#!/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 26.957530975341793 57.39819632303761 -gcp 10530.0 0.0 26.956570820234987 57.372737336419455 -gcp 10530.0 10554.0 26.90801259803772 57.372512428265146 -gcp 0.0 10554.0 26.908854246139537 57.39923686020202 Aluksne-1989-1186/Aluksne-1989-1186-61.jpg Aluksne-1989-1186-61.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1017.0 1026.0\n9471.0 967.125\n9489.375 9382.5\n1033.125 9430.125" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-61.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-61.vrt Aluksne-1989-1186-61.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-61.cut.vrt Aluksne-1989-1186-61.xyz