#!/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 4962.0 6048.0 23.250016666666667 56.936726666666665 -gcp 40668.0 6186.0 23.291678333333333 56.936726666666665 -gcp 40620.0 39966.0 23.291678333333333 56.91589666666667 -gcp 4896.0 39786.0 23.250016666666667 56.91589666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.JPG LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4962.0 6048.0\n40668.0 6186.0\n40620.0 39966.0\n4896.0 39786.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.vrt LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.cut.vrt LVVA-001679-0217-001939-PLANSETE-029-b-15_1939.xyz