#!/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 26.711961227416996 57.47254115695717 -gcp 10464.0 0.0 26.71059866523743 57.44615792269557 -gcp 10464.0 10656.0 26.661015552520755 57.446850631319016 -gcp 0.0 10656.0 26.663000387191776 57.473521943308995 Aluksne-1989-1186/Aluksne-1989-1186-164.jpg Aluksne-1989-1186-164.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1011.0\n9453.0 1026.0\n9408.0 9561.0\n981.0 9534.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-164.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-164.vrt Aluksne-1989-1186-164.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-164.cut.vrt Aluksne-1989-1186-164.xyz