#!/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 0.0 0.0 20.2655971363859 57.07885483035332 -gcp 14529.0 0.0 21.620864553415675 56.99700138482455 -gcp 14529.0 18072.0 21.4267594409649 56.1111281023879 -gcp 0.0 18072.0 20.1090400981287 56.18989187626584 Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.JPG Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((1452 1487.5041643531372, 1451 4299, 3433 4309, 3438 1501, 1452 1487.5041643531372))" Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.vrt Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Liepaja__6828_A1_L43_14_02.xyz