PostScript (.ps)
Open BetaPostScript (.ps) یک زبان توصیف صفحه از Adobe و پیشینهٔ PDF است. استانداردی برای پیشچاپ و بایگانی در نشر علمی، که هزاران چاپگر و سرور RIP از آن پشتیبانی میکنند. ایدهآل برای خطلولهٔ LaTeX (dvips ← ps2pdf) و برای نگهداری چیدمانهای برداری قابل ویرایش نقشه در بایگانیهای بلندمدت.
ویژگیهای کلیدی
دربارهٔ قالب PostScript
PostScript is a page description language invented by Adobe in the early 1980s; PDF grew directly out of it. A .ps file is, in essence, a small program executed by the interpreter inside a printer or a RIP server: it draws vector outlines, text and raster inserts. Level 3 is still understood by office and print-shop devices, and the free Ghostscript opens such a file on any operating system.
An OpenStreetMap map is exported to PostScript when the result goes into a printing or archival pipeline: hand it to a print shop, put it on a RIP, keep the layout in editable vector form for years ahead. For on-screen viewing the format is awkward — usually a .ps is first turned into a PDF with a single command.
Here is how the file is built on our side: QGIS draws the sheet in vector, the labels stay as text with embedded fonts, and then Ghostscript converts the result into PostScript Level 3 with a standard DSC structure. The sheet is 297x210 mm by default (A4 in landscape orientation), raster elements are 300 DPI. PostScript has no layers by the design of the format itself: the map arrives as a single stream of vector commands.
چه برنامهای فایلهای PostScript را باز میکند
برنامهها و نرمافزارهای زیر میتوانند فایلهای PostScript (.ps) (.ps) صادرشده از OSM2CDR را باز و ویرایش کنند و با آنها کار کنند:
Format specifications
- Open standard
- 2D only
- Lossless (no quality loss)
- No attributes
- Output: 1 file
- PostScript Level 3. Page-description language for printers; open with Ghostscript or convert to PDF for viewing.
چه کسانی از نقشههای PostScript استفاده میکنند
چگونه PostScript را خروجی بگیریم
نحوه باز کردن پس از خروجی
- Ghostscript (free) — both viewing and conversion: ps2pdf map.ps map.pdf gives you a PDF, and calling gs with -r300 rasterizes the sheet at the resolution you need.
- GSview on Windows or Evince on Linux — open the .ps directly and look at the page without converting it.
- Adobe Distiller — the regular prepress route: PostScript in, PDF with font and color control out.
- A print shop or a RIP server — the file is handed over as is; agree on the sheet size and margins in advance, otherwise the map will be trimmed at the edge.
- LaTeX — for pdflatex convert the file to PDF with ps2pdf and insert it with the usual includegraphics; in the classic latex + dvips pipeline EPS is more common for illustrations, and you can download that from us too.
نقشههای محبوب در PostScript
خروجی نقشهٔ PostScript (.ps) را دریافت کنید
نقشههای حرفهای PostScript را از OpenStreetMap دانلود کنید. تولید آنی برای هر ناحیه.