#!/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 25.57607015 57.18290714 -gcp 43200.0 0.0 25.57753134 57.09819576 -gcp 43200.0 46188.0 25.41509216 57.09484592 -gcp 0.0 46188.0 25.40611053 57.18155913 GX10514/GX_10514_SK_frame_442.jpg GX_10514_SK_frame_442.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1488.0 5664.0\n1776.0 39648.0\n41184.0 39024.0\n40368.0 4272.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_442.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_442.vrt GX_10514_SK_frame_442.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_442.cut.vrt GX_10514_SK_frame_442.xyz