#!/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 21.2088888770465 58.18478532754755 -gcp 17364.0 0.0 22.86070865050855 58.074757590659246 -gcp 17364.0 15237.0 22.659030689470484 57.32231504521066 -gcp 0.0 15237.0 21.040398505805168 57.44175630473115 Viduseuropas_specialas_topografiskas_kartes__Irbe__6828_A1_L43_1_02.JPG Viduseuropas_specialas_topografiskas_kartes__Irbe__6828_A1_L43_1_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((993 867, 1002 3678, 4986 3679, 4978 862, 993 867))" Viduseuropas_specialas_topografiskas_kartes__Irbe__6828_A1_L43_1_02.vrt Viduseuropas_specialas_topografiskas_kartes__Irbe__6828_A1_L43_1_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__Irbe__6828_A1_L43_1_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes__Irbe__6828_A1_L43_1_02.xyz