#!/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 25.896788374385 56.924890878258 -gcp 10626.0 0.0 26.006366552287 56.93173962964 -gcp 10626.0 8769.0 26.018497064429 56.881222679926 -gcp 0.0 8769.0 25.908918886527 56.874373928544 LVVA_F7404_US1_GV1098_0002.jpg LVVA_F7404_US1_GV1098_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"543.0 666.0\n10284.0 705.0\n10260.0 6450.0\n6555.0 6417.0\n4671.0 6474.0\n3315.0 6432.0\n3303.0 7884.0\n561.0 7890.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1098_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1098_0002.vrt LVVA_F7404_US1_GV1098_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1098_0002.cut.vrt LVVA_F7404_US1_GV1098_0002.xyz