#!/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 26.29088787 57.03819664 -gcp 21600.0 0.0 26.29527075 57.12273016 -gcp 21600.0 23091.0 26.45935132 57.12220951 -gcp 0.0 23091.0 26.46031819 57.03623797 GX10525/GX_10525_SK_frame_501.jpg GX_10525_SK_frame_501.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1344.0 2952.0\n1128.0 20040.0\n20928.0 20352.0\n21000.0 2808.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_501.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_501.vrt GX_10525_SK_frame_501.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_501.cut.vrt GX_10525_SK_frame_501.xyz