#!/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 1368.0 1176.0 27.75 58 -gcp 17055.0 807.0 28.5 58 -gcp 17712.0 20361.0 28.5 57.5 -gcp 1824.0 20742.0 27.75 57.5 mapster/Estland-Lettland_100K_35_NO_Petseri_incomplete.jpg Estland-Lettland_100K_35_NO_Petseri_incomplete.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1368.0 1176.0\n17055.0 807.0\n17712.0 20361.0\n1824.0 20742.0" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_35_NO_Petseri_incomplete.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_35_NO_Petseri_incomplete.vrt Estland-Lettland_100K_35_NO_Petseri_incomplete.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_35_NO_Petseri_incomplete.cut.vrt Estland-Lettland_100K_35_NO_Petseri_incomplete.xyz