#!/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 26.549673707008 57.533389426967 -gcp 10506.0 0.0 26.551658541679 57.506316874196 -gcp 10506.0 10614.0 26.50141653347 57.50512388721 -gcp 0.0 10614.0 26.499222486496 57.531958088755 Aluksne-1989-1186/Aluksne-1989-1186-221.jpg Aluksne-1989-1186-221.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 1011.0\n9474.0 1041.0\n9421.5 10089.0\n1020.0 10041.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-221.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-221.vrt Aluksne-1989-1186-221.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-221.cut.vrt Aluksne-1989-1186-221.xyz