#!/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 24.94458511 56.79584976 -gcp 15582.0 0.0 24.95419266 56.71243278 -gcp 15582.0 15582.0 24.80269206 56.70614309 -gcp 0.0 15582.0 24.78921568 56.78911942 GX10863/GX_10863_SK_frame_887.jpg GX_10863_SK_frame_887.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "840.0 1488.0\n816.0 13632.0\n14808.0 13728.0\n14880.0 1128.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_887.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_887.vrt GX_10863_SK_frame_887.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_887.cut.vrt GX_10863_SK_frame_887.xyz