#!/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 4680.0 5052.0 21.291955 56.936726666666665 -gcp 40392.0 5304.0 21.333616666666668 56.936726666666665 -gcp 40278.0 39018.0 21.333616666666668 56.91589666666667 -gcp 4554.0 38796.0 21.291955 56.91589666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.JPG LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4680.0 5052.0\n40392.0 5304.0\n40278.0 39018.0\n4554.0 38796.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.vrt LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.cut.vrt LVVA-001679-0217-000050-PLANSETE-004-b-16_0050.xyz