#!/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 0.0 0.0 21.170654296875004 50.169861746007314 -gcp 21600.0 0.0 22.445755004882816 50.146546349159706 -gcp 21600.0 30417.0 22.382583618164062 48.98337149775796 -gcp 0.0 30417.0 21.12533569335938 49.00364573861305 GX4143/GX_4143_SK_Pilot_Plot_A_1_of_2.jpg GX_4143_SK_Pilot_Plot_A_1_of_2.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 30414.0\n21597.0 30414.0\n21597.0 0.0" | \
  gdaltransform -tps -output_xy GX_4143_SK_Pilot_Plot_A_1_of_2.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4143_SK_Pilot_Plot_A_1_of_2.vrt GX_4143_SK_Pilot_Plot_A_1_of_2.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4143_SK_Pilot_Plot_A_1_of_2.cut.vrt GX_4143_SK_Pilot_Plot_A_1_of_2.xyz