#!/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 4770.0 5430.0 21.458598333333335 57.33249333333333 -gcp 40104.0 5496.0 21.50026 57.33249333333333 -gcp 40158.0 39282.0 21.50026 57.311665 -gcp 4794.0 39204.0 21.458598333333335 57.311665 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.JPG LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4770.0 5430.0\n40104.0 5496.0\n40158.0 39282.0\n4794.0 39204.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.vrt LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.cut.vrt LVVA-001679-0217-000002-PLANSETE-002-i-4_0002.xyz