GDAL Virtual Raster (beta)
Open BetabetaVRT는 래스터 데이터셋에 대한 GDAL의 XML 기술입니다. 본 서비스는 VRT를 렌더링된 GeoTIFF와 함께 하나의 ZIP(map.vrt.zip)으로 묶습니다 — 그렇지 않으면 gdalinfo/gdal_translate가 "map.tif not found" 오류로 실패합니다. 베타: 현재는 오버뷰가 없는 단일 밴드 세트입니다.
주요 기능
VRT 형식 소개
VRT is a service format of GDAL: an XML file that contains no pixels but describes where they lie and how to read them. That is the usual way to stitch mosaics and redefine referencing without copying gigabytes of raster.
We hand over the VRT together with the raster itself: the map.vrt.zip archive holds the XML description and the rendered map as a GeoTIFF. That was done deliberately — a lone .vrt would refer to a file you do not have, and gdalinfo simply would not open it.
The XML records the WGS84 coordinate system, the georeferencing (corner coordinates and pixel size) and three RGB bands, each pointing at the corresponding band of the GeoTIFF. The format is in beta status: it is one set of bands with no overview pyramids, and the raster itself is a flattened picture of the map rather than vector layers.
VRT 파일을 여는 프로그램
다음 프로그램과 애플리케이션으로 OSM2CDR에서 내보낸 GDAL Virtual Raster (beta)(.vrt.zip) 파일을 열고 편집하고 작업할 수 있습니다:
Format specifications
- Open standard
- 2D only
- Lossless (no quality loss)
- No attributes
- Output: 1 file
- GDAL Virtual Raster (.vrt). XML descriptor referencing source rasters; lazy mosaicing without copying pixels.
VRT 지도 사용자
VRT 내보내기 방법
내보낸 뒤 여는 방법
- Unpacking is a mandatory first step: map.vrt and map.tif must lie next to each other in the same folder, since the reference inside the XML is relative.
- GDAL — gdalinfo map.vrt will show the size, the referencing and the bands; gdal_translate will convert the set into GeoTIFF, PNG or COG.
- QGIS — Layer → Add Raster Layer and pick map.vrt; the layer will land in its place by coordinates.
- A mosaic — your own .vrt over several rasters is assembled with gdalbuildvrt out.vrt tile1.tif tile2.tif, if the map has to be stitched with other data.
- Editing by hand — VRT is plain XML: the path to the raster, the referencing and the band descriptions can be fixed in a text editor.
VRT 형식의 인기 지도
GDAL Virtual Raster (beta) 지도 내보내기 받기
OpenStreetMap에서 전문가용 VRT 지도를 다운로드하세요. 즉시 생성, 모든 영역 지원.