miercuri, 5 ianuarie 2011

Jack Dangermond on A New Modality for GIS

miercuri, 21 iulie 2010

Blaise Aguera y Arcas demos new augmented-reality mapping technology from Microsoft.


Blaise Agüera y Arcas is the architect of Bing Maps at Microsoft, building augmented reality into searchable maps. He's also the co-creator of Photosynth, software that assembles static photos into a synergy of zoomable, navigatable spaces.

Blaise Aguera y Arcas' background is as multidimensional as the visions he helps create. In the 1990s, he authored patents on both video compression and 3D visualization techniques, and in 2001, he made an influential computational discovery that cast doubt on Gutenberg's role as the father of movable type.

He also created Seadragon (acquired by Microsoft in 2006), the visualization technology that gives Photosynth its amazingly smooth digital rendering and zoom capabilities. Photosynth itself is a vastly powerful piece of software capable of taking a wide variety of images, analyzing them for similarities, and grafting them together into an interactive three-dimensional space. This seamless patchwork of images can be viewed via multiple angles and magnifications, allowing us to look around corners or "fly" in for a (much) closer look. Simply put, it could utterly transform the way we experience digital images. He's now the architect of Bing Maps at Microsoft, where he leads a team of researchers and engineers with strengths in social media, computer vision and graphics. He joined Microsoft when Seadragon was acquired by Live Labs in 2006. Shortly after the acquisition of Seadragon, Blaise directed his team in a collaboration with Microsoft Research and the University of Washington, leading to the first public previews of Photosynth several months later. His TEDTalk on Seadragon and Photosynth in 2007 is rated one of TED's "most jaw-dropping."

"Perhaps the most amazing demo I've seen this year."

Ethan Zuckerman, TED attendee and Global Voices blogger

duminică, 6 iunie 2010

DWG to SHP [from AutoCAD to ArcGIS]


If you do a lot of work in both ArcGIS and AutoCAD, as i do, you will know the difficulties of converting between the two. Although AutoCAD files can be directly imported into ArcGIS and ArcGIS can export to DWF files (which are directly compatible with AutoCAD), jumping between the two can have extremely annoying hidden difficulties.

This post, as well as this blog, will focus on working in the two environments and making your work mesh together in concert. This post is a guide for to simply add Autodesk Autocad DWG drawings into ArcGIS 9.2. So, without further ado...

As with any ArcGIS document, you need to make sure that you .DWG file is saved in a directory that is no further than two folders from the root drive. In addition, you must make sure that there are no spaces in the folder or filenames. eg. c:\Arc\GIS\cadfile.dwg

Next open and save a ArcMap document in the same folder. There can be spaces in this filename. Add data to the data frame > select the autoCAD document you wish to import. If the CAD is simplistic and is only one layer, you are done! However, since 99% of CAD documents do not fall within this description, you are not done.

The CAD document, by default, combines all the layers, annotation, etc... into one group layer in ArcGIS. You can expand this group layer and see the nonsensical way it displays the 5 layers within it by default - complete with annoying ArcGIS random colours and and strange coordinate/range descriptions. They will fall under categories like annotation, point, polygon, polyline etc... These are the filetypes that ArcGIS is most familiar with, but who wants them in one layer!? And the descriptions of the symbology is equally confusing. eg. continuous 4,62 etc...

Your goal is most likely to seperate the layers back to the point that they used to be when you had them in AutoCAD 2008 (or whatever version you are using). You may want all of the layers or you may want a select few. The process, as of right now, is somewhat confusing. I am currently working on a more streamlined process and will be blogging about it soon. But for now here is the method for extracting autocad layers from ArcGIS:

To do this, we must first right click on the CADD layer within the group layer > properties > drawing layers tab > then click disable all > then click the first of the layers you want to isolate (only one unless you want to combine several layers into one layer).

Close the window > right click again on the layer > go to data > expand it > click export data...
> chose a place to save the file and a file name and voila!

You have a layer that is an ESRI shape file (.shp). You can repeat this conversion process for each of the AutoCAD layers you want made into ESRI ArcGIS layers.

As I said, I am currently writing code to streamline this process and it will be done and posted on these forums soon!

also you can used CadToShape ... trial version here!