#!/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 25.27280867 57.27801335 -gcp 20376.0 0.0 25.22884727 57.29483418 -gcp 20376.0 16632.0 25.25434434 57.31510058 -gcp 0.0 16632.0 25.2988261 57.29720217 GX4190/c_GX_4190_SD_frame_72.jpg c_GX_4190_SD_frame_72.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 16629.0\n20373.0 16629.0\n20373.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_72.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_72.vrt c_GX_4190_SD_frame_72.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_72.cut.vrt c_GX_4190_SD_frame_72.xyz