Satellite & Aerial

ESA Releases Map of Arctic Sea Ice

ESA: Sea ice thickness in the Arctic ocean The European Space Agency has released a map of sea ice thickness in the Arctic based on observations by the CryoSat-2 satellite. “CryoSat measures the height of the sea ice above the water line, known as the freeboard, to calculate the thickness. The measurements used to generate this first map of the Arctic were from January and February 2011, as the ice approaches its annual maximum. The data are exceptionally detailed and considerably better than the mission’s specification. They even show lineations in the central Arctic that reflect the ice’s response to wind stress.” There’s also a map of Antarctic ice, but it’s preliminary.

Three Tropical Storms

Check out this image taken yesterday by Geostationary Operational Environmental Satellite GOES-13 of Hurricane Danielle (top), Hurricane Earl (lower left) and a developing tropical depression (now Tropical Storm Fiona). Here’s one from this morning, more up to date but…  •  Continue reading this entry.

Cities at Night

Earth Observatory’s Cities at Night features photography of the night side of the Earth taken by orbiting astronauts. “Astronauts circling the Earth have the wonderful vantage point of observing the nighttime Earth from 350-400 kilometers above the surface, taking…  •  Continue reading this entry.

2005 Global Land Survey

NASA’s Earth Observatory site has a feature article on the 2005 Global Land Survey, a collection of 9,500 Landsat images captured between 2004 and 2007: The images are detailed enough to make out features as small as 30 meters (about…  •  Continue reading this entry.

Mapping Ice Sheet Thinning

Maps compiled from data from NASA’s Ice, Cloud and Land Elevation Satellite (ICESat) reveal the extent of ice sheet thinning in Antarctica and Greenland. ICESat’s precise laser altimetry instrument, launched in 2003, has provided a high-density web of elevation…  •  Continue reading this entry.

True Orthophotography

Ryan has a couple of posts on the difference between orthophotography — geometrically corrected aerial photography — and “true” orthophotography; true orthophotos “add the dimension of correcting for the distortion of buildings. Or, simply stated, true orthophotos do not show…  •  Continue reading this entry.

Go Fly a Kite

Speaking of low-cost aerial photography, The Fiducial Mark links to a research paper on the use of kite-based aerial photography to produce high-resolution aerial imagery at a cost much lower than the usual method (which at that scale usually involves…  •  Continue reading this entry.

Growth in Las Vegas

NASA’s Earth Observatory provides Landsat 5 images of Las Vegas in five-year intervals from 1984 to 2009. The images show the city’s incredible rate of growth over that period. They also line up perfectly, so once again I’ve taken the…  •  Continue reading this entry.

Oblique vs. Top-Down Imagery

Ryan Strynatka compares oblique imagery to top-down imagery. In a nutshell, tall buildings. “One problem with nadir imagery is that it can be difficult to tell how tall buildings are, or gather any information about buildings (or anything other features…  •  Continue reading this entry.

The Eyes of the Division

A real find via Slashgeo: an internal document about the Imagery Interpretation Section (5 MB PDF) of the U.S. Army’s 24th Infantry Division, dating from 1963. The document’s purpose was to promote the Section’s work to unit commanders. It also…  •  Continue reading this entry.

Oceandots

Oceandots is a collection of NASA satellite and astronaut imagery of the world’s islands and atolls — and not just the tiny, isolated ones like Pitcairn, Clipperton or Tristan da Cunha, either, though they’re certainly well represented and are…  •  Continue reading this entry.

Thermal London

This is interesting: thermal images of London from space, from the air, and from a high vantage point. Part of a site dedicated to thermal imagery of London, but this page is what’s of interest to us. At right,…  •  Continue reading this entry.

Aerial Photography in 1936

The wonderful blog Modern Mechanix reprints another contemporary article about early aerial photography: “He Made Sky Mapping a Big Business” was first published in the May 1936 issue of the eponymous magazine. Previously: “Flying Cameras Map America for War”: Aerial…  •  Continue reading this entry.

Cities at Night

NASA’s Earth Observatory has a page of photos of cities at night taken from space; at right, Tokyo. “Astronauts circling the Earth have the wonderful vantage point of observing the nighttime Earth from 350-400 kilometers above the surface, taking…  •  Continue reading this entry.

Historic Aerial Photography

Historic Aerials “provides free online access to historic and current aerial photography. You can view aerial photography from the 1930s through today. Use our multi-year comparison tools to detect changes in property.” Covers a good chunk of the U.S., with…  •  Continue reading this entry.

Mary Meader

The New York Times: “Mary Meader, who as a spunky new bride in the 1930s took off on a 35,000-mile journey to advance geographic knowledge by making unprecedented aerial photographs of South America and Africa, died Sunday in Kalamazoo, Mich….  •  Continue reading this entry.

Mars HiRISE Images

If you also like satellite images of other planets, proceed immediately to the home page of the HiRISE camera on the Mars Reconnaissance Orbiter: “During its mission, HiRISE will collect thousands of images of the Martian surface, covering only…  •  Continue reading this entry.

Satellite Misconceptions

Chad tries to address the confusion about a series of high-resolution images appearing in Google Maps and Google Earth. It seems to me that there are two misconceptions: that they’re all satellite images, and that they are real-time (or…  •  Continue reading this entry.

Nikolas Schiller

Yesterday’s Washington Post had a major piece about Nikolas Schiller, who’s been doing artful things with aerial photography and doing his best to stay under the web’s collective radar. (Sorry.) Excerpts from the Post article: Schiller barely pauses on…  •  Continue reading this entry.

Landsat Image Mosaic of Antarctica

The Landsat Image Mosaic of Antarctica “combines nearly 1100 hand-selected Landsat satellite scenes that are being digitally woven together to create a single, seamless, cloud-free image of the Antarctic continent — the most detailed color representation of this vast…  •  Continue reading this entry.

Two More Blogs

Stefan has discovered two brand-spanking-new blogs that have started up this very month: the Google Earth Hacks blog accompanies the site of the same name; MapWrapper.com is a GIS blog with an interest in earth sciences and remote sensing. Previously:…  •  Continue reading this entry.

World Wind Update

Like ArcGIS Explorer (previously), NASA World Wind is another application to which I’ve been giving short shrift, a consequence of my Mac-only household. And the Java version that would run on Mac OS X and Linux that was scheduled…  •  Continue reading this entry.

Earth from Space

The Smithsonian’s Earth from Space is an online exhibition of satellite imagery; images include climate, geology and human activity. It’s also a physical exhibition, on a tour that began last month and continues until January 2010. Lesson plans are…  •  Continue reading this entry.

Virtual Earth 3D Roundup

Reactions to, and follow-up stories about, yesterday’s announcement of Microsoft’s Virtual Earth 3D thingy (previously): The AP story focuses on the Microsoft vs. Google implications of this release (via MapHist). In that vein, Frank Taylor at Google Earth Blog says,…  •  Continue reading this entry.

The Top-Down View

Between high-rise buildings and easily accessible satellite imagery, buildings’ roofs are getting a second look — not just by casual viewers dinking around with Google Earth, but by architects, the L.A. Times reports. Sometimes the impact of new mapping…  •  Continue reading this entry.

Virtual Earth 3D

CNet reports the launch of Virtual Earth 3D, a component of Live Search that integrates three-dimensional models of 15 U.S. cities (so far) into search results — a flyover/Flight Simulator view, I suppose. Comes with virtual billboards for advertising. Microsoft’s…  •  Continue reading this entry.

Twisty Table

Here’s something different. While at PopTech, Jason Kottke discovered the Twisty Table, which was developed as a way to navigate high-resolution satellite imagery. “When you spin the table, the map zooms in and out and tilting the table scrolls…  •  Continue reading this entry.

Earth Wallpapers

Earth Wallpapers is a collection of desktop backgrounds created from Google Maps satellite images. Each image comes in several sizes; the back end is powered by Flickr (the images are available through Flickr here). Copyright issues notwithstanding, these are…  •  Continue reading this entry.

Google Imagery Update

There are reports here and there that Google has updated its satellite imagery. The images are certainly loading differently for me: lower-resolution photos are being used at wider zoom levels, and they seem to be cached differently. More as more…  •  Continue reading this entry.

NAIP

The National Agricultural Imagery Program collects aerial photographs of farmers’ fields during the growing season. According to an NPR story, one of NAIP’s purposes is to check on what farmers are planting — to make sure that they qualify…  •  Continue reading this entry.

Map of Paved Surfaces

NASA’s Earth Observatory reports on a new satellite-imagery-based mapping — the example is of the Washington-Baltimore area — that shows how much “impervious surface” there is in the area: “These space-based maps of buildings and paved surfaces, such as…  •  Continue reading this entry.

ESA Earth Observation Images

The European Space Agency has released more than a thousand high-resolution satellite images, most of which were acquired by the Agency’s Earth Observation satellites. Here’s the site for the images; it’s searchable rather than browseable, unfortunately. Via Cartography and…  •  Continue reading this entry.

CloudSat

NASA’s new CloudSat satellite takes cross-section images of cloud interiors, allowing researchers to see cloud formations in 3D. The images are essentially transects rather than maps, but can supplement and inform weather-related satellite imagery the same way as ground…  •  Continue reading this entry.

Earthshots

Earthshots: Satellite Images of Environmental Change is a collection of Landsat images of certain locations from different years (usually from 1972 to 2000) that show the changes to agriculture, urbanization and other activities in Landsat’s false-colour imagery, from the Ogallala…  •  Continue reading this entry.

Views of the Earth

I love looking at the images on Views of the Earth: Artificial Images of Our Real Planet, where Christoph Hormann has taken satellite images and reprocessed them. The end results are astonishing: views from a height, on cloudless days, that…  •  Continue reading this entry.

Gateway to Astronaut Photography

The Gateway to Astronaut Photography is an enormous collection of photographs taken by astronauts over a period of decades. From the site: “Beginning with the Mercury missions in the early 1960s, astronauts have taken photographs of the Earth. Our database…  •  Continue reading this entry.

Olivio Barbieri’s Model World

Olivo Barbieri’s model world: “It’s often hard to convince people that Olivo Barbieri’s aerial photographs are real. They look uncannily like hyperdetailed models, absent the imperfections of reality. Streets are strangely clean, trees look plastic, and odd distortions of scale…  •  Continue reading this entry.

Virtual India

The first public build of Virtual India (the Microsoft Research project with imagery that satisfies Indian security concerns; see previous entry) is now online, according to the Virtual Earth blog. Four languages; street maps for Bangalore only; works in Firefox…  •  Continue reading this entry.

Utah Atlas of Panoramic Images

Dr. William Bowen writes to tell us about his project, the Utah Atlas of Panoramic Images: “This latest web publication includes 887 photorealistic mathematical simulations of Utah’s complex landscape.” He adds that “it is important to realize that the panoramas…  •  Continue reading this entry.

Landsat Roundup

Landsat data in MrSid format, from Landsats 4 and 5 in 1990 and Landsat 7 in 2000, from NASA’s Applied Sciences Directorate. Via All Things Geography. Meanwhile, Landsat 5 is apparently experiencing technical difficulties. Via Very Spatial….  •  Continue reading this entry.

Google and NASA

The big news this week for Google watchers this week is the announcement Wednesday of a memorandum of understanding between Google and NASA’s Ames Research Center. Press releases from ARC and Google; news coverage from the San Jose Mercury News…  •  Continue reading this entry.

Satellite Imagery Desktop Wallpaper

UCSB graduate student Jeff Hemphill’s home page has a marvellous collection of satellite and Landsat images as desktop wallpaper. They’re all in 1280×1024 resolution — too bad for those of us with widescreen monitors. Via both Very Spatial and MetaFilter….  •  Continue reading this entry.

Google Imagery Updates

While I wait for the long-promised Mac version of Google Earth (hint), I note with interest that both Google Earth and Google Maps got their satellite imagery updated (Google Earth Blog, Google Maps Mania). But a separate enhancement is even…  •  Continue reading this entry.

Alabama Maps

Alabama Maps is a big collection of maps from the University of Alabama’s Cartographic Research Laboratory, in three main sections: contemporary maps, which features maps generated by the laboratory; historical maps, a collection of digitized images of old maps (not…  •  Continue reading this entry.

Measuring Sunlight by Satellite

The European Space Agency’s ENVISOLAR project is mapping the amount of sunlight received around the globe. Solar radiation data is useful not only for solar energy generation, but also for agriculture, tourism, and even health care (rickets, skin cancer). Via…  •  Continue reading this entry.

Google Earth

Google Earth is out. Requires a fast Windows PC. Three subscription levels, the basic one free. More once I’ve had a chance to look through the site; post your take in the comments. Via Google Blog. See previous entries: Google…  •  Continue reading this entry.

MSN Virtual Earth

Microsoft’s response to Google Maps comes in the form of MSN Virtual Earth, which was announced yesterday at the D: All Things Digital conference and will debut for real some time this summer. The key feature is the service’s “oblique”…  •  Continue reading this entry.

World Sunlight Map

The World Sunlight Map is a neat trick: it shows which parts of the Earth are currently in daylight and which are in darkness. It’s a simulation that begins with composite images of the Earth by day (sans clouds) and…  •  Continue reading this entry.

More Satellite Imagery

A couple of satellite-imagery links from Plep; I don’t think I’ve seen these before. Satellite Images of Earth at Night, from the International Dark-Sky Association. Usually you see night maps of the entire planet (e.g. see previous entry: APOD: The…  •  Continue reading this entry.

SatBlog

SatBlog is a blog about satellite imagery; since its restart last August it’s been focusing mainly on the Middle East (especially Iraq) and on all those bloody hurricanes. A lot of news stories can be illuminated by satellite photography —…  •  Continue reading this entry.

La terre vue du ciel

La terre vue du ciel is a collection of aerial photography. The photos are uncaptioned and unattributed: you pretty much have to guess what they are, where they’re from and from what altitude they were taken. Via Making Light….  •  Continue reading this entry.

Window Seat

If you’re into maps, then you’re also probably the sort of person who, when flying, asks for a window seat and does nothing but stare out the window for the duration of the trip. Though I frequently ask for an…  •  Continue reading this entry.

Eurasian SRTM Data

SpaceDaily reports that NASA has released data covering Eurasia from the Shuttle Radar Topography Mission (SRTM). [T]he new digital elevation data set showcases some of Earth’s most diverse, mysterious and extreme topography. Much of it previously had been very poorly…  •  Continue reading this entry.