Alexey Smirnov's blog

It is well known that Google spends a lot of effort on various cool things. Its advances in technology make it possible for people to do things they could not do before. I always wanted to express myself in art but when I was in school I never managed to draw a decent painting. But with Google Sketchup and Building Maker I can build models of everything with the assistance of computer and the web. A great combination of a number of technologies: satellite imaging, graphics, web programming, user interfaces.

Google Earth is a program that many people have spent hours playing with. But those attractive 3D models of buildings were a privilege of qualified engineers and designers until recently. Given the ambicious goal of modeling every city on Earth Google had to ask for help of the community. Because not everybody is a gifted designer, Google has created Building Maker, a tool that presents an image of a building to a user and asks to find a shape that matches its best.

A few basic shapes are available: box, prism, etc. A box is used to model the body of the house whereas a prism is used to model the roof. It is possible to define relationships between elements, that is to specify that one is situated next to another.

Once the user has aligned all visible points on one image she can move on to the next one. After aligning the model you can submit it for review. Once it gets accepted to the buildings layer you can see it using Google Earth and also everybody else will see it. All this beauty (including Google Earth) lives within a window of your browser. I wonder which language it was written in. Obviously, browser applications are matching desktop applications in their capabilities and functionality.

But this cool technology relies on so-cold bird-eye views of cities which are not available everywhere. Another limitation of this technology is the basic set of shapes that building maker has. This is why if you want to model more complex buildings you have to use Sketchup, a 3D drawing program.

Of course, Sketchup facilitates the process through image-matching technology. You can load a photo into Sketchup, align axes and use the image essentially in the same way as in Building Maker. However, a lot more shapes are available: circles, arcs, as well as tools to manipulate them. After constructing the first version of your model you can use additional photographs as textures of its faces. As with Building Maker, it is possible to get the model added to the buildings layer of Google Earth after review.

I have created models with both tools. Obviously, using photo matching in Sketchup takes longer because you have to apply textures to each face of the model manually. I have spent several days creating a model of a school next to our house. The model consists of several boxes. The main problem was connecting the boxes to make sure that there were no holes in the model. At one point I had a seemingly good model except that when I tried to build the roof it was breaking up into pieces. It turned out that the problem was in one wall which height was slightly less than heights of other walls, and therefore, there was a crack between the roof and that wall. Once you get used to measuring heights and widths of everything constructing becomes a lot easier. I would estimate the learning time of Sketchup as one week. But I have not started working with circular shapes yet! That’s the next level of skill!

These are the models that I have built so far. Click on the image to see 3D model.

This entry was posted on Friday, May 28th, 2010 at 5:05 am and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.