#!/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 4830.0 5982.0 23.33334 56.83257666666667 -gcp 40656.0 6030.0 23.375 56.83257666666667 -gcp 40686.0 39792.0 23.375 56.811748333333334 -gcp 4872.0 39714.0 23.33334 56.811748333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.JPG LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4830.0 5982.0\n40656.0 6030.0\n40686.0 39792.0\n4872.0 39714.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.vrt LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.cut.vrt LVVA-001679-0217-002037-PLANSETE-029-i-1_2037.xyz