#!/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 26.51386621665955 57.53241088223781 -gcp 10509.0 0.0 26.519756347656255 57.50514974310297 -gcp 10509.0 10617.0 26.46913346576691 57.50245825076697 -gcp 0.0 10617.0 26.464160650253298 57.52912747066731 Aluksne-1989-1186/Aluksne-1989-1186-222.jpg Aluksne-1989-1186-222.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1089.0 960.0\n9498.0 963.0\n9474.0 9432.0\n1062.0 9432.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-222.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-222.vrt Aluksne-1989-1186-222.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-222.cut.vrt Aluksne-1989-1186-222.xyz