#!/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 21.371498680353408 56.51316833529285 -gcp 10542.0 0.0 21.37163791911217 56.486395906800496 -gcp 10542.0 12417.0 21.31468470072897 56.48593203054818 -gcp 0.0 12417.0 21.3143630717572 56.51292954582393 Aizpute-1988-991/Aizpute-1988-991-9.jpg Aizpute-1988-991-9.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "189.0 1302.0\n10065.0 1158.0\n10212.0 11082.0\n336.0 11223.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-9.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-9.vrt Aizpute-1988-991-9.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-9.cut.vrt Aizpute-1988-991-9.xyz