#!/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 23.682850009211 56.949356576765 -gcp 12744.0 0.0 23.806534317757 56.956551598955 -gcp 12744.0 12681.0 23.823195008444 56.891022729216 -gcp 0.0 12681.0 23.699510699898 56.883827707026 LVVA_F7404_US1_GV3_0002.jpg LVVA_F7404_US1_GV3_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"646.5 5178.0\n675.0 543.0\n11808.0 708.0\n11751.0 3109.5\n10104.0 3067.5\n10072.5 4369.5\n10000.5 4473.0\n9961.5 11415.0\n5277.0 11382.0\n502.5 11325.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV3_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV3_0002.vrt LVVA_F7404_US1_GV3_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV3_0002.cut.vrt LVVA_F7404_US1_GV3_0002.xyz