#!/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 25.737573189851393 57.83515284344804 -gcp 17364.0 0.0 27.348842489343532 57.66877025023835 -gcp 17364.0 15414.0 27.069957562847822 56.91500459457629 -gcp 0.0 15414.0 25.485980077234842 57.07534143555462 Viduseuropas_specialas_topografiskas_kartes_Gaujiena__6828_A1_L43_5_02.JPG Viduseuropas_specialas_topografiskas_kartes_Gaujiena__6828_A1_L43_5_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 -cutline "POLYGON((909 937, 909 3716, 4916 3731, 4920 942, 909 937))" Viduseuropas_specialas_topografiskas_kartes_Gaujiena__6828_A1_L43_5_02.vrt Viduseuropas_specialas_topografiskas_kartes_Gaujiena__6828_A1_L43_5_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_Gaujiena__6828_A1_L43_5_02.cut.vrt Viduseuropas_specialas_topografiskas_kartes_Gaujiena__6828_A1_L43_5_02.xyz