JPEG 2000 — Wavelet Image Compression
Open BetaJPEG 2000 (.jp2) is the ISO/IEC 15444 international standard that uses a wavelet transform instead of the block DCT of ordinary JPEG. On osm2cdr.ru the map is rendered to PNG and then converted to .jp2 through GDAL's JP2OpenJPEG driver. Wavelet compression gives graceful degradation without blocky artefacts and multi-resolution decode. Both lossy and lossless modes are supported. The output is a raster RGB image of the map (not a multi-band satellite scene); it is a compact replacement for heavy PNG in high-resolution map posters and raster overlays.
Viktiga funktioner
Vilket program öppnar JPEG 2000-filer
Följande program och applikationer kan öppna, redigera och arbeta med JPEG 2000 — Wavelet Image Compression-filer (.jp2) som exporterats från OSM2CDR:
Format specifications
- Open standard
- 2D only
- Lossy compression
- No attributes
- Output: 1 file
- A single .jp2 (ISO/IEC 15444) converted from PNG via the GDAL JP2OpenJPEG driver; wavelet compression, lossy by default with multi-resolution decode, an RGB map snapshot.
Vem använder JPEG 2000-kartor
Så exporterar du JPEG 2000
Populära kartor i JPEG 2000
Hämta kartexporter i JPEG 2000 — Wavelet Image Compression
Ladda ner professionella JPEG 2000-kartor från OpenStreetMap. Direktgenerering, valfritt område.