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Matt Mullin

@matthewwmullin • 3,926 subscribers

Space Laser Engineer & Product Development Lead @NASA From Sandwich MA 🥪

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NASA can tell how much water there is below Earth’s surface by measuring tiny changes in gravity that alter the distance between two satellites… Sufficiently advanced technology is indistinguishable from magic!

NASA can tell how much water there is below Earth’s surface by measuring tiny changes in gravity that alter the distance between two satellites… Sufficiently advanced technology is indistinguishable from magic!

53,354 Aufrufe

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You can now explore the entire US with 1-meter 3D LiDAR data! I rebuilt my USGS elevation viewer so you can search any address, zoom all the way into the terrain, and slide between LiDAR and satellite imagery. The detail is incredible. You can pick out riverbeds, ridgelines, old roads, drainage patterns, and terrain completely hidden by trees. Try it here and export your own animated GIF: Happy exploring!

You can now explore the entire US with 1-meter 3D LiDAR data! I rebuilt my USGS elevation viewer so you can search any address, zoom all the way into the terrain, and slide between LiDAR and satellite imagery. The detail is incredible. You can pick out riverbeds, ridgelines, old roads, drainage patterns, and terrain completely hidden by trees. Try it here and export your own animated GIF: Happy exploring!

414,132 Aufrufe • vor 1 Monat

Just a friendly reminder that NASA is building a nuclear-powered drone and sending it to Saturn’s moon Titan to search for the building blocks of life. Honored to have helped build the laser that will zap Titan samples for analysis by the onboard mass spectrometer (called DraMS). The actual spacecraft, a rotorcraft the size of a car, is being built by the legendary team at Johns Hopkins APL. It launches on a Falcon Heavy in July 2028, beginning a billion-mile journey to the outer Solar System. Mission of a lifetime.

Just a friendly reminder that NASA is building a nuclear-powered drone and sending it to Saturn’s moon Titan to search for the building blocks of life. Honored to have helped build the laser that will zap Titan samples for analysis by the onboard mass spectrometer (called DraMS). The actual spacecraft, a rotorcraft the size of a car, is being built by the legendary team at Johns Hopkins APL. It launches on a Falcon Heavy in July 2028, beginning a billion-mile journey to the outer Solar System. Mission of a lifetime.

311,300 Aufrufe • vor 1 Monat

The US has incredible topography! USGS recently released 1 m LiDAR elevation data covering the entire country, and their “3D Elevation as Art” series shows just how detailed it is. I used Astra/Codex to build an app where you can slide between the LiDAR elevation maps and optical imagery for every state. It’s extremely satisfying watching mountain ranges, watersheds, riverbeds, and other terrain suddenly appear in the LiDAR data. Check it out here and let me know what your favorite results are:

The US has incredible topography! USGS recently released 1 m LiDAR elevation data covering the entire country, and their “3D Elevation as Art” series shows just how detailed it is. I used Astra/Codex to build an app where you can slide between the LiDAR elevation maps and optical imagery for every state. It’s extremely satisfying watching mountain ranges, watersheds, riverbeds, and other terrain suddenly appear in the LiDAR data. Check it out here and let me know what your favorite results are:

218,038 Aufrufe • vor 1 Monat

Friendly reminder that NASA has thousands of beautiful, publicly available 4K visualizations of science data, spacecraft, and missions located here:

Friendly reminder that NASA has thousands of beautiful, publicly available 4K visualizations of science data, spacecraft, and missions located here:

112,176 Aufrufe • vor 3 Monaten

The USGS LiDAR app just crossed 37,000 users in less than 1 month! Main takeaway: people love exploring the data, but it needs to be faster. The current version pulls from USGS as you move around the map. That keeps it cheap and gives national coverage, but speed depends on live requests + processing. So I built a new version that preprocesses LiDAR + aerial imagery into multi-resolution tiles. As you zoom in, it only loads the detail you need. The result is lightning fast... smooth flying, instant LiDAR/imagery comparison, and real-time elevation rescaling. The problem is storage. Massachusetts: ~100 GB, Colorado: ~1 TB, Entire US: 60+ terabytes. At full scale, hosting would cost $6k-12K/year. Also learned that 68% of users are on mobile, so a better mobile version is coming. Hope to have a faster version soon when I figure out how to pay for it! Happy exploring on the original app:

The USGS LiDAR app just crossed 37,000 users in less than 1 month! Main takeaway: people love exploring the data, but it needs to be faster. The current version pulls from USGS as you move around the map. That keeps it cheap and gives national coverage, but speed depends on live requests + processing. So I built a new version that preprocesses LiDAR + aerial imagery into multi-resolution tiles. As you zoom in, it only loads the detail you need. The result is lightning fast... smooth flying, instant LiDAR/imagery comparison, and real-time elevation rescaling. The problem is storage. Massachusetts: ~100 GB, Colorado: ~1 TB, Entire US: 60+ terabytes. At full scale, hosting would cost $6k-12K/year. Also learned that 68% of users are on mobile, so a better mobile version is coming. Hope to have a faster version soon when I figure out how to pay for it! Happy exploring on the original app:

11,975 Aufrufe • vor 1 Monat

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