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Tag: satellite imagery

ice skating…

Navigating Pressure Ridges at Skilak Lake

5 Feb 2023
We caught a brief window of skating on Skilak Lake last week. The prominent hazards turned out to be pressure ridges—zones of cracked ice under compression. This post contains: The…
instruction…

Route-Planning with ESRI Worldview

14 May 202018 Jan 2021
Whenever possible, I do route planning with Google Earth. Google Earth's 3D imagery allows me to fine-tune a route and identify features I might otherwise miss in two dimensions. But…
satellite imagery…

Transferring Satellite Imagery to Gaia GPS

8 Feb 20203 Jun 2020
In November of 2019 Greg Mills and I pulled off an incredible trip. We flew to the Inupiaq village of Selawik, then ice skated 125 miles to Kotzebue. Our route…
satellite imagery…

Satellite Imagery: Active sensors (Sentinel-1)

5 Jan 20208 Feb 2020
Active sensor imagery, such as Synthetic Aperture Radar (SAR), provides recent images that can be extremely useful for remote trip planning. SAR imagery penetrates through clouds and does not require…
satellite imagery…

Satellite Imagery: Historic Sources (Google Earth, ESRI, etc.)

11 Mar 201927 Apr 2020
Google Earth Google Earth is the most mature interface for viewing historic ("best") satellite imagery, but there are a few other sources to consider. Check out my detailed page on…
satellite imagery…

Satellite Imagery: Passive Sensors (MODIS, Landsat, Sentinel-2)

11 Mar 20196 Jan 2020
Several public agencies collect daily/weekly passive sensor (sunlight, including visible-spectrum) imagery that can be very helpful for trip planning. These resources are particularly valuable in the fall and spring, when…
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