#!/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 22.43938601 57.80373257 -gcp 10980.0 0.0 22.65823453 57.77138563 -gcp 10980.0 11154.0 22.58701956 57.66137751 -gcp 0.0 11154.0 22.39655954 57.69159456 GX13126/GX_13126_SG_frame_80.jpg GX_13126_SG_frame_80.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1152.0 1203.0\n10584.0 1271.7325905292473\n10584.0 9815.772701949862\n1128.0 10031.919777158775" | \
  gdaltransform -tps -output_xy GX_13126_SG_frame_80.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SG_frame_80.vrt GX_13126_SG_frame_80.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SG_frame_80.cut.vrt GX_13126_SG_frame_80.xyz