OpenGeofiction

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How big is the OGF data set?

Posted by Luciano on 2 January 2016 in Korean (한국어)

Earlier today we had some down-time... I'm not sure why but it seems to have recovered.

Since I had planned on working on OGF during that time, I started messing around with my most recent downloaded backup file (dated 12/31).

There are some interesting utilities that can be used to manage OSM data offline, in order to get manageable data sets in OSM format (or other formats). The two tools I use all the time are osmconvert and osmfilter.

OSM format files can be edited in JOSM and uploaded later, but these utilities have other abilities too.

Out of curiosity, today, I decided to get some statistics on our current OGF map, and make comparisons with my country, Ardisphere (abbreviated FA). I made two OSM files - one was for the entire OGF planet and the other was using my FA polygon file (.poly) which gives me a .osm file limited to my country's borders (roughly).

I found that the OGF planet file (uncompacted .osm) is currently about 4.05 GB, while the Ardisphere, alone, is 618MB.

"Wow," I thought. That looks like the Ardisphere, a relatively tiny country (about the size of Uruguay) on the world map, accounts for 15% of OGF's data volume. I guess I've drawn a lot of nodes! I'm nowhere close to finished, either.

As a point of comparison, OGF's entire Western Hemisphere, where only vandals and admins dare map, is approximately 65MB.

As another point of comparison, the REAL WORLD .osm file is 46 GB, so our imaginary world has less than 10% of the data. Meanwhile, Uruguay's .osm is 342MB, and Switzerland's is 3.6GB. Hmm. Ardisphere has twice the data as its real-world counterpart, while tinier but well-mapped Switzerland is almost the size of the entire OGF planet.

Both of the files I made, OGF.osm and FA.osm, are much too large to edit in JOSM - my desktop computer will crash on .osm files larger than about 100MB. I have other polygon files of smaller areas for if I'm making an extract for editing.

However, seeing those relative sizes, I was interested in compiling some statistics, using a feature of the osmfilter utility. Here is summary of the stats I found (cut off arbitrarily at ogf-counts > 10000) - screenshot from OpenOffice spreadsheet:

Imgur

Analysis and thoughts:

Most of these stats make sense to me.

I am not surprised to see that Ardisphere accounts for 75% of the world's "natural" keys - I have been working hard to completely cover the country with detailed landuse and land cover polygons, and to create a realistic hydrologic system.

My custom-made tag "ruta:survey" has become a place to record shorthand tags that I use with JOSM filters to control my edit space - when I complete an area I try to remove those. I was somewhat surprised to see that Ardisphere's 13000 "places" account for 25% of the world.

The very low proportion of highways in the country makes perfect sense - many mappers are road-crazy and neglect other features, under the mistaken belief that a road map is a complete map.

I was surprised by the low proportion of buildings, but it's true I haven't gotten down to mapping many individual neighborhoods, so far, while some other users have done quite a bit with this. I will note, however, that we have many cases where users have imported detailed information from OSM (despite policy against it) and much of that detail is dense with buildings. I have no idea what proportion of our map can be attributed to imported data.

Anyway happy new year! / ¡feliz nuevo año! / 새해 복 많이 받으세요!

and as always, happy mapping

Location: Calle Ficticia, Samosata, Comuna Vías, Boreal, 화구체연합

MundoMar mapping complete

Posted by Luciano on 24 November 2015 in Korean (한국어)

I'm really bad at finishing things. I tend to map an area up to a certain level and then move on to some other project. Thus there is very little that I consider "complete" in my countries.

I surprised myself over the weekend by completing a major theme park in Palmeras Grises, DS, Ardisphere, to a very high level of detail. It's sort of based on the US "Sea World" locations, but I made sure to make it different from those parks in layout and detail, too.

Anyway I'm quite pleased with it.

MundoMar!

Happy mapping.

Location: Barrio Coco Loco Norte, Palmeras Grises, Comuna Independencia, del Sur, 화구체연합

광명대학교 개교

Posted by youngjin1305 on 14 October 2015 in Korean (한국어)

2013년부터 착공되어 2년 3개월의 건설을 뒤로 한 채 광명대학교가 오늘(14) 일 완공되었다.

광명대학교는 차세대 미래인재형 대학교로, 국가의 전폭적인 지원을 받으며 령광군 내에 큰 이목을 끌었던 거대한 프로젝트였다.

이로인해 령광군은 작은 자동차 정비소 하나밖에 없던 마을에서 령광교육의 메카로 떠오를 조짐이다.

내년인 2016년부터 16학년도 신입생선발을 모집한다 현대 1차 수시 모집이 마감되었으며 경쟁률이 가장 높은 의예과는 5:1의 성적을 거두며 완공 이전부터 큰 성적을 내고 있던 것으로 알려졌다.

만약 계획에 차질이 없다면 오는 12월 교수아파트 3개동과 창립자인 현광 김낙도선생의 호를 딴 정경대학의 건물인 현광관을 새로 개장할 예정이다.

정찬민 교육부장관은 학교법인 의숙재단의 광명대학교 완공을 축하한다는 축사를 보내온 것으로 알려졌다.

이로써 학교법인 의숙재단은 영도대학교 본교와 영도대학교 퓨쳐캠퍼스, 그리고 광명대학교 총 3개교의 대학교를 가지고 있는 거대 재단이 되었다.

더욱이 창립자인 김낙도선생은 평소 바른교육을 이바지에 평생을 바쳐와 그 공로를 인정받아 1994년 정부로부터 2등급 훈장(정도교육장)에 추서되었으며, 이사회의를 통해 광명대학교 초대 총장에 취임한다는 소식도 들려와 학생들의 많은 기대를 사고 있다.

Consolidated Geolympiad Games Bid Process

Posted by Luciano on 16 August 2015 in Korean (한국어)

I have created a first draft consolidated Geolympiad Games Bid page.

Now anyone can bid for any given games, winter or summer, in one place. We can "close" bidding and voting after some minimum number of bids and/or votes are received. I am tentatively recommending 2 minimum bids, and 20 minimum votes total, or 10 minimum votes for a single city.

Feedback and comments are welcome - either down below or on the new page's Talk page. This is meant to be a community project, so other people's ideas are welcome.

I have created a link to a bid for Tarott, 2008 because joschi81 mentioned he intended to do this. I will probably have my city Villa Constitución do a bid for the 1970s - that seems to fit the developmental arc of the city.

Keep in mind as we develop bids that the games will "rotate" to different continents and regions (to prevent a single region monopolizing the games), so as the tables and bids get "filled in" other possibilities will be constrained. Think about this as you decide when you want to date your city's bid. For example, since Quentinsburgh, Tarephia, has won the 2016 bid, Tarephian cities should not bid for 2012 nor for 2020.

Mancomunidad de países castilohablantes

Posted by Luciano on 15 August 2015 in Korean (한국어)

Después de diálogo con usuario Kalh79, he decidido crear una organización internacional de países de habla "castellanesa" (o sea, española). Cualquier país esté bienvenido a este grupo - visite la nueva página e inscríbese sin perjuicio. Sé que hay muchos hispanohablantes en OGF - ¡trabajemos juntos!

After discussion with user Kalh79, I have decided to create an international organization of "Castellanese-speaking" countries (that is to say, Spanish-speaking). Any country is welcome to join - you can visit the new page and sign up freely. I know there are a lot of Spanish speakers in OGF - let's work together!

Happy mapping!

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