#!/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 24.26226322 56.97338479 -gcp 21600.0 0.0 24.23038885 56.99907606 -gcp 21600.0 21168.0 24.27681484 57.01729407 -gcp 0.0 21168.0 24.31035043 56.99079232 GX4190/GX_4190_SD_frame_10.jpg GX_4190_SD_frame_10.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "672.0 2375.7198443579764\n624.0 18792.093385214008\n21096.0 18743.506392440246\n21000.0 2135.8532518065595" | \
  gdaltransform -tps -output_xy GX_4190_SD_frame_10.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4190_SD_frame_10.vrt GX_4190_SD_frame_10.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4190_SD_frame_10.cut.vrt GX_4190_SD_frame_10.xyz