#!/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 25.261173248291 57.184599583586 -gcp 8820.0 0.0 25.275850296021 57.131348574193 -gcp 8820.0 20058.0 25.088739395142 57.114901617208 -gcp 0.0 20058.0 25.070629119873 57.16994458562 LVVA_F7404_US1_GV1720_0002.jpg LVVA_F7404_US1_GV1720_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"882.0 1359.0\n7914.0 1341.0\n7983.0 14646.0\n988.5 14649.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1720_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1720_0002.vrt LVVA_F7404_US1_GV1720_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1720_0002.cut.vrt LVVA_F7404_US1_GV1720_0002.xyz