#!/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 26.830828220367437 57.35414927376781 -gcp 11151.0 0.0 26.83656856279215 57.32664060745806 -gcp 11151.0 11544.0 26.783512172980014 57.32337639044712 -gcp 0.0 11544.0 26.77881646381638 57.35115334061493 Aluksne-1989-1186/Aluksne-1989-1186-120.jpg Aluksne-1989-1186-120.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1779.0 1011.0\n10143.0 1956.0\n9162.0 10422.0\n792.0 9468.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-120.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-120.vrt Aluksne-1989-1186-120.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-120.cut.vrt Aluksne-1989-1186-120.xyz