User:LA2

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Event Calendar edit
18th FebruaryOSM térképest 2025-02-18Budapest, Hungary
18th FebruaryMissing Maps London: (Online) Mid-Month Mapathon [eng]
18th FebruaryRéunion du groupe local de LyonLyon, Auvergne-Rhône-Alpes, France
18th FebruarySouth Bay Map NightSan Jose, California, United States
18th FebruaryRéunion Province de LuxembourgArlon, Luxembourg, Belgium
18th February185. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
18th FebruaryLüneburger MappertreffenLüneburg, Lower Saxony, Germany
19th February[Online] Map-py Wednesday
19th FebruaryOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
19th FebruaryStammtisch KarlsruheKarlsruhe, Baden-Württemberg, Germany
20th FebruaryA Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Maria Del Carmen Camarena, Eliud Ernandes, and Gustavo LarroyoGuadalajara, Jalisco, Mexico
20th FebruaryWebinar: Mapeo de caminos
21st FebruaryOSMF Engineering Working Group meeting
21st FebruaryA Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Zyanya Yax, and Chino OrtegaGuadalajara, Jalisco, Mexico
24th FebruaryRencontre Saint-Étienne et sud LoireSaint-Étienne, Auvergne-Rhône-Alpes, France
25th FebruaryEast Midlands pub meet-upDerby, England, United Kingdom
25th FebruaryIntroducción a OpenStreetMapGranada, Andalusia, Spain
25th FebruaryOSM-Verkehrswende #66Berlin, Germany
26th FebruaryMaptime Amsterdam: End of Winter Mapping PartyAmsterdam, North Holland, Netherlands
26th FebruaryDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
1st March2. Open Data Day in FlensburgFlensburg, Schleswig-Holstein, Germany
2nd March14th OSM Delhi Mapping Party (Online)Dwarka, Delhi, India
4th MarchMapRoulette online Community Meeting
4th MarchOSM Utah Monthly Map NightSalt Lake City, Utah, United States
4th MarchOSM Treffen SalzburgSalzburg, Salzburg, Austria
4th MarchOpenStreetMap meetup in BrusselsMolenbeek-Saint-Jean - Sint-Jans-Molenbeek, Belgium
4th MarchSouth Bay Map NightSan Jose, California, United States
4th MarchMissing Maps London: (Online) Mapathon [eng]
4th MarchOnline-Diskussion OSM-Förderprogramm des FOSSGIS e.V.
5th MarchStuttgarter OpenStreetMap-TreffenStuttgart, Baden-Württemberg, Germany
5th MarchiD Community Chat
5th MarchKvartální OSM pivoBrno, Southeast, Czechia
5th MarchOSM Indoor Meetup
5th MarchMissing Maps - DRK & MSF Online Mapathon [deutsch]
7th–9th MarchStarke Frauen, Brot und Rosen - Community-Hackday im JuNo in MoersMoers, North Rhine-Westphalia, Germany
9th March14th OSM Delhi Mapping PartyDwarka, Delhi, India
9th MarchOSMmapperCPHCopenhagen, Capital Region of Denmark, Denmark
10th MarchOpenStreetMap x Wikidata Taipei #74Chengnei, Taipei, Taiwan
11th MarchHamburger MappertreffenHamburg, Germany
13th MarchMünchner OSM-TreffenMunich, Bavaria, Germany
15th MarchJunta OSM Latam - Avances SotM Latam 2025 MedellínMedellín, Antioquia, Colombia
15th MarchCartopartie - Quartier du Pontiffroy MetzMetz, Grand Est, France
15th MarchLocal Chapters and Communities Congress 2025
17th MarchPanoramax monthly international meeting
18th MarchMissing Maps London: (Online) Mid-Month Mapathon [eng]
18th MarchRéunion du groupe local de LyonLyon, Auvergne-Rhône-Alpes, France
18th March186. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
18th MarchLüneburger MappertreffenLüneburg, Lower Saxony, Germany
19th March16. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
21st MarchDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
25th MarchEast Midlands pub meet-upDerby, England, United Kingdom
26th–29th MarchFOSSGIS-Konferenz 2025Münster, North Rhine-Westphalia, Germany
28th MarchMapathon @ UZH DSI 2025Zurich, Zurich, Switzerland
29th MarchFOSSGIS 2025 - OSM-SamstagMünster, North Rhine-Westphalia, Germany
31st March🍃 Green Open Data Day (ou Dia Verde dos Dados Abertos)
1st AprilOSM Treffen SalzburgSalzburg, Salzburg, Austria
6th April15th OSM Delhi Mapping Party (Online)Delhi, Delhi, India
8th AprilHamburger MappertreffenHamburg, Germany
8th AprilMünchner OSM-TreffenMunich, Bavaria, Germany
13th April15th OSM Delhi Mapping PartyDelhi, Delhi, India
14th AprilOpenStreetMap x Wikidata Taipei #75Chengnei, Taipei, Taiwan
15th AprilRéunion du groupe local de LyonLyon, Auvergne-Rhône-Alpes, France
15th April187. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
15th AprilLüneburger MappertreffenLüneburg, Lower Saxony, Germany
16th April74. Wiener OSM-StammtischVienna, Austria
22nd AprilEast Midlands pub meet-upDerby, England, United Kingdom
30th AprilDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
4th May16th OSM Delhi Mapping Party (Online)Delhi, India
6th MayOSM Treffen SalzburgSalzburg, Salzburg, Austria
11th May16th OSM Delhi Mapping PartyDelhi, India
12th MayOpenStreetMap x Wikidata Taipei #76Chengnei, Taipei, Taiwan
13th MayHamburger MappertreffenHamburg, Germany
14th MayMünchner OSM-TreffenMunich, Bavaria, Germany
16th–18th MayFOSSGIS-OSM-Communitytreffen im LinuxhotelEssen, North Rhine-Westphalia, Germany
20th MayRéunion du groupe local de LyonLyon, Auvergne-Rhône-Alpes, France
20th May188. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
20th MayLüneburger MappertreffenLüneburg, Lower Saxony, Germany
28th MayDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
3rd JuneOSM Treffen SalzburgSalzburg, Salzburg, Austria
9th JuneOpenStreetMap x Wikidata Taipei #77Chengnei, Taipei, Taiwan
12th June17. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
12th JuneMünchner OSM-TreffenMunich, Bavaria, Germany
17th June188. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
17th JuneLüneburger MappertreffenLüneburg, Lower Saxony, Germany
19th–21st JuneState of the Map USBoston, Massachusetts, United States
27th JuneDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
14th–20th JulyFOSS4G Europe 2025Mostar, Federation of Bosnia and Herzegovina, Bosnia and Herzegovina
14th JulyOpenStreetMap x Wikidata Taipei #78Chengnei, Taipei, Taiwan
15th JulyLüneburger MappertreffenLüneburg, Lower Saxony, Germany
24th July75. Wiener OSM-StammtischVienna, Austria
11th AugustOpenStreetMap x Wikidata Taipei #79Chengnei, Taipei, Taiwan
19th AugustLüneburger MappertreffenLüneburg, Lower Saxony, Germany
15th SeptemberOpenStreetMap x Wikidata Taipei #80Chengnei, Taipei, Taiwan
16th SeptemberLüneburger MappertreffenLüneburg, Lower Saxony, Germany
17th–18th SeptemberJornadas de SIG Libre / SOTM EspañaGirona, Catalonia, Spain
17th September18. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
3rd–5th OctoberState of the Map 2025Quezon City, Philippines
13th OctoberOpenStreetMap x Wikidata Taipei #81Chengnei, Taipei, Taiwan
21st OctoberLüneburger MappertreffenLüneburg, Lower Saxony, Germany
22nd October76. Wiener OSM-StammtischVienna, Austria
10th NovemberOpenStreetMap x Wikidata Taipei #82Chengnei, Taipei, Taiwan
18th NovemberLüneburger MappertreffenLüneburg, Lower Saxony, Germany
8th DecemberOpenStreetMap x Wikidata Taipei #83Chengnei, Taipei, Taiwan
16th DecemberLüneburger MappertreffenLüneburg, Lower Saxony, Germany
18th December19. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria

LA2 is the username for Lars Aronsson, Sweden [1]. The same name is used on Wikipedia, OpenTom and Twitter.

In February 2006, I posted a presentation of myself and my GIS perspective on the OSM-talk mailing list.

Links

Gazetteer

In 2005, before OpenStreetMap had a city name search function, I started a gazetteer (place name register) with links to the maps. This has now moved to a subpage of its own: /Gazetteer.

Diary

May 9, 2013: I'm now also user LA2 at Mapwarper.net.

July 12, 2012: During Wikimania 2012 in Washington DC, I learn about MapStory, a project for free historic maps and timeline data.

January 25-28, 2009: I map parks and public buildings in central Linköping: Trädgårdsföreningen, Länsstyrelsen, Slottsparken, Folkungaskolan, Lärarseminariet (Engelska skolan). Instantly updated Mapnik layer from Cloudmate.

December 9, 2008: Geonames country files. The Swedish file contains 97,974 lines, of which the first is headings. There are 71,412 unique coordinates. 51,964 coordinates occur only once, 14,424 occur twice, ...and one coordinate (60°33'00" N 15°08'00" E) occurs 15 times (the village Djurås and various spellings of Västerdalälven/Österdalälven). I'm trying to understand what accuracy the values have.

No. Field Means Values
1 RC Value "1" for 97967 records, "4" for 6 records.
2 UFI Numeric values that are almost unique.
3 UNI Similar to UFI.
4 LAT Latitude in decimal degrees
5 LONG Longitude in decimal degrees
6 DMS_LAT Latitude in degrees, minutes, seconds
7 DMS_LONG Longitude in degrees, minutes, seconds
8 MGRS Looks like "32VPJ5508196462".
9 JOG Looks like "NO33-04", 62 different values.
10 FC For fields 10, 11, see my diary for June 13, 2006. Field 10 has 8 different values: "P" for 31566 records (populated places), "H" for 23241 (hydrology: lakes, streams), "T" for 21655 (terrain: rocks, hills, mountains, ports, islands), "S" for 20692 (settlements: farms, houses, airfields), "A" for 652 (administrative units), "L" for 123 (land areas: regions, industrial zones), "V" for 41 (vegetation: heaths, forests), and "U" for 3 records.
11 DSG 123 different values, indicating the type of object. "PPL" (populated place) for 31214 records, "LK" (lake) for 12684, "FRM" for 10870, "FRMS" for 7076, "ISL" (island) for 6332, "HLL" (hill) for 6268, "STM" (stream) for 3399, etc.
12 PC Blank for 97427 records, "4" for 399 records, "3" for 118, "2" for 19, and "1" for 10 records.
13 CC1 Country Code 1 "SW" for all records.
14 ADM1 Administrative level 1 Evenly spread over 22 numeric values (län).
15 ADM2 Administrative level 2 Blank for all records.
16 POP Population Blank for all records.
17 ELEV Elevation Blank for all but 17 records.
18 CC2 Country code 2 Blank for 97,775 records, "SW" for 97, "NO" for 86, "FI" for 12 and "DA" for 3 records. Where this occurs, DSG is "LK" (lake) for 76 records, "MT" (mountain) for 59, "STM" (stream) for 32, "PK" (peak) for 6, CHNM for 6, "STRT" (strait?) for 4 records. These are apparently border objects such as FJD (fjord) Svinesund and STM (stream) Trysilelva.
19 NT Values "N" for 82869 records, "V" for 12377, "D" for 2726, "C" for 1.
20 LC Language code? Blank for all but 2 records, having values "swe" and "eng".
21 SHORT_FORM Blank for 97,645 records, values for 321 recods.
22 GENERIC Generic name 465 unique values, such as "berget", "åsen", "fjärden"
23 SORT_NAME Full name in upper case without diacritics 68,265 unique values
24 FULL_NAME Full printable name, including diacritics 69,948 unique values
25 FULL_NAME_ND Full name with no diacritics
26 MODIFY_DATE Date when the records was updated Format YYYY-MM-DD. Data have been modified at 91 different dates, ranging from 1994-01-14 to 2007-02-28.

Coordinates are given as decimal degrees (fields 4,5) and as degrees-minutes-seconds (field 6,7). For many records, seconds are set to zero (0), implying that the values have been rounded. Seconds 10, 20, 30, 40 and 50 are also more common than other values, indicating that another level of rounding has been used for some records.

Records Modified year Comment
72762 1994 Data from 1994-01-14 and 1994-05-04 all have seconds=0; more variations on 1994-09-20.
435 1995 Data from 1995-08-28 and 1995-09-29 all have seconds=0; more variations on 1995-10-13. Coordinates from 1995-11-17 have seconds in steps of 5.
2661 1996 Data from 1996-01-22 have seconds in steps of 5. 1996-02-12 all variations.
213 1997
4466 1998
1330 1999
535 2000
13894 2001
1026 2002
645 2003 Most data have seconds=0, with some exceptions on 2003-01-03.
6 2007 Data from 2007-02-28 have seconds=0.

On 1995-11-17, some 286 records were modified, having seconds in steps of 5. Their latitudes range from 59°10'10" to 59°18'05" and 1ongitudes from 18°19'05" to 18°46'20" with one trailing value at 18°59'55". This is a very narrow bounding box around Stockholm's southern archipelago (Ormö, Ingarö, Värmdö).

The 17 records that have elevation are not Sweden's 17 most important mountains, just some randomly picked hills:

MODIFY_DATE DSG DMS_LAT DMS_LONG ELEV FULL_NAME Comment
1997-09-22 MT 613900 164500 462 Blacksås
1997-09-22 MT 613900 164500 462 Blaxås Just an alternative spelling for the previous record.
1997-09-22 MT 624600 165300 372 Björnberget
1997-09-22 MT 625500 172700 458 Björnberget Another peak having the same name.
1998-03-27 HLL 654800 225700 106 Degerberget
1998-06-11 HLL 650700 212500 130 Kälen
1998-08-12 HLL 624400 180500 209 Hultomberg
1998-08-12 HLL 624400 180500 209 Hultomsberget Just an alternative spelling for the previous record.
1998-09-16 HLL 621759 172150 180 Nolbykullen A productive day when several records are updated, all in the neighborhood of Sundsvall.
1998-09-16 HLL 621844 171655 257 Midskogsberget
1998-09-16 HLL 622208 171914 241 Södra Stadsberget
1998-09-16 HLL 622356 171740 150 Norra Stadsberg
1998-09-16 HLL 622356 171740 150 Norra Stadsberget Alternative spelling
1998-09-16 HLL 623002 174914 76 Barsviksberget
1998-09-16 HLL 623047 174955 98 Vårdkasberget
1998-09-16 MLWND 623634 175700 175 Härnö Torn
1998-12-03 HLL 604500 162900 307 Kungsberget

April 9, 2008: In this week's planet.osm there are 180,049 occurrences of "FIXME" (down 5120 or -2.8 % since March 26), belonging to 160,017 ways, 19,336 nodes and 17 relations. The most common patterns are note="FIXME previously unwayed segment" (121,425 occurrences, down 8,681), FIXME="add the proper tags" (15,527, down 3), note="FIXME previously tagged segment" (9,521, down 2,822), and note="FIXME unreviewed oneway" (8944, down 277).

April 6, 2008: I have drawn some more roads to, from and in Halmstad, Tylösand, Laholm. I have also added lakes north of 57°N and east of 14°E, using the lake walker plugin to JOSM. Tiles@home works alright, but lowzoom is lagging far behind.

March 26, 2008: In this week's planet.osm there are 185,169 occurrences of "FIXME" (up 9,919 or +5.6 % since last week), belonging to 165,371 ways, 19,298 nodes and 9 relations. The most common patterns are note="FIXME previously unwayed segment" (130,106 occurrences, up 3,856), FIXME="add the proper tags" (15,530, unchanged), note="FIXME previously tagged segment" (12,343, down 588), and note="FIXME unreviewed oneway" (9,221, unchanged).

March 19, 2008: In this week's planet.osm there are 175,250 occurrences of "FIXME" (down 16,110 or -8.4 % since last week), belonging to 169,218 ways, 5,529 nodes and 9 relations. The most common patterns are note="FIXME previously unwayed segment" (126,250 occurrences, down 20,041), FIXME="add the proper tags" (15,530, all new), note="FIXME previously tagged segment" (10,722, down 2,209), and note="FIXME unreviewed oneway" (9,221, unchanged).

March 17, 2008: I draw the river Indalsälven from Storsjön (Östersund) to the coast, and various roads around Östersund, Lycksele and Burträsk.

March 12, 2008: In this week's planet.osm there are 191,360 occurrences of "FIXME" (down 8,256 or -4.1 % since last week), belonging to 185,827 ways, 5,044 nodes and 9 relations. The most common patterns are note="FIXME previously unwayed segment" (146,291 occurrences, down 7,995), note="FIXME previously tagged segment" (12931, down 704), and note="FIXME unreviewed oneway" (9221, unchanged).

I hand draw lake Bolmen near Ljungby and some other lakes near Värnamo in Småland, Sweden.

How to systematically clean up those FIXMEs. The Osmxapi page describes a most useful feature. Suppose we want to address ways tagged with a note="FIXME previously unwayed segment" within our home region, bounded by longitude 15-20° E and latitude 55-60° N. Here's what you can do:

 wget 'http://www.informationfreeway.org/api/0.5/way[bbox=15,55,20,60][note=FIXME previously unwayed segment]' -O mymap.osm
 java -jar josm-latest.jar mymap.osm

Now JOSM starts with a huge area containing all ways that are tagged like that. This area is too big for an OSM download, but you can zoom in on any cluster of ways and download full OSM data for that smaller area.


After lakes (light blue) were added, the OpenStreetMap of Växjö looks more complete. Roads no longer end in nowhere, but close to the lakeshore.

March 11, 2008: Drawing lakes and streams downstream from Växjö, Alvesta, Åsnen. When the map says "source=Landsat, WMS" that is not a seal of quality, but just as much a warning. I don't know how good these Landsat images are. What exactly is lake, land, reed and sailing harbours? Some day in the future I hope we get a better source for water.

March 9, 2008: I draw lakes and rivers by hand based on the Landsat images in JOSM: River Stångån from Vimmerby to Linköping and Roxen with the lakes Krön, Juttern, Åsnen, Stora Rängen, Ärlången; river Svartån from Svartå (Stora Björken) to Örebro and Hjälmaren; lake Hjälmaren; Täljeån, Kvismare kanal, Hjälmare kanal, Arbogaån, Eskilstunaån.

March 5, 2008: In this week's planet.osm there are 199,616 occurrences of "FIXME" (down 12,335 or -5.8 % since last week), belonging to 194,271 ways, 4,879 nodes and 9 relations. The most common patterns are note="FIXME previously unwayed segment" (154,286 occurrences, down 12,635), note="FIXME previously tagged segment" (13,635, down 236), and note="FIXME unreviewed oneway" (9221, unchanged).

March 2, 2008: Tagging roads in central Östergötland, drawing Svartån (Mjölby-Roxen), lake Sommen (2485 nodes).

March 1, 2008: Tagging E4 Gränna-Väderstad, Tåkern, roads south of Vadstena and west of Mjölby, streets in Mjölby, Ödeshög, Väderstad.

February 29, 2008: Adding tags to old roads (line segments added two years ago) in Aneby, Gränna, Tibro, Hjo, Skövde, Karlsborg, Askersund, Zinkgruvan, Godegård. A lot remains to be done.

February 27, 2008: In this week's planet.osm there are 211,951 occurrences of "FIXME", belonging to 206,486 ways, 5012 nodes and 9 relations. (Apparently some objects have multiple FIXMEs.) The most common patterns are note="FIXME previously unwayed segment" (166,291 occurrences), note="FIXME previously tagged segment" (13871), and note="FIXME unreviewed oneway" (9221). These numbers will be compared to those of the following week, because I'm removing FIXME tags from a lot of roads.

February 26-27, 2008: During a visit to Jönköping, I collect and upload tracks from parts of the town (Söder/Torpa, Södra infarten/Haga, Liljeholmen/Rosenlund) and start to draw streets. I also try to introduce OSM to some more people. Boivie helps out with street names. I add highway= tags to some old streets in Huskvarna, Aneby, Gränna that I mapped before attributes were introduced. There are many more such invisible streets in Nässjö, Eksjö and other cities.


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