Niels Elgaard Larsen's diary

Recent diary entries

You will not starve in Denmark

Posted by Niels Elgaard Larsen on 4 August 2016 in English (English)

The project to map OSM restaurants, cafes, and fast_food places to Danish health inspection reports is showing great results.

We now have ca 12000 food places with at health inspection id (fvst:navnelbnr) many of them added to OSM as part of the project.

Most of the food places are tagged with opening_hours, phone number, cuisine, webpage, etc.

ca 3500 food places are still missing:

The quality of the inspection reports are not as good as we had initially hoped

We have identified 437 food places with completely wrong coordinates:

Hopefully the health inspection authorities will fix this eventually.

Many of the inspections reports, even though they are tagged by the authorities as restaurants, and cafes, concerns retirement homes, schools, hotels, private companies, shelters, etc. This is not really a problem, it is an opportunity to add those to OSM too with the correct tag.

We are now starting to review food places that does not match inspection reports because they might be permanently closed.

In the future we can identify food places that no longer has an inspection ID, as these are most probable permanently closed or renamed with a new ID.


Location: Bramstrup, Musehuse, Freltofte, Faaborg-Midtfyn Municipality, Region of Southern Denmark, 5260, Denmark

Danish rowing clubs complete

Posted by Niels Elgaard Larsen on 22 December 2014 in English (English)

Now we have the Danish rowing clubs on OSM.

rowing clubs on overpass turbo

Most also have pontoons, websites, contact information etc.

This should make it easy to plan rowing trips, and to know where to put you boat when on the water.

rowclubs Denmark

Location: Indre Østerbro, Østerbro, Copenhagen, Copenhagen Municipality, Capital Region of Denmark, 2100, Denmark

Finally using GPS again

Posted by Niels Elgaard Larsen on 16 May 2011 in English (English)

After we got the the Fugro Aerial maps of Denmark we have been busy tracing roads.

I have focus on South/West Zealand and Island (postal codes that start with 4)

Fugro is great and we are making a lot of progress. 97 percent of addresses are covered in the 4xxx area. We know that because user Findvej have imported all addresses.

Fugro is from 2005 and the address data is current so we have spotted many addresses that does not correspond to houses or roads on the Fugro aierals.

Usually we make roads based on gussing and tag is a proposed with source=fantasy.

Yesterday i passed such a proposed road and I had my GPS logger on me:

There was only a few houses there, but all the roads were build. At the rest of the addresses just some poser and antenna cables were visible.

Unfortunately I missed the nearby Egehaven streets.

Much more Odsherred

Posted by Niels Elgaard Larsen on 3 February 2011 in English (English)

Now we have the Fugro maps. What a difference.

I have traced hundreds of roads in the last week.

The Fugro maps are very accurate. Others have found a few problems with the maps, but I have checked the maps againt a few areas that I have mapped many times with GPS with excellent receptions, e.g,
And my GPS agrees with Fugro.

It is a big help that we have all address positions on OSM in Denmark. In most cases it is possible to deduct the name of roads, although sometimes it is a puzzle. There are a few cases where precision could be better, e.g. when a road changes name somewhere.

The biggest problem is trees. Odsherred is cottage country and many roads are covered by trees. Sometimes you can still recognize the shape of the road from changes in texture of the trees. But many of the small roads between cottages becomes narrower and less well kept and more overgrown towards the end. So I just guess where the road actually ends.

Another "problem" is that the Fugro maps have boosted the activity in Denmark, which meant that i have experienced some edit conflicts. Now I upload more frequently.

The Fugro Maps are from 2005, A few places the address positions shows that roads must have been build after that. Some places you can see the construction of roads and house, so that you can still put the roads on OSM.

Location: Blålyngvej, Nygård, Odsherred Municipality, Region Zealand, 4500, Denmark


Posted by Niels Elgaard Larsen on 14 November 2010 in English (English)

Did some small roads and forest in Odsherred, Denmark
And the missing north part of the Odsherred railway.

I noticed the JeffH did the Høng-Tølløse railway today, I did Slagelse-Høng a few months ago.

I think the Danish railroad are very close to be complete. There is still missing a small section around Lemvig.


Posted by Niels Elgaard Larsen on 28 June 2010 in English (English)

Did some small roads in Odsherred and most of the paths and roads on Nekselø, Denmark.

The south end of the island is still missing. But Neksels is really great so I can recommond it to anyone with a GPS :-)

A few places I had to guess at the location of the official path when eg. crossing a hayfield.

Location: Møllegård, Kalundborg Municipality, Region Zealand, Denmark

FIk endelig lavet noget Vestsjælland

Posted by Niels Elgaard Larsen on 23 May 2010 in Danish (Dansk)

Omkring Høng, Slagelse og Hvalsø.

Kom forbi Marguerit ruten. Er den markeret på OSM og hvordan skal det gøres?


Posted by Niels Elgaard Larsen on 21 April 2010 in English (English)

added some miner roads around Ringsted, Denmark.


Posted by Niels Elgaard Larsen on 23 November 2009 in English (English)

Had a fun Sunday with family driving on unmapped territory in Odsherred.
Added small and residential roads in Højby, Tuse Næs, etc.

Location: Uglerupvej, Uglerup Huse, Holbæk Municipality, Region Zealand, 4300, Denmark

Rødby, Holbæk, and Stenløse

Posted by Niels Elgaard Larsen on 28 September 2009 in English (English)

I gave three talks on censorship and privacy to Danish schools.

I argued that user-generated content help protecting privacy.

And I mapped a few streets in the three cities. Especially Holbæk. Stenløse was already mappe well, so I just add a couple of sidestreets.


Posted by Niels Elgaard Larsen on 2 September 2009 in English (English)

I finally found a missing part of the bicycle path in Kruller-Muller park in the Nederlands.

It is not easy to find somethin to add in the Nederlands :-)

However the one-way streets in Schevenengen are messed up, but I did not have time to sort it out.

North Zealand

Posted by Niels Elgaard Larsen on 6 July 2009 in Danish (Dansk)

Did a few roads around Liseleje and Græsted

Hillerød Hundested

Posted by Niels Elgaard Larsen on 16 June 2009 in Danish (Dansk)

Added Hillerød to Hundested Train

Hundested to Hundested ferry missing.

Tried the last part of the Train to Nykøbing S, but the GPS did not work to well in the train.


Posted by Niels Elgaard Larsen on 23 May 2009 in English (English)

Did Gilbjergstien in Gilleleje and the railroad to Hillerød. Rail to Helsingør still missing. The rail to Hillerød cut through Ahornvæget. It down not look right, but I do not know what to change.

Wrote article in Prosabladet

Posted by Niels Elgaard Larsen on 1 October 2007 in English (English)