Custom Map Tile Generator using Gdal2Tile.py

Installation

For Ubuntu

sudo apt install python3

Install python for other os.

Prerequisites

sudo apt install python3-gdal
sudo apt install gdal-bin

Script to create Map tiles

#!/bin/bash
echo "Script Started..."
while :; do
    case $1 in
    -file)
        if [ "$1" ] && [ "$2" ]; then
            fileName=$2
            shift
        else
            echo 'ERROR: "--file" requires a non-empty option argument.'
            exit 0;
        fi
        ;;
    -ulx)
        if [ "$1" ] && [ "$2" ]; then
            ulx=$2
            shift
        else
            echo 'ERROR: "--ulx" requires a non-empty option argument.'
            exit 0;
        fi
        ;;
    -uly)
        if [ "$1" ] && [ "$2" ]; then
            uly=$2
            shift
        else
            echo 'ERROR: "--uly" requires a non-empty option argument.'
            exit 0;
        fi
        ;;
    -llx)
        if [ "$1" ] && [ "$2" ]; then
            llx=$2
            shift
        else
            echo 'ERROR: "--llx" requires a non-empty option argument.'
            exit 0;
        fi
        ;;
    -lly)
        if [ "$1" ] && [ "$2" ]; then
            lly=$2
            shift
        else
            echo 'ERROR: "--lly" requires a non-empty option argument.'
            exit 0;
        fi
        ;;
    -?*)
        printf 'WARN: Unknown option\n'
        exit 0;
        ;;
    *)
        break
        ;;
    esac
    shift
done
if [ ! -f "$fileName" ]; then
    echo "$fileName not Found."
    exit 0;
fi
data=`gdalinfo -json $fileName`
key='colorTable'
dir=$(echo "$fileName" | cut -f 1 -d '.')
if [[ "$data" == *"$key"* ]]; then
    gdal_translate -of GTiff -a_srs EPSG:4326 -a_ullr $ulx $uly $llx $lly $fileName temp.tif
    gdal_translate -of GTiff -expand rgba temp.tif output.tif

    if [ -d "$dir" ] && [ "$(ls -A $dir)" ]; then
        rm -r $dir/*
    fi
    gdal2tiles.py --processes=2  output.tif $dir
    rm temp.tif output.tif 
else
    gdal_translate -of GTiff -a_srs EPSG:4326 -a_ullr $ulx $uly $llx $lly $fileName output.tif
    if [ -d "$dir" ] && [  "$(ls -A $dir)" ]; then
         rm -r $dir/*
    fi
    gdal2tiles.py --processes=2  output.tif $dir
    rm output.tif 
fi
echo "done"

Syntax to run he script

./createTiles.sh -file <imageFile> -ulx <upper Latitude x - coordinate> -uly <upper Latitude y - coordinate> -llx <Lower Latitude x - coordinate> -lly <Lower Latitude  - coordinate>

License

MIT