#!/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 24.5840186 56.79732876 -gcp 15582.0 0.0 24.59261316 56.71319512 -gcp 15582.0 15582.0 24.44131876 56.70827834 -gcp 0.0 15582.0 24.42890097 56.79092717 GX10863/GX_10863_SK_frame_879.jpg GX_10863_SK_frame_879.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1152.0 1224.0\n1128.0 13200.0\n14664.0 13152.0\n14640.0 1176.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_879.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_879.vrt GX_10863_SK_frame_879.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_879.cut.vrt GX_10863_SK_frame_879.xyz