#!/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 26.705745980256 57.202757071301 -gcp 10533.0 0.0 26.819017718429 57.204172820766 -gcp 10533.0 16080.0 26.81698363225 57.116544005388 -gcp 0.0 16080.0 26.703711894078 57.115128255922 LVVA_F7404_US1_GV1818_0002.jpg LVVA_F7404_US1_GV1818_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"417.0 7900.5\n449.25 7824.0\n504.0 441.0\n5346.0 564.0\n10152.0 678.0\n9990.0 8028.0\n5187.0 7938.0\n5175.0 14970.0\n432.0 14946.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1818_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1818_0002.vrt LVVA_F7404_US1_GV1818_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1818_0002.cut.vrt LVVA_F7404_US1_GV1818_0002.xyz