# 1. 가상 VRT 생성
```bash
gdalbuildvrt "C:\ujsky\source_all.vrt" "D:\uj_2026\*.tif"
```


# 2. 좌표변환
```bash
gdalwarp -s_srs EPSG:5187 -t_srs EPSG:3857 -of VRT ^
"C:\ujsky\source_all.vrt" "C:\ujsky\merged_3857.vrt"
```


# 3. TMS 변환
```bash
gdal2tiles ^
    --zoom=16-20 ^
    --processes=14 ^
    -w openlayers ^
    --tmscompatible ^
    --tiledriver=JPEG ^
    --config GDAL_CACHEMAX 8192 ^
    "C:\ujsky\merged_3857.vrt" "C:\ujsky\UJ_2026"
```