#!/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 25.036211013794 57.621875380195 -gcp 9672.0 0.0 25.176801681519 57.637177739121 -gcp 9672.0 10365.0 25.209932327270508 57.553878957254646 -gcp 0.0 10365.0 25.06513595581055 57.5370212325684 LVVA_F7404_US1_GV262_0002.jpg LVVA_F7404_US1_GV262_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"414.0 342.0\n6624.0 396.0\n6600.0 5945.25\n9409.5 5969.25\n9391.5 8224.5\n6609.0 8191.5\n6603.0 9795.0\n405.0 9774.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV262_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV262_0002.vrt LVVA_F7404_US1_GV262_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV262_0002.cut.vrt LVVA_F7404_US1_GV262_0002.xyz