#!/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 25.45165905 56.70234952 -gcp 15018.0 0.0 25.46769289 56.61473718 -gcp 15018.0 14169.0 25.31779144 56.60407413 -gcp 0.0 14169.0 25.29688671 56.69319713 GX10511/GX_10511_SK_frame_46.jpg GX_10511_SK_frame_46.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1188.0 1296.0\n14820.0 1116.0\n14664.0 12600.0\n1020.0 12564.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_46.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_46.vrt GX_10511_SK_frame_46.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_46.cut.vrt GX_10511_SK_frame_46.xyz