User:LA2

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Event Calendar edit
19th MarchRéunion du groupe local de LyonLyon, Auvergne-Rhône-Alpes, France
19th MarchSouth Bay Map NightSan Jose, California, United States
19th March173. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
19th MarchApéro OpenStreetMap StrasbourgStrasbourg, Grand Est, France
19th MarchOSM Edinburgh pub meetupCity of Edinburgh, Scotland, United Kingdom
20th March[Online] Map-py Wednesday
20th MarchMap-py Wednesday
20th March[Online] Map-py Wednesday
20th MarchMap-py Wednesday
20th MarchUN Mappers training – Validating OSM data – session #3
20th MarchStammtisch KarlsruheKarlsruhe, Baden-Württemberg, Germany
22nd March15. Mapathon & Mapping Party RapperswilRapperswil, Rapperswil-Jona, St. Gallen, Switzerland
22nd MarchFOSSGIS 2024 - OSM-Samstag/PreeventHamburg, Germany
23rd MarchFOSSGIS 2024 - OSM-SamstagHamburg, Germany
24th MarchOpen Knowledge Braga 2024Gualtar, Braga, Portugal
25th MarchTomTom 成大 OpenStreetMap WorkshopTainan, Taiwan
25th MarchBremer MappertreffenBremen, Free Hanseatic City of Bremen, Germany
26th MarchRencontre « OpenStreetMap et territoires »Grenoble, Auvergne-Rhône-Alpes, France
26th MarchOpenStreetMap-meetup in GentSint-Amandsberg, Ghent, East Flanders, Belgium
26th MarchRencontre Saint-Étienne et sud LoireSaint-Étienne, Auvergne-Rhône-Alpes, France
27th MarchiD Community Chat
28th March[Online] OpenStreetMap Foundation board of Directors - public videomeeting
28th MarchRadnetz Brandenburg Mapping Abend #4Potsdam, Brandenburg, Germany
29th MarchMapComplete Community Call
29th MarchMapathon with OpenStreetMap: Improving Athens County's Mapped Infrastructure @ Ohio UniversityAthens, Ohio, United States
29th MarchDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
1st AprilOpenStreetMap x Wikidata Taipei #63Huashan, Taipei, Taiwan
2nd AprilSouth Bay Map NightSan Jose, California, United States
4th AprilOSM-Stammtisch DresdenDresden, Saxony, Germany
9th AprilOSM Utah Monthly Map NightSalt Lake City, Utah, United States
9th AprilMünchner OSM-TreffenMunich, Bavaria, Germany
10th AprilOpenStreetMap Midwest MeetupOhio, United States
15th AprilMaptime Amsterdam - Spring Mapping!Amsterdam, North Holland, Netherlands
15th AprilOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
16th AprilSouth Bay Map NightSan Jose, California, United States
16th April174. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
17th April[Online] Map-py Wednesday
17th AprilOSM Ostwestfalen-LippeBielefeld, North Rhine-Westphalia, Germany
17th AprilStammtisch KarlsruheKarlsruhe, Baden-Württemberg, Germany
24th April71. Wiener OSM-StammtischVienna, Austria
24th AprilDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
25th April[Online] OpenStreetMap Foundation board of Directors - public videomeeting
29th–30th AprilState of the Map MadagascarFianarantsoa, Haute Matsiatra, Madagascar
2nd MayOSM-Stammtisch DresdenDresden, Saxony, Germany
3rd–5th MayFOSSGIS-OSM-Communitytreffen 2024 Nummer 20Essen, North Rhine-Westphalia, Germany
6th MayOpenStreetMap x Wikidata Taipei #64Huashan, Taipei, Taiwan
7th MayMissing Maps London Mapathon
8th MayMünchner OSM-TreffenMunich, Bavaria, Germany
8th MayOpenStreetMap Midwest MeetupOhio, United States
11th MayOpenStreetMap-Stammtisch MainzMainz, Rhineland-Palatinate, Germany
15th–19th MayState of the Map Croatia 2024City of Zagreb, Croatia
15th MayStammtisch KarlsruheKarlsruhe, Baden-Württemberg, Germany
16th May[Online] Map-py Wednesday
16th MayOSM Utah Monthly Map NightSalt Lake City, Utah, United States
16th MayOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
21st May175. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
29th MayDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
30th May[Online] OpenStreetMap Foundation board of Directors - public videomeeting
3rd JuneOpenStreetMap x Wikidata Taipei #65Huashan, Taipei, Taiwan
4th JuneMissing Maps London Mapathon
6th JuneOSM-Stammtisch DresdenDresden, Saxony, Germany
11th JuneOSM Utah Monthly Map NightSalt Lake City, Utah, United States
12th JuneOpenStreetMap Midwest MeetupOhio, United States
13th JuneMünchner OSM-TreffenMunich, Bavaria, Germany
16th JuneOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
18th June176. OSM-Stammtisch Bonn (Juni 2024: 20 Jahre OSM - 15 Jahre Stammtisch Bonn)Bonn, North Rhine-Westphalia, Germany
19th JuneStammtisch KarlsruheKarlsruhe, Baden-Württemberg, Germany
19th June13. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
27th June[Online] OpenStreetMap Foundation board of Directors - public videomeeting
28th JuneDüsseldorfer OpenStreetMap-Treffen (online)Dusseldorf, North Rhine-Westphalia, Germany
1st–7th JulyFOSS4G Europe 2024Tartu, Estonia
1st–7th JulyFOSS4G Europe 2024Tartu, Estonia
2nd JulyMissing Maps London Mapathon
8th JulyOpenStreetMap x Wikidata Taipei #66Huashan, Taipei, Taiwan
9th JulyMünchner OSM-TreffenMunich, Bavaria, Germany
10th JulyOpenStreetMap Midwest MeetupOhio, United States
16th July177. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
17th JulyOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
18th–21st JulyState of the Map Europe 2024Łódź, Łódzkie Voivodship, Poland
25th July72. Wiener OSM-StammtischVienna, Austria
1st–3rd AugustState of the Map CongoKintélé, Brazzaville, Congo-Brazzaville
5th AugustOpenStreetMap x Wikidata Taipei #67Huashan, Taipei, Taiwan
6th AugustMissing Maps London Mapathon
14th AugustMünchner OSM-TreffenMunich, Bavaria, Germany
14th AugustOpenStreetMap Midwest MeetupOhio, United States
17th AugustOSM-Stammtisch HannoverHanover, Lower Saxony, Germany
20th August178. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
3rd SeptemberMissing Maps London Mapathon
6th–8th SeptemberState of the Map 2024Nairobi, Nairobi County, Kenya
9th SeptemberOpenStreetMap x Wikidata Taipei #68Huashan, Taipei, Taiwan
11th September14. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
11th SeptemberOpenStreetMap Midwest MeetupOhio, United States
12th SeptemberMünchner OSM-TreffenMunich, Bavaria, Germany
17th September179. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
1st OctoberMissing Maps London Mapathon
7th OctoberOpenStreetMap x Wikidata Taipei #69Huashan, Taipei, Taiwan
8th OctoberMünchner OSM-TreffenMunich, Bavaria, Germany
9th OctoberOpenStreetMap Midwest MeetupOhio, United States
15th October180. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
30th October73. Wiener OSM-StammtischVienna, Austria
5th NovemberMissing Maps London Mapathon
11th NovemberOpenStreetMap x Wikidata Taipei #70Huashan, Taipei, Taiwan
13th NovemberOpenStreetMap Midwest MeetupOhio, United States
13th NovemberMünchner OSM-TreffenMunich, Bavaria, Germany
19th November181. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
3rd DecemberMissing Maps London Mapathon
9th DecemberOpenStreetMap x Wikidata Taipei #71Huashan, Taipei, Taiwan
11th DecemberOpenStreetMap Midwest MeetupOhio, United States
12th DecemberMünchner OSM-TreffenMunich, Bavaria, Germany
17th December182. OSM-Stammtisch BonnBonn, North Rhine-Westphalia, Germany
18th December15. Österreichischer OSM-Stammtisch (online)Stainach-Pürgg, Styria, Austria
8th JanuaryOpenStreetMap Midwest MeetupOhio, United States
14th JanuaryMünchner OSM-TreffenMunich, Bavaria, Germany

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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