#!/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 21.062417248498647 57.37376114369441 -gcp 17364.0 0.0 22.655839262782184 57.265517894480666 -gcp 17364.0 15414.0 22.46975728485259 56.503394062703855 -gcp 0.0 15414.0 20.890199380401153 56.617419683417914 Viduseuropas_specialas_topografiskas_kartes_Kuldiga__6828_A1_L43_11_02.JPG Viduseuropas_specialas_topografiskas_kartes_Kuldiga__6828_A1_L43_11_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((892 1007, 909 3790.250138811771, 4926 3791, 4916 1006, 892 1007))" Viduseuropas_specialas_topografiskas_kartes_Kuldiga__6828_A1_L43_11_02.vrt Viduseuropas_specialas_topografiskas_kartes_Kuldiga__6828_A1_L43_11_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_Kuldiga__6828_A1_L43_11_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Kuldiga__6828_A1_L43_11_02.xyz