Mapping and Machines: Level up with AI

In a recent article, former Apple Maps designer Justin O’Beirne showed the stunning increase in coverage and detail of building outlines on Google Maps, thanks to using computer vision techniques. By extracting building outlines from satellite imagery together with place and business information from street view imagery, Google generated a new set of data on “areas of interest” to display on their maps—something that takes months of work for humans to do for just one city.

Computer vision helps us harness machines to understand the world. There are millions of details around us as we walk down a street, and a human is able to understand them fairly easily. For the buildings lining the street, we know how many levels they have and whether they’re businesses, residential buildings, schools etc. We also understand the vehicles and know what to expect from their behavior.

Teaching machines to “see” is no simple task. The computer interprets an image by assigning every pixel into a category—formally called semantic segmentation. Clusters of similarly labeled pixels form segments of the image, each representing a different real-world object or feature.

This is how a well-taught machine sees the street scene (different objects are color coded)

Once trained, the computer is able to process, and perhaps even more importantly, output this information immensely faster and on a larger scale than humans ever could.

While machines will be able to do the bulk of the work, they won’t be able to do it completely on their own. Humans are needed to supervise—first, to train the algorithms, then to check up on the results and step in to correct the toughest cases. This is what is meant by the Human in the Loop approach.

When it comes to mapping, to understand the contents of an image is just one half of the process. The other half is to figure out the geographic location of the objects detected. Again, the machine works this out similarly to a human.

As humans, we need stereo vision in order to understand an object’s position in space. Each of our eyes sees the same object from a slightly different angle; in other words, each eye captures a separate image where the same object is visible. That’s what we also need for computer vision: record the same object in at least two images in order to triangulate its position and reconstruct it in 3D space. The difference again is that a computer can do this so much faster and more accurate.

3D reconstruction of a street in Amsterdam based on street-level images

Imagery is collected not only by map companies but also cities, local governments, road authorities, individuals, and many more. Pooling them together and processing this with computer vision means that maps can get updated much faster than before, keeping up with the requirements of freshness, coverage, accuracy, and high level of detail. As my colleague Chris also recently discussed, machines won’t be the only source of geospatial data—but to let them do the heavy lifting is the only scalable way. Human labor will be much better used when invested into verifying and adjusting the details and training the machines.

Referring to O’Beirne once more, he makes a note that “It’s interesting to ponder what this means for Google’s competitors. It’s no longer enough to simply collect data. Now to compete with Google, you also have to process that data and make new features out of it.” And he raises the question of what this means for OpenStreetMap.

I’m convinced it means something amazing. Imagery processed with computer vision is already available to OpenStreetMappers. The gap between Google and OpenStreetMap is still fairly large but more and more company backers are putting resources into OpenStreetMap (for example Facebook and Mapillary). Combined with a motivated and hard-working community, there’s a good chance that they’ll be able to make maps that can shake today’s mapping giants.

Say thanks for this article (0)
South Sudan data package to support effective and equitable Covid vaccine delivery
Avatar for Jo Pratt
Jo Pratt 12.2.2021
Interested in the future of Geospatial? Join TECTERRA for a free panel with industry CEOs
Avatar for Jonathan Neufeld
Jonathan Neufeld 10.29.2021
Trends for 2022 in geospatial data – Ordnance Survey
Avatar for John Kimmance
John Kimmance 01.21.2022
Next article

The Quest for Insights: A Shift to Location Intelligence

The $5 billion dollar GIS and spatial analytics industry – expected to hit $10B by 2023 – has been dominated by legacy GIS tools and methods for years. As new types of streaming data from smartphones, sensors and connected cars continues to rise, the real-world application of location data has to evolve. The amount of data being generated – an estimated 2.5 quintillion bytes of data created every day – demands a more robust approach, including advanced analytics and machine learning to keep up with the always-on stream of information.

As new analytical methods and non-static data streams prompt a shift away from legacy GIS specialists towards a broader set of users and analytics, location data will become an increasingly pervasive factor in our everyday lives. This evolution will cause the use cases for location data to evolve as well. While location data was previously used exclusively by mapping experts and select government agencies, today location technology has applications across organizations and departments to make sense of more data and inform new kinds of business decisions.

The following trends underscore the need for a more accessible approach that LI brings to the table:

  1. Companies will start using data collected from cities, including fixtures like trash bins and traffic patterns, to plan their growth and market strategies: Public data from government/city sources will actually be used by private organizations to improve their own operations. The amount of public location data being generated will make IoT Hardware inseparable from the Location Intelligence software that makes it actionable.
  2. Marketing campaigns based on consumer proximity and daily habits will become standard practice: Data about where consumers eat, shop and socialize is increasing, and marketers will continue to lean on these insights to tailor data-driven advertisements based on real-time location. This will impact the look-and-feel of ads to draw attention and more accurately influence the consumers that are exposed to them based on personal preference and interest.
  3. Omnichannel will tell retailers how to optimize store locations: Omnichannel is in and here to stay. By 2021, e-commerce sales will have increased threefold to $4.5 trillion since 2014, but surprisingly, 90 percent of retail transactions still take place offline. As Retail Dive’s Consumer Survey reports, 62 percent of shoppers prefer to “kick the tires” with “To see, touch, feel and try out items” ranking as the top reason why consumers choose to shop in physical stores.

Retailers will start using customer and location data not just to plan the opening or closing of a store location, but to better understand exactly what role physical locations should play in the buyer’s journey. Some leading ecommerce brands are already creating micro stores to provide shoppers a place to try on online inventory or repurposing existing locations to serve as walk-in distribution centers for online purchases, providing the convenience of online shopping with the instant gratification of in-store pickup.

As an increasingly mobile and connected society, we generate a constant flow of data with a location component. By transitioning from GIS to location intelligence (LI), the ability to work with spatial data becomes more accessible to users of all levels and expertise, opening new doors and creating opportunities for organizations to work across data sets and gain insights never before available. Organizations may reimagine their entire business models to stay competitive, or cities evolve decade-old systems to better serve citizens. Already, consumers can see these insights creating subtle changes and improvements to the way they interact with brands, each other and their environments.

Read on