#!/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 4866.0 5622.0 26.999498333333335 56.45764 -gcp 41172.0 5526.0 27.041158333333332 56.45764 -gcp 41220.0 38406.0 27.041158333333332 56.43681 -gcp 4896.0 38502.0 26.999498333333335 56.43681 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.JPG LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4866.0 5622.0\n41172.0 5526.0\n41220.0 38406.0\n4896.0 38502.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.vrt LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.cut.vrt LVVA-001679-0217-003702-PLANSETE-095-a-9_3702.xyz