#!/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 2880.0 3759.0 26.5 56 -gcp 24816.0 3555.0 26.75 56 -gcp 25074.0 29871.0 26.75 55.833333333333336 -gcp 2994.0 30108.0 26.5 55.833333333333336 mapster/RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.jpg RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2880.0 3759.0\n24816.0 3555.0\n25074.0 29871.0\n2994.0 30108.0" | \
  gdaltransform -tps -output_xy RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.vrt RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.cut.vrt RKKA050_N-35-6-A_Dvinsk_-1913_UInd-VAC9619-000403@1734450.xyz