#!/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 26.343455314636 57.429612361295 -gcp 10236.0 0.0 26.43593788147 57.443101936137 -gcp 10236.0 8550.0 26.456108093262 57.401439156825 -gcp 0.0 8550.0 26.365642547607 57.387170953591 LVVA_F7404_US1_GV2076_0002.jpg LVVA_F7404_US1_GV2076_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"459.0 621.0\n9768.0 618.0\n9771.0 7599.0\n444.0 7524.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV2076_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV2076_0002.vrt LVVA_F7404_US1_GV2076_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV2076_0002.cut.vrt LVVA_F7404_US1_GV2076_0002.xyz