#!/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 26.06523514 57.40157788 -gcp 10428.0 0.0 26.07484818 57.31386939 -gcp 10428.0 10560.0 25.91485977 57.30872398 -gcp 0.0 10560.0 25.90322971 57.39570479 GX8473/GX_8473_SK_frame_214.jpg GX_8473_SK_frame_214.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "672.0 1155.0\n9960.0 887.732590529248\n10032.0 9228.006685236767\n1008.0 9276.100278551532" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_214.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_214.vrt GX_8473_SK_frame_214.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_214.cut.vrt GX_8473_SK_frame_214.xyz