#!/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 24.689798355103 57.696625646497 -gcp 15945.0 0.0 24.841461181641 57.70598153103 -gcp 15945.0 21597.0 24.861677952229 57.598329712086 -gcp 0.0 21597.0 24.710553572495 57.588746889255 LVVA_F7404_US1_GV1897_0002.jpg LVVA_F7404_US1_GV1897_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"801.0 0.0\n15942.0 0.0\n15942.0 13767.0\n9939.0 13851.0\n777.0 13755.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1897_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1897_0002.vrt LVVA_F7404_US1_GV1897_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1897_0002.cut.vrt LVVA_F7404_US1_GV1897_0002.xyz