#!/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 26.709965265090307 57.43401143840572 -gcp 11700.0 0.0 26.71688089637365 57.40467944947312 -gcp 11700.0 11799.0 26.662597797439904 57.4010628650381 -gcp 0.0 11799.0 26.65566070848444 57.43030239028068 Aluksne-1989-1186/Aluksne-1989-1186-168.jpg Aluksne-1989-1186-168.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2421.0 960.0\n10749.0 2220.0\n9441.0 10635.0\n1128.0 9366.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-168.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-168.vrt Aluksne-1989-1186-168.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-168.cut.vrt Aluksne-1989-1186-168.xyz