#!/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 3186.0 2136.0 27 57.5 -gcp 24393.0 2067.0 27.75 57.5 -gcp 24498.0 28320.0 27.75 57 -gcp 2970.0 28368.0 27 57 mapster/Estland-Lettland_100K_35_SW_Petseri_IX.1940.jpg Estland-Lettland_100K_35_SW_Petseri_IX.1940.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3186.0 2136.0\n24393.0 2067.0\n24498.0 28320.0\n2970.0 28368.0" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_35_SW_Petseri_IX.1940.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_35_SW_Petseri_IX.1940.vrt Estland-Lettland_100K_35_SW_Petseri_IX.1940.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_35_SW_Petseri_IX.1940.cut.vrt Estland-Lettland_100K_35_SW_Petseri_IX.1940.xyz