#!/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 24.924545288086 57.533151146107 -gcp 6993.0 0.0 25.02685546875 57.552911921656 -gcp 6993.0 8217.0 25.066423416138 57.491198866688 -gcp 0.0 8217.0 24.967803955078 57.469789240698 LVVA_F7404_US1_GV275_0002.jpg LVVA_F7404_US1_GV275_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"307.5 4780.875\n312.0 138.0\n6504.0 99.0\n6498.0 1254.0\n6631.5 1339.5\n6735.0 1467.0\n6691.5 2223.0\n6621.0 2653.5\n6501.0 2817.0\n6489.0 4737.0\n6528.0 7383.0\n1914.0 7362.0\n1820.25 4781.25\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV275_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV275_0002.vrt LVVA_F7404_US1_GV275_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV275_0002.cut.vrt LVVA_F7404_US1_GV275_0002.xyz