Comments on: Playing with Functional Attributes http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/ "A picture is only worth a thousand words. A map may be worth a thousand numbers. But a GIS is worth a thousand tables." Thu, 26 Jan 2012 23:22:46 +0000 hourly 1 http://wordpress.com/ By: Bill http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-241 Sun, 14 Oct 2007 14:27:00 +0000 http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-241 Recently, I had a need for this functional attribute. Being somewhat ignorant of the Microstation design file format and its limitations, I was surprised to see that some of my features in Geomedia failed to export to dgn file or were clipped on the edges. Basically it was the limitation of the extents of the seed file that I had to use. I needed to figure out what exact extents this seed file had and display it in Geomedia so that I could ensure that future exports to dgn exported the features I wanted. So heres what I did:

1. Created a large square polygon that was certain to exceed the geographic extents of my seed file.
2. Filled that polygon with 100,000 points using the DOTDENSITY functional attribute
3. Export those points to design file using my seed file.
4. Import that new dgn file back into Geomedia
5. Now the imported points created a perfect square showing the geographic extents of my seed file.

Im sure there must be an easier way to accomplish this, but this was the first thing that came to mind, and it worked perfectly.

]]> By: Jeff Hobbs http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-222 Thu, 11 Oct 2007 03:45:43 +0000 http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-222 Sean – great point! It’s really fairly interesting how many different uses some of these functions can have.

]]> By: Sergey http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-218 Mon, 08 Oct 2007 13:06:50 +0000 http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-218 For patterning you probably need to make the number of dots proportional to the feature’s area.

]]> By: Sean Davies http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-217 Sun, 07 Oct 2007 13:44:28 +0000 http://jeffhobbs.net/2007/10/04/playing-with-functional-attributes/#comment-217 Jeff – The great thing about receiving information like this is that it sparks new ideas. I’m building a map for Intergraph’s I/CAD software, and patterning isn’t supported. It strikes me I can use this information about DOTDENSITY to mimic a pattern within an area, and then output that to my map as patterning. That wasn’t your intention in your blog, but it shows the importance of seeing what other people are doing and using it for your own workflows. You’ve added to my arsenal–thanks!

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