#!/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 4932.0 7488.0 24.124896666666668 56.43681 -gcp 41040.0 7464.0 24.166556666666665 56.43681 -gcp 41046.0 40278.0 24.166556666666665 56.41598 -gcp 4914.0 40308.0 24.124896666666668 56.41598 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.JPG LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4932.0 7488.0\n41040.0 7464.0\n41046.0 40278.0\n4914.0 40308.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.vrt LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.cut.vrt LVVA-001679-0217-002849-PLANSETE-041-a-16_2849.xyz