OpenHistoricalMap

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Mapping the Past with OpenHistoricalMap and JOSM

Posted by Abbe98 on 3 March 2015 in English (English)

JOSM gives you the power to do OpenHistoricalMap mapping offline, use custom filters, use custom base maps without tools like Map Warper and much more.

Mapping the Past with OpenHistoricalMap and JOSM

Location: Brandkärr, Nyköping, Nyköpings kommun, Södermanland County, Region Svealand, 61165, Sweden

ohm:hypothetical

Posted by Abbe98 on 7 January 2015 in English (English)

I could not find any used solution for marking up information as hypothetical so I did it in my own way.

For dates OHM seams to use start_date/end_date(that’s at least what I have been seeing).

So when I decided on how I would mark up hypothetical information I wanted to be flexible. I started with ohm:hypothetical, then follows the tag/key that’s hypothetical. for example a hypothetical start_date would look like: ohm:hypothetical:start_date=yes this would also allow the value to be no for none hypothetical information.

The reason not to use ohm:hypothetical=<tag-name>" is that then you can’t have more then one ohm:hypothetical tag(OSM does not allow duplicate keys).

Example uses:

  • ohm:hypothetical:name=yes
  • ohm:hypothetical:start_date=yes
  • ohm:hypothetical:end_date=no
  • ohm:hypothetical:landuse=yes

For marking up a hypothetical location I can see two approaches one is to just have ohm:hypothetical:ohm:location=yes another is go with ohm:hypothetical=yes.

Another approach to the problem would be to just append the hypothetical key with :hypothetical or :verifiable,

If it does exist a common solution I can replace my one, but I could not find one…

Anyone else that have been marking up any data as hypothetical? How did you do this?

Feedback on this?

The tags start_date/end_date should they be ohm:start_date/ohm:end_date? They are OHM specific as far as I know.

Location: Himlinge, Katrineholms kommun, Södermanland County, Region Svealand, Sweden

Time slider

Posted by Edaen on 17 December 2014 in Swedish (Svenska)

Hi! I wonder if I’m on the right track? I’ve created boundaries for parishes in Stockholm county. The ambition has been to capture all changes. Every change means that a new parish is created. So far their names are separated by the addition of years to their names. Waiting for the time slider the boundaries are all piled on one another.

Getting Started

Posted by Tod Robbins on 2 July 2014 in English (English)

Who wants to work on a “getting started” guide for OHM? I’d love to collaborate and learn more about the platform.

Location: Sunset Ridge, Vista Plat, West Jordan, Salt Lake County, Utah, 84081-5694, United States of America

Hi Guys

Posted by lmirza3 on 9 June 2014 in English (English)

So, I’m not sure how many people are on this website. I just made this account today. I was going to start working on a historical map of the Chicago “L” Train system based on year. Are we allowed to contribute to the building of the time/date slider?

Location: Near West Side, Chicago, Cook County, Illinois, United States of America

It's working again

Posted by chippy on 22 April 2014 in English (English)

OpenHistoricalMap.org is working again… well the website only at least