#!/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 25.12684822 57.29622784 -gcp 15105.0 0.0 25.1342082 57.20751253 -gcp 15105.0 14211.0 24.98260975 57.20257309 -gcp 0.0 14211.0 24.97037888 57.29066303 GX10508/GX_10508_SK_frame_306.jpg GX_10508_SK_frame_306.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1512.0 1248.0\n14940.0 648.0\n14772.0 12696.0\n1428.0 12528.0" | \
  gdaltransform -tps -output_xy GX_10508_SK_frame_306.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10508_SK_frame_306.vrt GX_10508_SK_frame_306.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10508_SK_frame_306.cut.vrt GX_10508_SK_frame_306.xyz