#!/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 26.773896217346195 57.46288265256996 -gcp 10527.0 0.0 26.771568059921268 57.43665227614554 -gcp 10527.0 10641.0 26.722269058227543 57.4378245012225 -gcp 0.0 10641.0 26.725080013275146 57.464504115886015 Aluksne-1989-1186/Aluksne-1989-1186-140.jpg Aluksne-1989-1186-140.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 1032.0\n9501.0 1047.0\n9444.0 9567.0\n1032.0 9528.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-140.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-140.vrt Aluksne-1989-1186-140.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-140.cut.vrt Aluksne-1989-1186-140.xyz