#!/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 27.21008244 57.25573092 -gcp 21600.0 0.0 27.21176542 57.33914687 -gcp 21600.0 23403.0 27.382198 57.33735327 -gcp 0.0 23403.0 27.37729285 57.25336972 GX8464/GX_8464_SK_frame_243.jpg GX_8464_SK_frame_243.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "527.9659574468087 2592.0\n431.91148936170157 19464.0\n20928.00680851064 19800.0\n20951.94553191489 2352.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_243.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_243.vrt GX_8464_SK_frame_243.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_243.cut.vrt GX_8464_SK_frame_243.xyz