#!/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 2865.0 1821.0 32.33721666666667 62 -gcp 12096.0 2151.0 36.33721666666667 62 -gcp 12069.0 22395.0 36.33721666666667 58 -gcp 1644.0 21978.0 32.33721666666667 58 Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.JPG Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2865.0 1821.0\n12096.0 2151.0\n12069.0 22395.0\n1644.0 21978.0" | \
  gdaltransform -tps -output_xy Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.vrt Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.cut.vrt Karadarbibas_kartes_Krievijas_teritorija_Petrozavodska__6828_A1_L66_1_02.xyz