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Stuff found in the forest during a short walk

Posted by ChristianA on 5 June 2017 in English (English)

Yesterday my brother came by for a visit. He wanted to go for a short walk in the forest. So we drove to a place that we had planned to check out for some time. According to some an old quarry map, there was supposed to be a quarry for black granite in a forest area. The exact location was quite uncertain, and it was not entirely clear if the thing existed at all.

So we parked the car were the road ended and started walking along an road created by forestry machinery. We searched but could not find any trace of any quarry. Finally we gave up, but on our way back to the car we decided to try another old forestry road. After a few hundred meters we spotted an bare rock surface that looked interesting. It did not have any quarry, but instead several cave entrances. The caves were quite small, but still! These caves did not exist in the swedish cave database, which made them a very nice find!

Caves!

Then we decided to walk a few hundred meters further, since my "slope map" showed that there could be something interesting nearby. Then we saw an old road that was constructed of "skrotsten" (discarded stones from quarries or mines)!

Old road in the forest

Then we saw a large pile of discarded stones. We had found the quarry! Continuing on through the trees that had grown on top of some of the stones, we found the actual quarry hole as well. Most of it is waterfilled. Unfortunately I did not bring my camera, since it was a spontaneous trip, so I could only use my cell phone.

Waterfilled quarry

The final interesting thing we found was the ruin (concrete foundations) of an old building, close to the quarry hole. What it's purpose had been, we could not figure out.

Ruin

All in all, we found several interesting things during our short walk. As a bonus we also saw a very beatiful fox, which was quick and shy for taking pictures of, however.

Location: Norrtorp, Kopparbo, Norrköping, Landskapet Östergötland, Östergötlands län, Götaland, Sweden

Ruins of another sawmill

Posted by ChristianA on 2 June 2017 in English (English)

So I found the ruins of another sawmill in a forest. OK I had known about it for some time, though I was not sure it was much left or not. On an old map from the 40s (Ekonomiska kartan) it was visible and on an orienteering map from the 80s it was marked as a ruin. So I figured there might be something interesting there.

Ekonomiska kartan

Orienteering map

On my last mtb tour I went to look for it. I started to look for the path that was supposed to be through the forest. This turned out to be a mistake. There were note many signs of any path and I more or less had to carry my bike through parts of the forest. When I reached the water I finally saw an old path. I started to cycle on it, but after perhaps 50 meters it disappered again. Then the terrain got worse; wet mud combined with high grass with old dead trees on the ground. I was about to give up several times but always thought that if I would have given up, the whole thing would be for nothing. So I kept going.

Finally the ground became smoother and I found myself on an old road of sorts. And after a few meters I saw a pile of old broken bricks. Then I saw concrete foundations sticking out among the trees; I had found it! There were not much apart from the concrete foundations. And since there were so many mosquitoes trying to feed on me I did not want to stay for too long. I wanted to search for any old railway tracks, but the high grass made that difficult.

Fancy looking ruins

I took a few pictures and tried to outline the concrete structure with my gps. Then I followed the nice and even road out from the forest. I plan to go back someday, during autumn when there is not so much grass and mosquitoes. Then I will use the road directly and save myself 20 minutes of bike carrying.

The final result

Location: Lövbråten, Lilla Lövhälla, Nyköping, Landskapet Södermanland, Södermanlands län, Svealand, Sweden

Two trips to ruins of an old sawmill

Posted by ChristianA on 4 May 2017 in English (English)

Last week I went twice to visit (and map!) the ruins of an old sawmill, called Älsebo såg in swedish. There were two POIs on openstreetmap, but I wanted to check it out to see if I could map some areas also, and perhaps roads as well.

The first time I was out biking and mapping in the forest. I knew from studying an old map that there was supposed to be an old disused road in the forest. These are among my favourite things to map and so I was very happy to find the road in the forest. Unfortunately there was a stream crossing the trail, and the bridge was more or less nonexistent:

Not the best bridge I've crossed

It was possible to cross but very difficult to also get my bike across at the same time. I considered throwing the bike, but since it is only two months old I'd rather get wet instead. But I managed to get across.

Anyhow eventuelly I arrived where the old sawmill was supposed to have been, and I immediately discovered both ruins and another old road in the forest. Älsebo såg

The ruins were pretty easy to find, though one side of the stream had many trees lying over the actual ruins. Älsebo såg

Close to the sawmill I also saw the ruins of what probably was an old residential building, probably related to the sawmill.

Älsebo såg

Since I was out biking and still hade a long way back home, I decided not to stay very long. Instead I went back two days later, bringing my kids along. They played in the stream while I went around and took pictures and GPS traces. The kids love this kind of places; they can play as much as they like and they can stay for a long time. I really enjoy combining hanging out with my kids in the forest and mapping.

Since the main sawmill buildings were inside the river canyon and had high buildings around them, the GPS traces were not very reliable, so it was quite difficult to trace the outline of the ruins, but I tried anyway.

I also followed another old road close to the sawmill; this had probably been used at the same time as the sawmill. It connected to both lake Ämten and the other old road I found earlier. All in all I am quite happy with the results, though there may still be more interesting things in the area to map.

Location: Askersund, Kvillinge församling, Norrköping, Landskapet Östergötland, Östergötlands län, Götaland, Sweden

Using DEM and slope data to find interesting mapping locations

Posted by ChristianA on 28 February 2017 in English (English)

I like mapping by going out in the field, especially in the forest. Finding new (for me) trails and roads is very fun.

For mapping in Sweden I often use an old (expired copyright) map called Ekonomiska Kartan, by adding is as a tile layer in JOSM. It has names for farms, hamlets, mountains, forests, lakes and so on, which is often hard to come by otherwise. However, since it is old many things have changed on this map. I use this map together with Mapbox satellite images in JOSM, which is more recent.

Sometimes it is hard to determine if an old road, or similar, still exists, bu purely looking at Ekonomiska Kartan and Mapbox satellite. Recently I made a tile layer (just for the area where I live) that consists of DEM from SRTM, together with slope data from the Swedish forestry administration (Skogsstyrelsen). While this data is "open data", it has a license that is incompatible (I think) with OSM. So I just use this tile layer to figure out where to go with my GPS to map in the field.

One such example is shown below. Ekonomiska kartan (the old map) Ekonomiska kartan show a road traversing the railroad track in the center of the picture.

DEM/slope

It is clear that some parts of the old road still remains. So I went there as part of a recent mapping/biking tour, and found a nice path on both sides of the railroad tracks.

And the final result is

Final map

Location: Grindstugan, Lilla Lövhälla, Nyköping, Landskapet Södermanland, Södermanlands län, Svealand, Sweden
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