#!/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 25.77012777 56.86298083 -gcp 13782.0 0.0 25.91627557 56.86002351 -gcp 13782.0 15018.0 25.9090776 56.7731324 -gcp 0.0 15018.0 25.76254249 56.77645554 GX10673/GX_10673_SK_frame_973.jpg GX_10673_SK_frame_973.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1140.0 1452.0\n12720.0 1248.0\n12612.0 14592.0\n1308.0 14568.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_973.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_973.vrt GX_10673_SK_frame_973.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_973.cut.vrt GX_10673_SK_frame_973.xyz