Sign In:

×

Last Step!

Please enter your public display name and a secure password.

Plan to post in the forums? Change your default forum handle here!

×
×

CAVE SURVEYING

We often have just coordinates. While Finnish caves are small, they are often also non-obvious, mere collections of holes under boulders. Would be nice to have a map, to even know if we're in the right hole.

Enter the cave surveying course by the Finnish Caving Association.


Last weekend Janne and I joined a group of other enthusiasts on Luolaseura's course, with Johannes Lundberg from the Swedish Caving Association instructing us. The course started with an introduction to cave surveying and drawing maps, then we went to Lohja's Torhola cave.

We used old-school measuring tape, compass, and inclinometers, but also state of the art laser measurement tools with community-providedextensions. Quite some extensions, in fact, such as installing new motherboards and adding compasses, making the device more suited to caving.

We learned the basics of surveying a cave, measuring its size, position, form, and features. We also learned how to draw maps. This is very difficult! I ended up making a few different ones, the vertical maps being perhaps the easiest to make. Below you'll find one example, inspired by the various different parts of the cave -- such as one with the tourists or the one where the local youngsters organised a party at 3AM, waking up one of the participants who was sleeping in a tent nearby.

Overall, a very useful course! We also identified a need to develop survey and map techniques for the boulder caves. These types of caves are rare, mostly appearing just in the nordic countries. There seems to be no easy way to draw understandable maps of these caves, and all cave surveying experience has been focused karst caves that typically have a more well-defined form.

I was also surprised to learn that there is no good home in the Internet for cave maps. This seems like an obviously useful thing to have, hopefully that could be started by somebody.

It was also fun to see how natural Janne is at caving. At age 13, he is obviously still not as big as us grownups, so he can enter places we cannot. But he also seems to have a natural ability to twist himself in the right way to fit into tight places. This was useful when we tried to explore the lower "exit" of the Torhola cave. The exit is blocked by a stone, but you can enter a small tunnel leading to the stone, and at least be able to talk to the other cavers inside the bottom of the cave's "basement" part.

Many thanks to the active caving society, the course participants and Johannes!







Photos and videos (c) Jari Arkko and Janne Arkko. This blog is also available at Blogspot. Tämä blogi löytyy myös suomeksi Relaasta.

Play
READ THE STORY
The North Face Unveils ‘PERSPECTIVES’, A Film Series Exploring Change
Up Next Adventure

The North Face Unveils ‘PERSPECTIVES’, A Film Series Exploring Change

The North Face Unveils ‘PERSPECTIVES’, A Film Series Exploring Change

Change is a constant of life. We can’t control change, but we have autonomy over how we react to it. For folks who thrive in the outdoors, this rings especially true. We’re constantly at the mercy of Mother Nature, coping with changing elements, seasons, conditions, or goals. For someone like filmmaker Renan Ozturk, his life was always dictated by climbing. It was his compass, guiding him from one grand adventure to the next. But Ozturk wouldn’t be the filmmaker he is today had he never

Play
READ THE STORY
Viridiana Álvarez Is Breaking Barriers in the Mountaineering World
Up Next Adventure

Viridiana Álvarez Is Breaking Barriers in the Mountaineering World

Viridiana Álvarez Is Breaking Barriers in the Mountaineering World

Simply summiting Everest, K2, or Kangchenjunga is a remarkable accomplishment in its own right. Last year, Viridiana Álvarez did all three in one year and 364 days, making her the fastest woman ever to do so. And while the world record is a nice reward, the mountaineer from Mexico simply hopes that her adventures will inspire other Latinx women to dream big and carve their path in the outdoors. Her next big goal is to climb the 14 biggest mountains globally, and she’s already crossed five off

Play
READ THE STORY
Video: Setting the Female FKT On Mt. Rainier’s Wonderland Trail in Under 19 Hrs
Up Next Adventure

Video: Setting the Female FKT On Mt. Rainier’s Wonderland Trail in Under 19 Hrs

Video: Setting the Female FKT On Mt. Rainier’s Wonderland Trail in Under 19 Hrs

94 miles + 24,000 feet of climbing all the way around Washington’s Mt. Rainier. How long do you think that would take you? 10 days to enjoy it and take in the vistas? Sounds about right. Well, how about 19 hours? That’s all it took The North Face Team athlete and trail runner Kaytlyn Gerbin’s to set a new female FKT on one of the most grueling courses in the country. is a trip deep into the pain cave with Gerbin and her support team as she runs a record pace on the Wonderland Trail: 18h 41m