#!/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 25.38854351 57.04388289 -gcp 43200.0 0.0 25.3925687 57.12859798 -gcp 43200.0 46686.0 25.56056024 57.12660044 -gcp 0.0 46686.0 25.55724214 57.0405672 GX10525/GX_10525_SK_frame_516.jpg GX_10525_SK_frame_516.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "40608.0 5616.0\n2064.0 6528.0\n2928.0 40608.0\n40848.0 40512.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_516.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_516.vrt GX_10525_SK_frame_516.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_516.cut.vrt GX_10525_SK_frame_516.xyz