#!/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 25.292587280273 57.553050071171 -gcp 10323.0 0.0 25.397129058838 57.562258857097 -gcp 10323.0 15444.0 25.412750244141 57.483356279166 -gcp 0.0 15444.0 25.309925079346 57.475281267951 LVVA_F7404_US1_GV1383_0002.jpg LVVA_F7404_US1_GV1383_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"459.0 684.0\n9987.0 624.0\n10059.0 9690.0\n543.0 9613.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1383_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1383_0002.vrt LVVA_F7404_US1_GV1383_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1383_0002.cut.vrt LVVA_F7404_US1_GV1383_0002.xyz