#!/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 25.28735161 57.3460234 -gcp 16350.0 0.0 25.33068538 57.32065928 -gcp 16350.0 16551.0 25.28290121 57.29615432 -gcp 0.0 16551.0 25.23874998 57.32152821 GX18586/GX_18586_SK_frame_13_copy.jpg GX_18586_SK_frame_13_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1128.0 1827.0\n15528.0 1871.9064066852366\n15504.0 13823.839554317548\n912.0 13680.213927576602" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_13_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_13_copy.vrt GX_18586_SK_frame_13_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_13_copy.cut.vrt GX_18586_SK_frame_13_copy.xyz