#!/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 26.23218458 57.03800213 -gcp 21600.0 0.0 26.23497408 57.12197375 -gcp 21600.0 23091.0 26.40003194 57.12285222 -gcp 0.0 23091.0 26.40109252 57.03600539 GX10525/GX_10525_SK_frame_502.jpg GX_10525_SK_frame_502.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1440.0 3192.0\n1368.0 20328.0\n21144.0 20424.0\n20976.0 2976.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_502.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_502.vrt GX_10525_SK_frame_502.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_502.cut.vrt GX_10525_SK_frame_502.xyz