#!/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 4740.0 5514.0 21.375276666666668 57.020046666666666 -gcp 40338.0 5610.0 21.396108333333334 57.020046666666666 -gcp 40332.0 39366.0 21.396108333333334 57.009631666666664 -gcp 4734.0 39246.0 21.375276666666668 57.009631666666664 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.JPG LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4740.0 5514.0\n40338.0 5610.0\n40332.0 39366.0\n4734.0 39246.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.vrt LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.cut.vrt LVVA-001679-0217-000039-PLANSETE-003-i-14-I_0039.xyz