#!/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 26.64747777652741 57.42435272510663 -gcp 10674.0 0.0 26.646415621757512 57.39770215299693 -gcp 10674.0 10749.0 26.59694608974457 57.3981385490734 -gcp 0.0 10749.0 26.597766845703124 57.42494776902585 Aluksne-1989-1186/Aluksne-1989-1186-9.jpg Aluksne-1989-1186-9.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1032.0 1185.0\n9435.0 1026.0\n9555.0 9501.0\n1146.0 9633.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-9.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-9.vrt Aluksne-1989-1186-9.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-9.cut.vrt Aluksne-1989-1186-9.xyz