#!/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 24.19524193 56.54440296 -gcp 22935.0 0.0 24.21570961 56.63506916 -gcp 22935.0 20997.0 24.36943854 56.62611349 -gcp 0.0 20997.0 24.34969425 56.53355993 GX10518/GX_10518B_SK_frame_921.jpg GX_10518B_SK_frame_921.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1980.0 1680.0\n1632.0 18576.0\n21672.0 18696.0\n22008.0 1512.0" | \
  gdaltransform -tps -output_xy GX_10518B_SK_frame_921.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10518B_SK_frame_921.vrt GX_10518B_SK_frame_921.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10518B_SK_frame_921.cut.vrt GX_10518B_SK_frame_921.xyz