#!/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 25.57192325592 56.637539455113 -gcp 11517.0 0.0 25.672302246094 56.646789752671 -gcp 11517.0 13287.0 25.69079875946 56.580760958541 -gcp 0.0 13287.0 25.590419769286 56.571510660983 LVVA_F7404_US1_GV1676_0002.jpg LVVA_F7404_US1_GV1676_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1200.0 480.0\n10329.0 714.0\n10323.0 1344.0\n10410.0 1480.5\n10363.5 1708.5\n10495.5 1770.0\n10470.0 2682.0\n10300.5 2800.5\n10242.0 5158.5\n10254.0 12045.0\n1050.0 12018.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1676_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1676_0002.vrt LVVA_F7404_US1_GV1676_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1676_0002.cut.vrt LVVA_F7404_US1_GV1676_0002.xyz