#!/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 26.871897639413607 57.397429060802665 -gcp 11883.0 0.0 26.86434423697127 57.36871832139834 -gcp 11883.0 11892.0 26.810968429051034 57.37189911057657 -gcp 0.0 11892.0 26.817802999477287 57.401402213222454 Aluksne-1989-1186/Aluksne-1989-1186-101.jpg Aluksne-1989-1186-101.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1212.0 2376.0\n9516.0 1128.0\n10764.0 9492.0\n2454.0 10746.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-101.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-101.vrt Aluksne-1989-1186-101.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-101.cut.vrt Aluksne-1989-1186-101.xyz