#!/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 3.0 3.0 24.14656667 56.90611667 -gcp 21600.0 0.0 24.09646667 56.90196667 -gcp 21600.0 21729.0 24.08765 56.92976667 -gcp 0.0 21729.0 24.14003333 56.93463333 GX2200/GX_2200_SD_frame_74.jpg GX_2200_SD_frame_74.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "960.0 3120.1600889382994\n1104.0 19608.266814897164\n20904.0 19776.02668148972\n21048.0 2759.746525847693" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_74.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_74.vrt GX_2200_SD_frame_74.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_74.cut.vrt GX_2200_SD_frame_74.xyz