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Posts Tagged ‘Pictometry’

How GIS Departments Can Change a Worldview

Monday, June 12th, 2017

When it comes to aerial imagery, government GIS departments tend to take a top-down approach. In other words, orthogonal imagery fits the bill when they view their town, city, or county.

While orthogonal imagery is a vital resource for all types of departments, oblique imagery is also beneficial. Oblique aerial images, which are captured from a 40- to 45-degree angle, make object recognition easier, especially when that object can also be viewed from all four cardinal directions.

Take this overhead shot of a building. It may look like an ordinary building. However, it’s difficult to tell what those arches are over the top.

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Near Infrared: More Than Meets the Eye

Tuesday, February 14th, 2017

Aerial imagery provides GIS managers and other professionals with a realistic bird’s eye view of a region, but it can’t always tell the full story. While an aerial image may present a realistic representation of the Earth, it can’t always portray things like elevation data accurately. Looking at LiDAR data, which uses laser technology, is one way to obtain information about terrain and land cover, but there are other ways to gain information about the land around us and classify the surfaces, vegetation, and other details on the ground.

 

The human eye can only see visible light in the electromagnetic spectrum. This is because the receptors, or cones, in our eyes can see colors in the red, green, and blue spectrums. However, there are ways for humans to “see” what we can’t – things like ultraviolet (UV) rays, X-rays, Gamma Rays, infrared, microwaves, and radio waves.

When it comes to the infrared spectrum, just outside of visible light, multispectral cameras capture what the human eye can’t see. These cameras capture Near Infrared (NIR) frequencies in order to classify the vegetation, impervious surfaces, and other features present in the photographs.

Near Infrared serves a number of purposes; namely, as aerial images, they allow for visual identification of vegetation presence and health. GIS, agriculture, and local government agencies rely on NIR to detect vegetation, impervious surfaces, pollution, and other features.

Why do GIS managers and other government agencies need a Near Infrared view? See the rest on the EagleView blog.

Aerial Imagery from Far and Wide: A Story Map

Wednesday, December 21st, 2016

Esri Map small

Each month at EagleView®, we share an image from our annual Pictometry® calendar on our blog. For the 2016 calendar, we selected 12 of our favorite aerial images out of more than 28 million captured in the 2014-2015 season.

Our 2016 calendar displays the diverse terrain found all across North America: deserts and mountains, canals and lakes, farmlands and cityscapes, islands and ocean bays.

Seeing one aerial photograph per month is one way to experience the spectacular Pictometry imagery we capture. But it doesn’t quite show just how far we travel to bring our customers industry-leading imagery and data.

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Navigating Emergencies, Preventing Tragedies: Indoor Mapping for Public Safety

Tuesday, November 29th, 2016

What had begun as a typical spring Tuesday had, by early afternoon, turned into a tragedy at Columbine High School on April 20, 1999. That day, two Colorado teens killed 13 people and injured 24 more in a school shooting that would forever change the face of emergency planning and response.

The event left communities around the United States grappling with just how unprepared they were to respond to or even prevent such tragedies. Since then, it has shaped emergency response tactics for law enforcement but not without first exposing the vulnerabilities of schools and other public buildings in America.

In recent years, geospatial technology has led the way in solutions for emergency planning, prevention, response, and recovery. Yet public safety personnel need a view beyond a building exterior. What these violent events have shown, time and time again, is that a view inside a building is just as critical in a life or death scenario.
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