#!/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 24.060144424438 57.005598178218 -gcp 10176.0 0.0 24.161853790283 57.011533647793 -gcp 10176.0 8634.0 24.169836044312 56.962806755141 -gcp 0.0 8634.0 24.07018661499 56.956161491154 LVVA_F7404_US1_GV1829_0002.jpg LVVA_F7404_US1_GV1829_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"2610.0 6606.0\n2958.0 5634.0\n3360.0 4926.0\n4374.0 1818.0\n4887.0 390.0\n9930.0 393.0\n9864.0 7848.0\n2448.0 7884.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1829_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1829_0002.vrt LVVA_F7404_US1_GV1829_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1829_0002.cut.vrt LVVA_F7404_US1_GV1829_0002.xyz