#!/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 25.318617607003 57.045066073669 -gcp 14925.0 0.0 25.46308728974 57.053466816001 -gcp 14925.0 11514.0 25.475946536298 56.99377426713 -gcp 0.0 11514.0 25.331476853561 56.985373524798 LVVA_F7404_US1_GV1742_0002.jpg LVVA_F7404_US1_GV1742_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"519.0 465.0\n4746.0 492.0\n4767.0 3291.0\n5184.0 3294.0\n5311.5 3358.5\n9963.0 3393.0\n14529.0 3369.0\n14487.0 10599.0\n9930.0 10527.0\n5263.875 10520.25\n501.75 10474.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1742_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1742_0002.vrt LVVA_F7404_US1_GV1742_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1742_0002.cut.vrt LVVA_F7404_US1_GV1742_0002.xyz