#!/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 24.98690128 57.06019675 -gcp 21414.0 0.0 24.98376846 57.15789057 -gcp 21414.0 21789.0 25.15695333 57.15637772 -gcp 0.0 21789.0 25.16306877 57.06710346 GX2206/GX_2206_SK_frame_84.jpg GX_2206_SK_frame_84.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "768.0 3216.0\n672.0 19416.0\n21216.0 19752.0\n21096.0 3120.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_84.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_84.vrt GX_2206_SK_frame_84.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_84.cut.vrt GX_2206_SK_frame_84.xyz