#!/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 3936.0 1557.0 24.837216666666666 56.5 -gcp 25719.0 1452.0 25.337216666666666 56.5 -gcp 25959.0 21138.0 25.337216666666666 56.25 -gcp 3987.0 21249.0 24.837216666666666 56.25 nr/KdwR-LC_Q16_Gross_Salwen.jpg KdwR-LC_Q16_Gross_Salwen.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3936.0 1557.0\n25719.0 1452.0\n25959.0 21138.0\n3987.0 21249.0" | \
  gdaltransform -tps -output_xy KdwR-LC_Q16_Gross_Salwen.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_Q16_Gross_Salwen.vrt KdwR-LC_Q16_Gross_Salwen.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_Q16_Gross_Salwen.cut.vrt KdwR-LC_Q16_Gross_Salwen.xyz