#!/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 22.053886373244342 56.89395058035632 -gcp 17541.0 0.0 23.65418069411281 56.76448198568036 -gcp 17541.0 15414.0 23.453830843897546 56.00873562825161 -gcp 0.0 15414.0 21.88520072423552 56.118623355724175 Viduseuropas_specialas_topografiskas_kartes_Laizeva__6828_A1_L43_16_02.JPG Viduseuropas_specialas_topografiskas_kartes_Laizeva__6828_A1_L43_16_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((904 981, 900 3774, 4918 3787, 4927 996, 904 981))" Viduseuropas_specialas_topografiskas_kartes_Laizeva__6828_A1_L43_16_02.vrt Viduseuropas_specialas_topografiskas_kartes_Laizeva__6828_A1_L43_16_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_Laizeva__6828_A1_L43_16_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Laizeva__6828_A1_L43_16_02.xyz