#!/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 23.152012922956228 56.81103082199941 -gcp 17364.0 0.0 24.726479560305805 56.675244949141685 -gcp 17364.0 15414.0 24.498270012497134 55.921971068218454 -gcp 0.0 15414.0 22.957735295733677 56.04949340783541 Viduseuropas_specialas_topografiskas_kartes_Bauska__6828_A1_L43_17_02.JPG Viduseuropas_specialas_topografiskas_kartes_Bauska__6828_A1_L43_17_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((936 1014, 939 3813, 4966 3832, 4968 1034, 936 1014))" Viduseuropas_specialas_topografiskas_kartes_Bauska__6828_A1_L43_17_02.vrt Viduseuropas_specialas_topografiskas_kartes_Bauska__6828_A1_L43_17_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_Bauska__6828_A1_L43_17_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Bauska__6828_A1_L43_17_02.xyz