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Urban Surveys: Unmanned Helicopters & Drones

By automatic city capture, unmanned drones

Unmanned aircraft, primarily helicopters capable of High Quality Digital Photography and HD Video are a low cost method to carry out rapid aerial surveys. Using remote control devices it is possible to fly through narrow areas such as city streets or natural obstructions at low or high altitudes. We are looking into this as at the moment due to our work on motion tracking in After Effects to label features in the urban realm (more details in a future post)

The clip below details New York captured using one of the drones:


New York City Aerial 1 – HD from David Quinones on Vimeo.

Take a look at http://www.skycamusa.com/ for full details, over the coming years unmanned drones are going to become a major part of monitoring, planning and surveying the city as costs are coming down to a pro-consumer level. As we mentioned in a previous post, the copyright issues associated with using other peoples data is often a nightmare, as such it is sometimes preferable to map/survey an area yourself.


This is where the Microdrone comes in handy – an unmanned aerial vehicle equipped with a digital camera and a GPS it provides an easy route for gathering data.

Of note in the specifications is the units ability to gather stereo data, allowing essentially a 3D model to be constructed from the flightpath. This combined with oblique imagery from the same flight opens up the prospect of texture mapped models of small areas.

The movie below shows the Microdrone in action:

The clip is slightly creepy to be honest with the unit peering into windows and spying on women on beach towels – the Microdrone also resembles the surveillance units in Half Life 2 featured in our movie below on the Architecture of City 17:


City 17 Architecture from digitalurban on Vimeo.

Bringing it back to geography and urban models, the movies would also be of use for camera matching allowing a local context for 3D models. In short we want one – sadly we cant afford a unit with prices coming in at 25,000 Euro.

You can buy one and find out more details from OrbitGIS.

Top 10 Best Planning, Design and Development Sites

By Awards

Planetizen has just published its annual list of the 10 best planning, design, and development websites. Representing some of the top online resources for those interested in planning, design, and development we are humbled to find ourselves included.

Planetizen kindly state that:

Digital Urban offers an in-depth and advanced examination of the technologies and advancements in the field of city visualization. Focusing on digital media as an avenue for documenting city change and development, Digital Urban is keeping the pulse of a rapidly advancing segment of the study of cities. Written by Dr. Andrew Hudson-Smith of the Centre for Advanced Spatial Analysis at University College London, this blog is the most up-to-date look at the process of mapping, visualizing, and engaging with physical spaces in the digital world.’

We know its a slightly ‘pat on the back’ type of post but hey we don’t do this kind of thing very often and sometimes its such lists that make the time put into the blog worth while.

Right back to work, at the moment we are looking into crowd based modeling for populating the streets and simulating movement in 3D, as soon as we have something it will be in a post.

See the full Top Ten list over at Planetizen.

Top 10 Best Planning, Design and Development Sites

By Awards

Planetizen has just published its annual list of the 10 best planning, design, and development websites. Representing some of the top online resources for those interested in planning, design, and development we are humbled to find ourselves included.

Planetizen kindly state that:

Digital Urban offers an in-depth and advanced examination of the technologies and advancements in the field of city visualization. Focusing on digital media as an avenue for documenting city change and development, Digital Urban is keeping the pulse of a rapidly advancing segment of the study of cities. Written by Dr. Andrew Hudson-Smith of the Centre for Advanced Spatial Analysis at University College London, this blog is the most up-to-date look at the process of mapping, visualizing, and engaging with physical spaces in the digital world.’

We know its a slightly ‘pat on the back’ type of post but hey we don’t do this kind of thing very often and sometimes its such lists that make the time put into the blog worth while.

Right back to work, at the moment we are looking into crowd based modeling for populating the streets and simulating movement in 3D, as soon as we have something it will be in a post.

See the full Top Ten list over at Planetizen.

Virtual Philadelphia

By Geosim, virtual philadelphia, virtual worlds

In the movie below CBS3 reports on Virtual Philadelphia, the first 3D virtual city to offer high resolution at street level. A specialised vehicle was used to capture fine details, such as store fronts and street signs. Users can freely walk down (or fly through) an exact replica of every street in Center City Philadelphia.


Virtual Philadelphia on CBS3 from Steve Jarvey on Vimeo.

Created by GeoSim the geodetic foundation for the city models is based on 3D-polylines derived from 1:6000 scale aerial photography stereo-pairs.

The high-precision photogrammetry measurements (10-15cm) are used to generate accurate, GIS-standard compliant 3D-models that can be used in a variety of engineering and scientific applications. The model is based on gigabytes of aerial photos, street images, laser scans and geodetic measurements of Philadelphia to build an accurate city model. The end result is a model capable of providing a simulation of the physical streets, buildings and urban landscape with the “look and feel” of a real city.

You can take Virtual Philly for a spin at http://www.geosimphilly.com/

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