#!/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 23.498299824465715 56.525462502082604 -gcp 0.0 16341.0 23.528565036946443 56.523876489253276 -gcp 12174.0 16341.0 23.526422879504327 56.511413724334275 -gcp 12174.0 0.0 23.496167515116248 56.51299923683433 07_Rajons_Zalenieki/LNA_KFFDA_F106_1_4249N.jpg LNA_KFFDA_F106_1_4249N.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 16341.0\n12174.0 16341.0\n12174.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4249N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4249N.vrt LNA_KFFDA_F106_1_4249N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4249N.cut.vrt LNA_KFFDA_F106_1_4249N.xyz