#!/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 26.864280731201 57.451597973636 -gcp 10506.0 0.0 26.864838630676 57.425930821023 -gcp 10506.0 10620.0 26.818008392334 57.424827623009 -gcp 0.0 10620.0 26.815304725647 57.450795557461 Aluksne-1989-1186/Aluksne-1989-1186-103.jpg Aluksne-1989-1186-103.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1128.0 960.0\n9534.0 1008.0\n9468.0 9525.0\n1059.0 9468.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-103.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-103.vrt Aluksne-1989-1186-103.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-103.cut.vrt Aluksne-1989-1186-103.xyz