#!/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 25.22484541 57.14994455 -gcp 14331.0 0.0 25.23106813 57.23487374 -gcp 14331.0 14124.0 25.38499475 57.23153493 -gcp 0.0 14124.0 25.38030624 57.14707819 GX10802/GX_10802_SK_frame_396.jpg GX_10802_SK_frame_396.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "432.0 1443.0\n13968.0 1104.0533037201556\n14016.0 12624.01332593004\n504.0 12672.13325930039" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_396.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_396.vrt GX_10802_SK_frame_396.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_396.cut.vrt GX_10802_SK_frame_396.xyz