#!/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 22.57606745 57.69467618 -gcp 10980.0 0.0 22.49562263 57.71078466 -gcp 10980.0 11265.0 22.51942992 57.7533258 -gcp 0.0 11265.0 22.60684848 57.74245326 GX13126/GX_13126_SK_frame_80.jpg GX_13126_SK_frame_80.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "576.0 1443.0\n10680.0 1200.147075208914\n10704.0 9624.013370473536\n648.0 9912.080222841225" | \
  gdaltransform -tps -output_xy GX_13126_SK_frame_80.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SK_frame_80.vrt GX_13126_SK_frame_80.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SK_frame_80.cut.vrt GX_13126_SK_frame_80.xyz