#!/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 22.279101532336853 57.72587833652949 -gcp 17364.0 0.0 23.912580683593685 57.60447454197763 -gcp 17364.0 15237.0 23.697032866655125 56.853796380531634 -gcp 0.0 15237.0 22.09851697863083 56.980981419206074 Viduseuropas_specialas_topografiskas_kartes_Talsi__6828_A1_L43_7_02.JPG Viduseuropas_specialas_topografiskas_kartes_Talsi__6828_A1_L43_7_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((872.25 1091.999444752915, 876 3893, 4857 3903, 4844 1095, 872.25 1091.999444752915))" Viduseuropas_specialas_topografiskas_kartes_Talsi__6828_A1_L43_7_02.vrt Viduseuropas_specialas_topografiskas_kartes_Talsi__6828_A1_L43_7_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_Talsi__6828_A1_L43_7_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Talsi__6828_A1_L43_7_02.xyz