#!/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 24.686875185555 57.707677682353 -gcp 15945.0 0.0 24.838530342034 57.716783632439 -gcp 15945.0 21597.0 24.85862731933594 57.60780806806424 -gcp 0.0 21597.0 24.707651138305668 57.59851881907438 LVVA_F7404_US1_GV1897_0003.jpg LVVA_F7404_US1_GV1897_0003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"891.0 1840.5\n10542.0 1821.0\n10560.0 0.0\n15942.0 0.0\n15942.0 2574.0\n891.0 2567.25\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1897_0003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1897_0003.vrt LVVA_F7404_US1_GV1897_0003.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1897_0003.cut.vrt LVVA_F7404_US1_GV1897_0003.xyz