#!/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 26.89864240275468 57.38674280768514 -gcp 10500.0 0.0 26.89836844765717 57.36122408657274 -gcp 10500.0 10566.0 26.851224303245544 57.361326049711835 -gcp 0.0 10566.0 26.850500921071443 57.386648396215065 Aluksne-1989-1186/Aluksne-1989-1186-94.jpg Aluksne-1989-1186-94.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1029.0 981.0\n9540.0 1065.0\n9417.0 9480.0\n936.0 9405.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-94.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-94.vrt Aluksne-1989-1186-94.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-94.cut.vrt Aluksne-1989-1186-94.xyz