#!/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 4842.0 6498.0 23.250016666666667 56.47847 -gcp 40980.0 6480.0 23.291678333333333 56.47847 -gcp 41094.0 40236.0 23.291678333333333 56.45764 -gcp 4932.0 40254.0 23.250016666666667 56.45764 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.JPG LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4842.0 6498.0\n40980.0 6480.0\n41094.0 40236.0\n4932.0 40254.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.vrt LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.cut.vrt LVVA-001679-0217-002218-PLANSETE-031-b-7_2218.xyz