#!/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 360.0 903.0 20.966666666666665 57 -gcp 13905.0 867.0 21.75 57 -gcp 13986.0 16728.0 21.75 56.5 -gcp 288.0 16740.0 20.966666666666665 56.5 mapster/Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.jpg Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "360.0 903.0\n13905.0 867.0\n13986.0 16728.0\n288.0 16740.0" | \
  gdaltransform -tps -output_xy Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.vrt Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.cut.vrt Estland-Lettland_100k_41_NW_Liepaja_1_100K_1940.xyz