GDAL Virtual Raster (beta)
Open BetabetaVRT ir GDAL XML apraksts rastra datu kopai. Mēs iepakojam VRT kopā ar atveidotu GeoTIFF vienā ZIP failā (map.vrt.zip) — pretējā gadījumā gdalinfo/gdal_translate neizdodas ar kļūdu "map.tif not found". Beta: pagaidām viena joslu kopa bez pārskatiem.
OpenStreetMap data as of 24 August 2026 · 35 days ago
Galvenās iespējas
Par VRT formātu
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.
Kura programma atver VRT failus
Tālāk norādītās programmas un lietotnes var atvērt, rediģēt un strādāt ar GDAL Virtual Raster (beta) (.vrt.zip) failiem, kas eksportēti no OSM2CDR:
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.
Kas izmanto VRT kartes
Kā eksportēt VRT
Kā atvērt pēc eksporta
- 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.
Populāras kartes formātā VRT
Eksportējiet kartes formātā GDAL Virtual Raster (beta)
Lejupielādējiet profesionālas VRT kartes no OpenStreetMap. Tūlītēja ģenerēšana, jebkurš apgabals.
Biežāk uzdotie jautājumi
What people who already downloaded say
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