#!/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 22.461794 57.75087797 -gcp 10956.0 0.0 22.48886603 57.71758863 -gcp 10956.0 10800.0 22.42653066 57.7031044 -gcp 0.0 10800.0 22.39973758 57.73620462 GX18588/GX_18588_SK_frame_087.jpg GX_18588_SK_frame_087.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0 1395.0\n10224.0 983.9866295264624\n10152.0 9311.95988857939\n792.0 9192.093593314763" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_087.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_087.vrt GX_18588_SK_frame_087.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_087.cut.vrt GX_18588_SK_frame_087.xyz