_403.vrt GX_10802_SK_frame_403.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_403.cut.vrt GX_10802_SK_frame_403.xyz