#!/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 2409.0 4387.476653696498 24 57.5 -gcp 34251.0 4233.139244024458 24.75 57.5 -gcp 34621.5 43760.92412451362 24.75 57 -gcp 2436.0 43954.98276820456 24 57 mapster/Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.jpg Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2409.0 4387.476653696498\n34251.0 4233.139244024458\n34621.5 43760.92412451362\n2436.0 43954.98276820456" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.vrt Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.cut.vrt Estland-Lettland_100K_33-SW_Valmiera_(Wolmar)_IV.1941_2.xyz