#!/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 25.47955871 57.28884267 -gcp 14289.0 0.0 25.48832417 57.20694874 -gcp 14289.0 14211.0 25.3377986 57.20035881 -gcp 0.0 14211.0 25.32527804 57.28342113 GX10508/GX_10508_SK_frame_312.jpg GX_10508_SK_frame_312.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "624.0 1260.0\n13968.0 1056.0\n13788.0 12828.0\n600.0 12588.0" | \
  gdaltransform -tps -output_xy GX_10508_SK_frame_312.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10508_SK_frame_312.vrt GX_10508_SK_frame_312.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10508_SK_frame_312.cut.vrt GX_10508_SK_frame_312.xyz