#!/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 26.837346553802494 57.543528040917955 -gcp 10602.0 0.0 26.83770060539246 57.51712507696758 -gcp 10602.0 10716.0 26.78776860237122 57.51717693398234 -gcp 0.0 10716.0 26.788637638092045 57.543867745018275 Aluksne-1989-1185/Aluksne-1989-1185-116.jpg Aluksne-1989-1185-116.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1098.0\n1071.0 9621.0\n9507.0 9552.0\n9462.0 1026.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-116.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-116.vrt Aluksne-1989-1185-116.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-116.cut.vrt Aluksne-1989-1185-116.xyz