#!/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 399.0 525.0 23.25 56.333333333333336 -gcp 8526.0 552.0 23.5 56.333333333333336 -gcp 8517.0 10242.0 23.5 56.166666666666664 -gcp 351.0 10224.0 23.25 56.166666666666664 mapster/RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.jpg RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "399.0 525.0\n8526.0 552.0\n8517.0 10242.0\n351.0 10224.0" | \
  gdaltransform -tps -output_xy RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.vrt RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.cut.vrt RKKA050_O-34-143-B_Skaistgiris_ca1931_greif.xyz