Dave MacLean

@daveatcogs

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:

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Dave MacLean@daveatcogs· 8d

Quote-post @huubeggen.bsky.social: lovely👇choices for #NoctilucentCloud pics About 500 km NE & 900 km W of #Beijing on the interactive map bit.ly/ISS074, there are pins for Huub's post; they also have links to downloadable 24- & 50-mm high-res by astronaut #ChrisWilliams CC: @mohartl.bsky.social

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

Dave MacLean@daveatcogs· 22d

Very nice find - thanks for resharing Taizo’s tweet. FYI: there is a pin on the interactive map bit.ly/ISS074 for your post and it also has links back to Taizo & to you. The pin is where the ||+|| was at photo time, midway between Fukuoka and Hiroshima

Screenshot of the interactive map https://bit.ly/ISS074 displaying some of the pins that lead to social media related to Mission 74 to the International Space Station

Dave MacLean@daveatcogs· 23d

My morning coffee today …

“Commemorating the first Moon landing” coffee mug

Dave MacLean@daveatcogs· 25d

Here you go … from western Nova Scotia: blue sky via Bluesky

Dave MacLean@daveatcogs· Jul 13

Watching the #EsriUC2026 plenary via a virtual feed at an #EsriCanada watch party here in #Halifax with many-many geopeople. It’s great to chat about things and see the plenary. Also … I found a pic of me at the #EsriUC1994!

Esri UC 1994 street banner in Palm Springs. Me near centre of image

Dave MacLean@daveatcogs· Jun 22

Hhmm (again)… looks like the arrowhead might get reversed!

Grey paint over the mid-directed arrowhead!

Dave MacLean@daveatcogs· Jun 19

Hhmm … which takes precedence - the new painted arrow or the older sign?!?

Conflicting arrow direction and do not enter sign

Dave MacLean@daveatcogs· Jun 11

Quote-post @huubeggen.bsky.social: cloud-free👇central #Switzerland! At #Zürich on the interactive map bit.ly/ISS074, there is a green-glow pin for Huub's post; it also has link to the downloadable 800-mm high-res by astronaut #JackHathaway

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

Dave MacLean@daveatcogs· Jun 10

3/3 ... #Barcelona: and #ZoomWAYin for this third pic: 1120-mm taken 23 May 2026, by #ChrisWilliams. Original available via the westernmost of three east-west pins on bit.ly/ISS074. The centre pin hovers very near @barcelonacodeschool.com. More in alt.

Photographed from the International Space Station, on 23 May 2026 15:03:08 GMT, by Chris Williams, NASA Astronaut. 1120-mm, 1/1000-sec, ISO-1250, Nikon Z9

Dave MacLean@daveatcogs· Jun 10

2/n ... #Barcelona zooming in a bit for this second pic: 460-mm taken 27 May 2026, by #JackHathaway. Original available via one of 3 pins on bit.ly/ISS074, aligned east-west. Interestingly, these three pics were all taken in early afternoon. More in alt.

Photographed from the International Space Station, on 27 May 2026 13:29:08 GMT, by Jack Hathaway, NASA Astronaut. 460-mm, 1/500-sec, ISO-500, Nikon Z9

Dave MacLean@daveatcogs· Jun 10

Here is #Barcelona at three different zoom levels on three recent dates, photographed from the International Space Station. First up: 116-mm taken 28 May 2026, by #ChrisWilliams. Original available via one of 3 pins on bit.ly/ISS074, aligned east-west. More in alt. 1/n CC: @barcelonacodeschool.com

Photographed from the International Space Station, on 28 May 2026 12:40:21 GMT, by Chris Williams, NASA Astronaut. 116-mm, 1/500-sec, ISO-500, Nikon Z9

Dave MacLean@daveatcogs· May 20

Sorry to hear this, but encouraged that you two have such an important and strong bond. Something that might "be a part" of many a day - click on a few of the pins on this interactive map and enjoy the beauty of the #Earth as photographed by astronauts on the ||+|| bit.ly/HadfieldISSp...

screen shot of an interactive map for photographs of Earth taken by astronauts Col. Chris Hadfield and Thomas Marshburn during (or related to) ISS missions 34 and 35; representative pin and pop-up displayed

Dave MacLean@daveatcogs· May 13

“Spinning” display of LiDAR point cloud image around COGS. Displayed on a large monitor in one of our hallways.

Dave MacLean@daveatcogs· May 12

There is a clickable pin on the interactive map bit.ly/HadfieldISSp... for your tweet-with-podcast. Located near the #Portugal - #Spain border, it's where the ISS was when the photo was taken. The pin also has links to your informative podcast and to the downloadable 16-mm high-res original photo

Dave MacLean@daveatcogs· May 8

Great stuff! FYI: want to see (most) of his tweets from the ||+|| that featured pics of #Earth? Try this map bit.ly/HadfieldISSp... (best on a computer)

Sample screen displaying a portion of eastern Canada on an interactive map. A representative image related to one “pin” is at the bottom. Map contains photos of Earth taken primarily by Chris Hadfield and Thomas Marshburn during missions 34 & 35 to the International Space Station

Dave MacLean@daveatcogs· May 8

Some of the posters that we're sending to #GeoIgnite2026 - such a wonderful opportunity to showcase work by COGS students (soon to be grads)!

Posters created by students in various programs at the Centre of Geographic Sciences (NSCC-COGS). Image by Dave MacLean, 8 May 2026

Dave MacLean@daveatcogs· Apr 24

slight tangent: during his #YearInSpace, @stationcdrkelly.bsky.social had an #EarthArt series of 200+ tweets. They are mapped on the fifth (of 6) "tab" of www.arcgis.com/apps/instant...; many map-pins also have links to downloadable high-res

sample pic of the 200+ that Scott Kelly tweeted, from the International Space Station, along the theme of Earth Art, between Mar 2015 and Mar 2016

Dave MacLean@daveatcogs· Apr 22

For #EarthDay2026, try out the Your Name In Landsat from the good folks at NASA: science.nasa.gov/mission/land... Here's me!

DaveAtCOGS displayed on NASA's Landsat Your Name in Landsat

Dave MacLean@daveatcogs· Apr 22

More blue sky for blueskyers! (Thanks @edgeoerin.com for your post 👇)

The blue sky late this afternoon, for Bluskyers. iPhone 15 pic in the Annapolis Valley

Dave MacLean@daveatcogs· Apr 15

Quote-post @kennethfield.bsky.social: I’ll eat this later on Banana Day!

Dave MacLean@daveatcogs· Apr 7

Anyone want to see presently-on-his-way-back-from-the-Moon Reid Wiseman’s photos of Earth that he took during ||+|| missions 40 & 41, back in 2014? (Best on a computer) For a map, click isspix.com/issexp4041 (takes a min to load); then click his name at lower-left. Enjoy!

Sample photo by Reid Wiseman (accompanied with “Good morning from #space”) tweeted 4 Sep 2014 from the international space station

Dave MacLean@daveatcogs· Apr 4

Very interesting observations and analysis. On a slight tangent, here is an interactive map with "pictures taken (and shared on social media) by 14 female astronauts on the International Space Station" since 10 Nov 2014: arcg.is/1HmX0f . Adding new map-pins "~weekly"

Image of Christina Koch in the cupola of the International Space Station, taking photographs of Earth

One of several astronauts from ESA and NASA who have been in space and photographed Earth

Dave MacLean@daveatcogs· Apr 1

Quote-post @dutchspace.bsky.social: to commemorate the #ArtemisII launch event today, I’m drinking coffee from this commemorative mug from the first moon landing — July of 1969!

iPhone 15 photo of a July 1969, 1st Moon Landing coffee mug with Dutch Space’s bluesky post blurred in background

Dave MacLean@daveatcogs· Mar 27

Taken over 41 sec on 23 Mar 2026, here are photos of the rugged Algerian coast with 50-, 65-, 240-, & 340-mm focal lengths; camera setup by #JessicaMeir, #NASA astronaut. Original #NikonZ9, 1/500-sec images are downloadable via green-glow map-pins aligned east-to-west on bit.ly/ISS074. More in alt

Taken at 14:13:12 GMT on 23 Mar 2026, of the rugged Algerian coast. Specifics: 50-mm focal length; camera setup by Jessica Meir, NASA astronaut. Nikon Z9, 1/500-sec, f/20 image

Taken at 14:13:01 GMT on 23 Mar 2026, of the rugged Algerian coast. Specifics: 65-mm focal length; camera setup by Jessica Meir, NASA astronaut. Nikon Z9, 1/500-sec, f/16 image

Taken at 14:13:30 GMT on 23 Mar 2026, of the rugged Algerian coast. Specifics: 240-mm focal length; camera setup by Jessica Meir, NASA astronaut. Nikon Z9, 1/500-sec, f/16 image

Taken at 14:13:42 GMT on 23 Mar 2026, of the rugged Algerian coast. Specifics: 340-mm focal length; camera setup by Jessica Meir, NASA astronaut. Nikon Z9, 1/500-sec, f/18 image

Dave MacLean@daveatcogs· Mar 27

Quote-post @aretsch.bsky.social & @huubeggen.bsky.social: see their 👇thread for images of remnants of Iceberg A23a in the south #AtlanticOcean. FYI: there is a pair of green-glow pins on bit.ly/ISS074 for their posts, located NW of the Falklands Islands/Islas Malvinas. More in alt-text

Dave MacLean@daveatcogs· Mar 26

Some atlases displayed at #COGS from our library … each is intriguing!

Image of 14 different atlas displayed at the Centre of Geographic Sciences (iPhone 15 pic)

Dave MacLean@daveatcogs· Mar 20

Saw this cool photo of #CanadArm2 photobombing #ChrisWilliams' view over #GolfoSanJorge along #Argentina 's coast. Original 35-mm, #NikonZ9, 1/4000-sec photo is downloadable via the interactive map bit.ly/ISS074 with two pins: near photo centre & a little southeast (location of ISS at photo time)

A 35-mm, NikonZ9, 1/4000-sec photo with CanadArm2 over Golfo San Jorge along Argentina's coast. Photo by Chris Williams, NASA astronaut currently on the International Space Station

Dave MacLean@daveatcogs· Mar 17

Looking to see “The Emerald Isle” from space? Wander into pictures by Canadian astronaut @cmdr-hadfield.bsky.social and zoom in on Ireland via this interactive map bit.ly/HadfieldISSp... and click on various “C” pins! (More in alt-text). #HappyStPatricksDay

Map of pictures of Earth (specifically Ireland, today!) taken by Chris Hadfield from the International Space Station. Many pins also have links to the downloadable high-resolution original.

Dave MacLean@daveatcogs· Mar 12

and the Useless Loop - Carrarang region south of Dirk Hartog Island, taken 2 seconds after that. Original 200-mm high-res taken by #NASA astronaut #DonPettit available via a green pin on bit.ly/ISS074. 2/2

the region south of Dirk Hartog Island, taken 24 Dec 2024, 200-mm, Nikon Z9. Original 200-mm high-res, taken by NASA astronaut Don Pettit, is available via a green pin on the map https://bit.ly/ISS074

Dave MacLean@daveatcogs· Mar 12

Here's the same region from almost the same perspective, but taken ~20 years later (12 Nov 2004, 180-mm, Kodak DCS760c vs 24 Dec 2024, 200-mm, Nikon Z9), mainly Dirk Hartog Island. Original 200-mm high-res available via a green-glowing pin on the map bit.ly/ISS074 1/2