#!/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 22.57698902 57.78378174 -gcp 10917.0 0.0 22.65055496 57.76260801 -gcp 10917.0 11148.0 22.6161445 57.72294723 -gcp 0.0 11148.0 22.53425717 57.74049484 GX13126/GX_13126_SG_frame_58.jpg GX_13126_SG_frame_58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "336.0 1343.9866295264624\n10272.0 1247.9732590529247\n10464.0 9863.277994428969\n312.0 9804.213927576602" | \
  gdaltransform -tps -output_xy GX_13126_SG_frame_58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SG_frame_58.vrt GX_13126_SG_frame_58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SG_frame_58.cut.vrt GX_13126_SG_frame_58.xyz