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Dave MacLean

@daveatcogs.bsky.social

GIS Faculty, Centre of Geographic Sciences (COGS); Fellow, Royal Canadian Geographical Society; co-Director, Esri Canada Centre of Excellence (COGS). My posts Just getting started on bluesky Astronaut photos-of-Earth maps: https://isspix.com/MapTourHowTo

1,620 Followers  |  439 Following  |  1,430 Posts  |  Joined: 10.02.2024
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Posts by Dave MacLean (@daveatcogs.bsky.social)

Wow - lots of #Sahara sand and dust!

06.03.2026 14:05 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Canadarm2 Grips Cargo Spacecraft, Spacewalk Prep and Biology Continue - NASA A JAXA (Japan Aerospace Exploration Agency) cargo spacecraft is in the grasp of the Canadarm2 robotic arm following its detachment from the International Space Station’s Harmony module on Thursday. Th...

Via #NASA - Canadarm2 Grips #JAXA's HTV-X1 Cargo Spacecraft, Spacewalk Prep and Biology Continue www.nasa.gov/blogs/spaces...

06.03.2026 01:55 β€” πŸ‘ 11    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
screen shot of an interactive map for photographs of Earth taken by astronauts during (or related to) ISS mission 74; representative pin (lower-right) and pop-up (left) displayed

screen shot of an interactive map for photographs of Earth taken by astronauts during (or related to) ISS mission 74; representative pin (lower-right) and pop-up (left) displayed

Nice article and image.

FYI - there is a pin on the interactive map bit.ly/ISS074 for your post. Located south of #CapeTown, the pin is at the location of the ISS at photo time and also has links to the #NASA article & the downloadable Apple iPad Pro original photo, taken by #JonnyKim

06.03.2026 14:03 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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πŸŒ„ Good morning, everyone! What is the best time to visit southern #Kazakhstan πŸ‡°πŸ‡Ώ ? It's the spring! 🌱 The time when the wild tulips are turning the steppe into a colourful green carpet. 🌷 Have a wonderful Friday! πŸ€—

#FloralFriday #FlowersOnFriday #Landscape #EastCoastKin #CentralAsia #Scape #Flowers

06.03.2026 10:32 β€” πŸ‘ 70    πŸ” 6    πŸ’¬ 0    πŸ“Œ 1

Me, too. I guess some β€œreader app for visually impaired” (that’s an awkward word) is required. Thanks for the chat on this!

05.03.2026 15:43 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Update on the "no alt-text and no tag" situation. (My following terminology might not be 100 %.) I understand that there are "reader-apps" that can display alt-text for Bluesky (and probably many other) social media posts for both images and videos. It'd be neat to see 1) a reader, & 2) the results

05.03.2026 15:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Maybe along the Ganges River?

05.03.2026 10:00 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Sorry about β€œno alt text”; I’m certain that I included it, but - as a video - I guess it got dropped:(

04.03.2026 23:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Who can identify the about 14 seconds of nearby birdsong?

Taken this morning in Bridgetown, NS, after last night’s few centimetres of snow. So far, the β€œfor rent” signs on these birdhouses haven’t worked! (iPhone video; more in alt-text)

04.03.2026 19:19 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 4    πŸ“Œ 0

I think we need a small pause...

03.03.2026 09:48 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

🧠 Today’s Trivia:
Which Canadian province has the longest coastline?
πŸ—ΊοΈ Bonus: Guess how many kilometres it stretches!

03.03.2026 00:20 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 4    πŸ“Œ 0
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πŸ”Š#FullMoon fly-by (99.3%) πŸŒ•
#WormMoon over the #SurreyHills
#CrustMoon #SoreEyesMoon #CrowComesBackMoon
@davidbflower.bsky.social
@stormhour.com
@metoffice.gov.uk
@thephotohour.bsky.social
#StormHour #loveukweather #getoutside
@British_Airways
BA426 LHR-LUX

03.03.2026 00:21 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

Very nice stitching by @huubeggen.bsky.social … results β€œcoming soon” to a map!

02.03.2026 23:00 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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A stitch of images ISS074-E-247230-247240 taken by Chris Williams.

02.03.2026 21:17 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1

Or even an edert button!

02.03.2026 22:56 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

2/2 another portion of #Halifax - #Dartmouth as photographed on 31 Jan 2026. Original 1600-mm (!) high-res by #NASA astronaut #ChrisWilliams is downloadable via map bit.ly/ISS074 (pin near that airport. The ISS was north of #Tatamagouche, NS, at photo time). Gap between pics: 3 sec. More in alt-text

02.03.2026 17:26 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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A rare close-up of a snow leopard in the wild

Original post

02.03.2026 13:06 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Maddox Cove, NL. January 2026. #photography #maddoxcove #newfoundland

01.03.2026 11:57 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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How and when to see the total lunar eclipse on March 3 | CBC News In the early morning hours of March 3, the moon will glide through Earth's shadow, producing a total lunar eclipse across Canada. But what you see depends on where you are.

Nice explanatory article on the upcoming 3 March lunar eclipse by #CBC’s @nebulousnikki.bsky.social: www.cbc.ca/news/science... For us in the #maritimes, the moon will have set before totality

28.02.2026 11:27 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Did you know that all of my older poetry books are going out of print? Everything left in stock is on sale for 50% off. This is your last chance to get one. When they're gone, it's for good! Every copy is signed, along with a short handwritten note. etsy.com/shop/SteveSkafte

28.02.2026 02:28 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
A portion of Halifax - Dartmouth as photographed on 31 January 2026 by NASA astronaut Chris Williams

A portion of Halifax - Dartmouth as photographed on 31 January 2026 by NASA astronaut Chris Williams

A portion of #Halifax - #Dartmouth as photographed on 31 January 2026. Original 1600-mm (!) high-res by #NASA astronaut #ChrisWilliams is downloadable via the map bit.ly/ISS074 (pin at Dartmouth, Nova Scotia. The ISS was very near #Charlottetown, PEI, at photo time). More in alt-text. 1/2

27.02.2026 21:32 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 1

Yes! Good to see this again - welcome back!

27.02.2026 13:47 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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N.S. book publishers slammed by provincial government's cuts to creative sector | CBC News A Nova Scotian book publisher says the provincial government's cuts to the arts and culture sector are "soul-crushing" when sales have already been decimated by uncertainty in the U.S. market.

Nova Scotia book publishers slammed by government's 'soul-crushing' cuts to arts sector
Budget eliminates $700,000 publishers assistance program
www.cbc.ca/news/canada/...
#DefendNSBooks @writersfedofns.bsky.social @afterwordsliterary.bsky.social @nimbuspub.bsky.social @pottersfieldpress.bsky.social

27.02.2026 12:50 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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Tehran has changed dramatically since 1979. This vintage satellite map highlights its rapid growth. The city remains central amid ongoing tensions between the U.S. and Iran: soaratlas.com/maps/140676

#Iran #Tehran #Nuclear

27.02.2026 09:11 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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On #InternationalPolarBearDay, we're highhlighting Hudson Bay, northern Ontario. Each winter, this sea ice is vital hunting ground for polar bears in & around Polar Bear Provincial Park. πŸ»β€β„οΈ

In a warming Arctic, ice forms later & melts earlier. @osi-saf.eumetsat.int tracks these changes.
πŸ“· Sentinel-3

27.02.2026 10:16 β€” πŸ‘ 8    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0

β€œDigressions” and β€œtangents” are a fun part of teaching :)

26.02.2026 21:15 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It took some sleuthing (thanks for "landing strip nearby" hint). I'm going with "the region 'NW' of McMurdo with Hell's Gate above centre, Zucchelli Airfield just off the top, & Qinling Station (operated by Chinese) on the prominent, arrow-tipped island upper-left of centre"

#WhereOnEarth is fun!

26.02.2026 14:39 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Quote-post @huubeggen.bsky.social: (Think #HueyLewis) πŸ‘‡ 🎢New York 🎷!

FYI - there is a pin on the interactive map bit.ly/ISS074 for Huub's post. Located at #GlenCove (lower-right of image), the pin also has link to the downloadable 200-mm high-res photo by #NASA astronaut #ChrisWilliams

26.02.2026 01:11 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Uh … β€œBeware the Eye-ds of March”?

25.02.2026 11:25 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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#nature #photography

Gribskov forest, Denmark

25.02.2026 08:46 β€” πŸ‘ 21    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0