#!/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 25.18054605 57.15079128 -gcp 20484.0 0.0 25.18574953 57.23118361 -gcp 20484.0 16995.0 25.30893803 57.22985378 -gcp 0.0 16995.0 25.30664206 57.14885911 GX10802/c_GX_10802_SK_frame_397.jpg c_GX_10802_SK_frame_397.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 16992.0\n20481.0 16992.0\n20481.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_10802_SK_frame_397.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_10802_SK_frame_397.vrt c_GX_10802_SK_frame_397.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES c_GX_10802_SK_frame_397.cut.vrt c_GX_10802_SK_frame_397.xyz