#!/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 25.31151055 57.34957451 -gcp 12009.0 0.0 25.31702145 57.32921892 -gcp 12009.0 12495.0 25.27813554 57.32576247 -gcp 0.0 12495.0 25.27282769 57.34659432 GX18586/GX_18586_SK_frame_38.jpg GX_18586_SK_frame_38.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1440.0 900.0\n1398.0 1734.0\n486.0 1776.0\n384.0 9444.0\n11508.0 9720.0\n11718.0 1008.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_38.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_38.vrt GX_18586_SK_frame_38.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_38.cut.vrt GX_18586_SK_frame_38.xyz