#!/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 24.996814727783 57.737700159106 -gcp 5835.0 0.0 25.022563934326 57.690524675163 -gcp 5835.0 13551.0 24.824123382568 57.657524939246 -gcp 0.0 13551.0 24.79848540723208 57.70388075443469 LVVA_F7404_US1_GV384_0002.jpg LVVA_F7404_US1_GV384_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"558.0 6583.125\n648.0 450.0\n5373.0 504.0\n5274.0 6678.0\n5202.0 12867.0\n501.0 12792.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV384_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV384_0002.vrt LVVA_F7404_US1_GV384_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV384_0002.cut.vrt LVVA_F7404_US1_GV384_0002.xyz