#!/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 24.670535331938 57.642327170257 -gcp 9912.0 0.0 24.811248779297 57.656698413023 -gcp 9912.0 7920.0 24.832277297974 57.590745297036 -gcp 0.0 7920.0 24.690058115391 57.574406459057 LVVA_F7404_US1_GV318_0002.jpg LVVA_F7404_US1_GV318_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"423.0 426.0\n9420.0 561.0\n9306.0 4944.0\n6654.0 4872.0\n6658.5 7188.0\n360.0 7182.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV318_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV318_0002.vrt LVVA_F7404_US1_GV318_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV318_0002.cut.vrt LVVA_F7404_US1_GV318_0002.xyz