#!/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 21.453552246094 56.53497377131 -gcp 10500.0 0.0 21.454721689224 56.50794494146 -gcp 10500.0 12276.0 21.398019790649 56.507210804655 -gcp 0.0 12276.0 21.397075653076 56.534009421816 Aizpute-1988-991/Aizpute-1988-991-23.jpg Aizpute-1988-991-23.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 969.0\n100.5 10881.0\n9975.0 10629.0\n9723.0 717.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-23.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-23.vrt Aizpute-1988-991-23.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-23.cut.vrt Aizpute-1988-991-23.xyz