#!/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 25.17542839 57.25769496 -gcp 43251.0 0.0 25.1844852 57.34485422 -gcp 43251.0 43533.0 25.34417287 57.34010686 -gcp 0.0 43533.0 25.33906527 57.25555891 GX8464/GX_8464_SK_frame_278_copy.jpg GX_8464_SK_frame_278_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1104.0 3647.8879159369535\n42000.0 2927.9719789842384\n42144.0 23903.327495621714\n1200.0 24096.19614711033" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_278_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_278_copy.vrt GX_8464_SK_frame_278_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_278_copy.cut.vrt GX_8464_SK_frame_278_copy.xyz