#!/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 20.968374107231522 56.963304489390346 -gcp 17364.0 0.0 22.563281616400975 56.847552338491205 -gcp 17364.0 15414.0 22.367573496341425 56.09200538117582 -gcp 0.0 15414.0 20.80565745689119 56.21192522938255 Viduseuropas_specialas_topografiskas_kartes_Durbe__6828_A1_L43_15_02.JPG Viduseuropas_specialas_topografiskas_kartes_Durbe__6828_A1_L43_15_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((902 1003, 930 3823, 4919 3791, 4898 972, 902 1003))" Viduseuropas_specialas_topografiskas_kartes_Durbe__6828_A1_L43_15_02.vrt Viduseuropas_specialas_topografiskas_kartes_Durbe__6828_A1_L43_15_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_Durbe__6828_A1_L43_15_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Durbe__6828_A1_L43_15_02.xyz