Saturday, July 31, 2021

July skiing done at the last moment

 

This month's skiing - check. Falling & road rash - check. Edges didn't work so well on rock.

Not the best ski run, two feet vertical. But, real snow. And a turn, even if it was a failed one. Have to go by what you can actually get. Not so many options on July 31st. Maybe bigger slopes in August.




Why I need a lot of snow space in my car:

This article has also been published at TGR. Read the full Planetskier series at planetskier.net, or all blog articles from Blogspot or TGR. Photos, videos, and text (c) 2021 by Jari Arkko.

Saturday, July 10, 2021

First 3D modelling of Lummelunda Grottan

 

Earlier this week I visited the caver's camp in Lummelunda in Gotland. What a wonderful event, happy to be able to go there again! One of things I did was to see if I could build a 3D model of the cave using LiDAR in the newest iPhones. I was able to start the project at least, here are some early results of the 450 meters or so that I modelled. 

This is very, very early and unsatisfactory material in many ways. For starters, I covered only a part of the cave. And this tech is still very much at the bleeding edge. The most serious problem is that the app I am using kept crashing when processing texture data in big scans, and therefore only half of texture data of the model (surface photographic material) survived. In addition, the sensor had trouble registering water as a surface, and big parts of the cave are covered by water. Then there are countless artefacts and mistakes, missing surfaces, joins are not exact, sometimes a scan of a part ends up in a fake wall even there isn't one, complex parts are messy, etc.

Still, pretty interesting, and in many parts there's an amazing level of detail. I particularly love the ability to see the rock forms on the outside skin of the model. For me, this reveals more about the cave than I usually am able to see on the site itself.

I'm very happy that I was able to experiment with this!

Your browser may be able to rotate a model on your own screen, at least recent versions of Safari and Chrome should be able to do it. Try it for fun!

The non-textured version of the model can be also downloaded, if you want to play with yourself. The GLB version is here, Blender version here, and STL here.

The opening picture above is a detail of the model around the four-way intersection between the clay tunnel from the Sandbanken (lower left), crawling tunnel (upper left), tunnel to Sump 1 (right), and tunnel to Hästryggen (lower right). Note the Finska Gruvan, a tiny, newly found hole at the top of the picture. I did not go all the way in, as it typically has bad air. Also note the joins that you can see in the four-way intersection. For practical and software limit purposes the model is built of 20-50 meter parts which are then joined in postprocessing using Blender.

The below picture is what the insides of the model look like when the texture happens to be in place. Note that this is not a photo, it is a part of the model that I can rotate, fly through, etc. The location is standing at the Sandbanken, viewing away from the sandy beach and to the curving tunnel that leads towards Torget.


View of the entire modelled area:

This article has also been published at TGR. Read more urban exploration stories from theurbanexplorer.net, and other underground stories from planetcaver.net. Read the full Planetskier series at planetskier.net, or all blog articles from Blogspot or TGR. Photos and text (c) 2021 by Jari Arkko. All rights reserved.

Another two new lakes -swimming day

 

Yet another day with not just one but two new lakes to swim at!

And they were wonderful. Far into Kirkkonummi, these places are not so well known or popular, but of course with the heatwave there were quite many people. But both were stellar, both had ample green areas for playing and picniqueing, a very nice lake. The Karskog one actually also had a cliff area with a jumping tower as well.

Karskog: N 60.185359 E 24.263682

Storträsk: N 60.191487 E 24.339876


For more sauna and swimming stories, check out planetswimmer.com and saunablogger.cool websites! And of course the Planetcaver, and Planetskier blogs for other stories in Blogspot and TGR! The photos and text (c) 2021 by Jari Arkko. All rights reserved. I never take photos of other swimmers on a beach, and try to visit at times where there is simply no one else around.

Monday, June 21, 2021

Kattilajärvi cave walk with Jarmo

 

Last winter I explored the far reaches of the Kattilajärvi on snow shoes, and found several new small caves. But also ran out of time to explore them further, and the heavy snow cover didn't make it easy to explore the boulder caves. I wanted to return during the summer, and now Jarmo and I hiked around the Lippukallio are east of Kattilajärvi. And wow, many new small caves, and we realized one of the boulder caves I had seen in the winter was actually quite big. Three levels, complex maze, shaky moving boulders... nice!

Photos in this article are mostly Jarmo's -- it always wonderful to explore with him as the photos are much better than what I can take myself :-)

And as Jarmo pointed out, that big boulder cave may actually be Espoo's longest cave at around 22 m. There is one shelter cave that is longer (Myllyjärvi cave, 35m) and a couple that come close to the same length (Nepperi cave at 18m but much of that length is in its shelter cave part, and three other shelter caves in the 9-12 meter range in the Lippukallio and Kattilajärvi area).

Anyway, cave length is largely in the eyes of the map drawer, when it comes to shelter caves and boulder caves. Opinions about how the length should be measured vary. I have usually chosen to count the total length of all tunnels for boulder caves, and width for shelter caves. There may also be difference of opinion when a shelter caves can be called caves. I've chosen to report even small ones, and document their dimensions, rather than ponder too much about what is a proper cave.

The boulder cave was indeed found on my earlier exploration and I chose to call it not-so-imaginatively "Lippukallion lohkareluola 2". It is in coordinates N 60.303523 E 24.628776. There's a cave map and a rotatable 3D model (you can also download the model here).

But we also found seven new caves! They are:

Pictures, first from the big cave ("lohkareluola 2"):





The smaller boulder cave next to lohkareluola 2, called "lohkareluola 1":

Minilippaluolanen:

Halkeamakololuolanen:

Kiipeilyhalkeamaluola:


Lohkarehalkeamaluola:

Kallionsisuksen halkeamaluola:

Halkeaman päätykololuolanen:

Rapautumislippaluola:

Views:

This article has also been published at TGR. Read more urban exploration stories from theurbanexplorer.net, and other underground stories from planetcaver.net. Read the full Planetskier series at planetskier.net, or all blog articles from Blogspot or TGR. Photos and text (c) 2021 by Jarmo Ruuth and Jari Arkko. All rights reserved.

Long lake swim

 

First time swimming in Nuuksio's Pitkäjärvi (Nuuksio Long Lake)! There isn't really an official beach, but there is one semi-official, down from the Haltia nature center. 

It is here: N 60.292973 E 24.554634.


For more sauna and swimming stories, check out planetswimmer.com and saunablogger.cool websites! And of course the Planetcaver, and Planetskier blogs for other stories in Blogspot and TGR! The photos and text (c) 2021 by Jari Arkko. All rights reserved. I never take photos of other swimmers on a beach, and try to visit at times where there is simply no one else around.

Sunday, June 20, 2021

Lamminjärvi swim

 

Another new lake swim, this time in Veikkola, at the Lamminjärvi and the Lammaskallio beach. Very nice. And hottest day of the summer so far!

There's also a sauna that can be rented, with its own  pier.

For more sauna and swimming stories, check out planetswimmer.com and saunablogger.cool websites! And of course the Planetcaver, and Planetskier blogs for other stories in Blogspot and TGR! The photos and text (c) 2021 by Jari Arkko. All rights reserved. I never take photos of other swimmers on a beach, and try to visit at times where there is simply no one else around.

First swim of the season!

 

I've been lazy. Last year I swam every day during the summer, this year.... took to June 19 for the first swim!

But it was nice to again go to a new place. Or I've been to Vitträsk lake in Kirkkonummi, but I've not been to the Svartvik beach.

Nice, small beach. I really enjoyed getting to the water, despite having to enter a bit further away from the main beach and on the not so sandy lake bottom due to the crowds. But very nice, cool experience on a hot day!


For more sauna and swimming stories, check out planetswimmer.com and saunablogger.cool websites! And of course the Planetcaver, and Planetskier blogs for other stories in Blogspot and TGR! The photos and text (c) 2021 by Jari Arkko. All rights reserved. I never take photos of other swimmers on a beach, and try to visit at times where there is simply no one else around.