#!/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 24.502643590200083 57.53141227342446 -gcp 17364.0 0.0 26.095057843266517 57.37438031724754 -gcp 17364.0 15414.0 25.825482631213724 56.62359411572849 -gcp 0.0 15414.0 24.25605789201743 56.77898677612467 Viduseuropas_specialas_topografiskas_kartes_Turaida__6828_A1_L43_9_02.JPG Viduseuropas_specialas_topografiskas_kartes_Turaida__6828_A1_L43_9_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((910 972, 945 3772, 4968 3750, 4931 944, 910 972))" Viduseuropas_specialas_topografiskas_kartes_Turaida__6828_A1_L43_9_02.vrt Viduseuropas_specialas_topografiskas_kartes_Turaida__6828_A1_L43_9_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_Turaida__6828_A1_L43_9_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Turaida__6828_A1_L43_9_02.xyz