#!/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 22.95194149 56.68450489 -gcp 11154.0 0.0 23.11426489 56.734017 -gcp 11154.0 10866.0 23.20370436 56.65273516 -gcp 0.0 10866.0 23.05163383 56.59570795 GX2685/GX_2685A_SK_frame_96.jpg GX_2685A_SK_frame_96.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "528.0 383.94651810584946\n10608.0 384.0\n10680.0 9648.026740947076\n600.0 9633.0" | \
  gdaltransform -tps -output_xy GX_2685A_SK_frame_96.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2685A_SK_frame_96.vrt GX_2685A_SK_frame_96.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2685A_SK_frame_96.cut.vrt GX_2685A_SK_frame_96.xyz