#!/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 2673.0 4399.602556976098 24 57.5 -gcp 34527.0 4383.692051139522 24.75 57.5 -gcp 34725.0 43926.28515842135 24.75 57 -gcp 2526.0 43983.782101167315 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 "2673.0 4399.602556976098\n34527.0 4383.692051139522\n34725.0 43926.28515842135\n2526.0 43983.782101167315" | \
  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