#!/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 26.74103544521332 57.389066096986944 -gcp 10557.0 0.0 26.742643117904652 57.3625469660383 -gcp 10557.0 10641.0 26.693047420501713 57.36159044391995 -gcp 0.0 10641.0 26.69084264469147 57.38805699512984 Aluksne-1989-1186/Aluksne-1989-1186-149.jpg Aluksne-1989-1186-149.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1191.0 1047.0\n9657.0 1179.0\n9531.0 9603.0\n1038.0 9471.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-149.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-149.vrt Aluksne-1989-1186-149.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-149.cut.vrt Aluksne-1989-1186-149.xyz