#!/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 22.164863399548654 57.29804614359881 -gcp 17364.0 0.0 23.762859037834176 57.176738416969236 -gcp 17364.0 15591.0 23.54965520818139 56.40521991510767 -gcp 0.0 15591.0 21.987818485899428 56.52301599097528 Viduseuropas_specialas_topografiskas_kartes_Tukums__6828_A1_L43_12_02.JPG Viduseuropas_specialas_topografiskas_kartes_Tukums__6828_A1_L43_12_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((894 963, 886 3737, 4906 3759, 4920 979, 894 963))" Viduseuropas_specialas_topografiskas_kartes_Tukums__6828_A1_L43_12_02.vrt Viduseuropas_specialas_topografiskas_kartes_Tukums__6828_A1_L43_12_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_Tukums__6828_A1_L43_12_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Tukums__6828_A1_L43_12_02.xyz