#!/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 25.171909332275 57.722531855972 -gcp 11517.0 0.0 25.281171798706 57.729635629537 -gcp 11517.0 12402.0 25.297222137451 57.667763119234 -gcp 0.0 12402.0 25.186157226563 57.660050319374 LVVA_F7404_US1_GV1944_0002.jpg LVVA_F7404_US1_GV1944_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1006.5 5038.5\n10458.0 5220.0\n10414.5 11268.75\n883.5 11236.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1944_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1944_0002.vrt LVVA_F7404_US1_GV1944_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1944_0002.cut.vrt LVVA_F7404_US1_GV1944_0002.xyz