#!/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 24.21221344 56.79563567 -gcp 15582.0 0.0 24.22612554 56.71286013 -gcp 15582.0 15582.0 24.07720548 56.70408082 -gcp 0.0 15582.0 24.05718076 56.78571391 GX10863/GX_10863_SK_frame_870.jpg GX_10863_SK_frame_870.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1296.0 1320.0\n1152.0 13560.0\n14616.0 13632.0\n14616.0 1080.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_870.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_870.vrt GX_10863_SK_frame_870.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_870.cut.vrt GX_10863_SK_frame_870.xyz