#!/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 23.500904505962144 58.03534119465375 -gcp 17541.0 0.0 25.13522427649553 57.90111604152799 -gcp 17541.0 15414.0 24.90283597175951 57.14054097080958 -gcp 0.0 15414.0 23.295295273157247 57.27618056721808 Viduseuropas_specialas_topografiskas_kartes__Limbazi__6828_A1_L43_3_02.JPG Viduseuropas_specialas_topografiskas_kartes__Limbazi__6828_A1_L43_3_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((902 958, 895 3755, 4911.5 3775.0625347029427, 4927.625 989.1245141588007, 902 958))" Viduseuropas_specialas_topografiskas_kartes__Limbazi__6828_A1_L43_3_02.vrt Viduseuropas_specialas_topografiskas_kartes__Limbazi__6828_A1_L43_3_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__Limbazi__6828_A1_L43_3_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes__Limbazi__6828_A1_L43_3_02.xyz