#!/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 26.653181043133454 57.498304910723256 -gcp 11421.0 0.0 26.648068348940292 57.46935183177324 -gcp 11421.0 11526.0 26.594550326883052 57.47195175123634 -gcp 0.0 11526.0 26.59923923205186 57.50091941604701 Aluksne-1989-1186/Aluksne-1989-1186-2.jpg Aluksne-1989-1186-2.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "981.0 1998.0\n9342.0 969.0\n10348.5 9397.5\n2001.0 10441.875" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-2.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-2.vrt Aluksne-1989-1186-2.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-2.cut.vrt Aluksne-1989-1186-2.xyz