#!/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 24.92435217 56.96643308 -gcp 21414.0 0.0 24.92360115 57.06448985 -gcp 21414.0 21666.0 25.09552002 57.06236693 -gcp 0.0 21666.0 25.10045528 56.97203559 GX2206/GX_2206_SK_frame_38.jpg GX_2206_SK_frame_38.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 2952.0\n864.0 19536.0\n21120.0 19536.0\n21120.0 2952.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_38.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_38.vrt GX_2206_SK_frame_38.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_38.cut.vrt GX_2206_SK_frame_38.xyz