#!/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 24.7661104 57.04198528 -gcp 21414.0 0.0 24.77633459 57.1396606 -gcp 21414.0 21789.0 24.94932184 57.13329101 -gcp 0.0 21789.0 24.9466064 57.04165582 GX2206/GX_2206_SK_frame_88.jpg GX_2206_SK_frame_88.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "648.0 3096.0\n744.0 19416.0\n21120.0 19872.0\n21024.0 3072.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_88.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_88.vrt GX_2206_SK_frame_88.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_88.cut.vrt GX_2206_SK_frame_88.xyz