#!/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 24.90060925 57.16708269 -gcp 27321.0 0.0 24.94214594 57.16023536 -gcp 27321.0 22023.0 24.93327856 57.1427302 -gcp 0.0 22023.0 24.89056266 57.14834975 GX4190/c_GX_4190_SD_frame_136.jpg c_GX_4190_SD_frame_136.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 22020.0\n27318.0 22020.0\n27318.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_136.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_136.vrt c_GX_4190_SD_frame_136.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES c_GX_4190_SD_frame_136.cut.vrt c_GX_4190_SD_frame_136.xyz