#!/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 26.863675117493 57.461930514258 -gcp 10506.0 0.0 26.865391731262 57.436092135632 -gcp 10506.0 10656.0 26.816704273224 57.434885205797 -gcp 0.0 10656.0 26.815213750144 57.461074629412 Aluksne-1989-1186/Aluksne-1989-1186-104.jpg Aluksne-1989-1186-104.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1110.0 1047.0\n9513.0 1026.0\n9525.0 9513.0\n1122.0 9558.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-104.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-104.vrt Aluksne-1989-1186-104.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-104.cut.vrt Aluksne-1989-1186-104.xyz