#!/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 26.802259548187255 57.503682534191434 -gcp 10791.0 0.0 26.80349336433411 57.47642352615662 -gcp 10791.0 10917.0 26.754003302574162 57.47561027270821 -gcp 0.0 10917.0 26.75134791564942 57.502653529743135 Aluksne-1989-1186/Aluksne-1989-1186-135.jpg Aluksne-1989-1186-135.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1410.0 1083.0\n9816.0 1347.0\n9513.0 9858.0\n1107.0 9582.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-135.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-135.vrt Aluksne-1989-1186-135.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-135.cut.vrt Aluksne-1989-1186-135.xyz