#!/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 26.869057591769586 57.503274527568244 -gcp 11817.0 0.0 26.86152443975937 57.474604943217756 -gcp 11817.0 12117.0 26.806294560314868 57.47856103522027 -gcp 0.0 12117.0 26.814728934554083 57.5082021785822 Aluksne-1989-1186/Aluksne-1989-1186-108.jpg Aluksne-1989-1186-108.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1107.0 2535.0\n9393.0 1095.0\n10821.0 9492.0\n2544.0 10911.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-108.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-108.vrt Aluksne-1989-1186-108.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-108.cut.vrt Aluksne-1989-1186-108.xyz