Google now has the ability to search for text in .dwg drawing files stored on the Internet. For example, enter the following into the search engine:
And you see something like this:
File Format: AutoCAD 1.4 - View as HTML
FASTENERS. HANDRAIL. 6" WIDE 16 GA. STEEL BACKING. PLATE SCREWED TO CT STUDS. 1" GYPROC FIREGUARD SHAFTLINER. HANDRAIL. 6" X 6" X 16 GA. STEEL PLATE. ...
www.gp.com/build/cad/dwg/gp99-49.dwg - Similar pages
Some notes about what we are looking at:
* Click on FASTENERS, and your Web browser attempts to open the file with AutoCAD.
* Click on View as HTML, and Google displays all the text found in the drawing in a CAD-looking font, in colors.
* Google reports only v1.2 through v1.4 formats, versions last used in the mid 1980s. I wonder if this is a mistake, and should be R12 through R14. [Yes: see below.]
* Every drawing displayed as HTML uses the same narrow Leroy font.
* When the dwg format is "Unrecognized", Google usually (but not always) displays no text when viewed as HTML.
* Clicking on Google's Images tab results in no images found, so clearly Google is only searching for text in drawings.
* Substituting other CAD file formats, such as .dgn, returns files but not text searches.
* Entering ".dwg" filetype:dwg returns 147,000 results.
* Google is apparently not a member of the Open Design Alliance.
The version numbers reported by Google are a puzzle. I opened some drawings, and found that the programmer at Google got it wrong:
Google = v1.4 --> DWG = AC1014 or AutoCAD R14 and LT 97
Google = v1.3 --> DWG = AC1012 or AutoCAD R13 and LT 95
Google = v1.2 --> DWG = AC1009 or AutoCAD R12
There are some interesting drawing filenames out there:
- www.compostingtoilet.com/LITRACK/FNX2000 Dimensions & Clearances.dwg
(Thanks to TenLinks.com for finding this tidbit at google-blog.)