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Creating a world map with a time slider
Historical Pasila – steps towards historical street view
The Digital Humanities hackathon was arranged by University of Helsinki & Aalto University for the second time 16–20 May 2016. The educational event aimed to bring together students and researchers of humanities, social sciences and computer science, for a week of active co-operation in groups under the heading of Digital Humanities.
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä Hakli Kari, Valokuvaaja 1973 Helsingin kaupunginmuseo Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15 (= Pasilan puistotie, Hertanmäki). Oikealla Hertankatu 13, jossa 1970 lopettanut jalkinekorjaamo. — negatiivi, filmi, mv
Pasila, Länsi-Pasila Alanco Jan HKM, Valokuvaaja 8.6.1982 Helsingin kaupunginmuseo Pasila, Länsi-Pasila. Pasilanraitio 13, Pasilan poliisitalo. Kuvattu Radiokadulta Leanportin suuntaan. Taustalla Hertanmäen puutalot. — negatiivi ja vedos, filmi paperi, mv
We chose Western Pasila as a neighbourhood we wanted to observe. It is the last wooden village that has been torn down to make way for a completely new housing project. At the time, it was also the last remaining freely built working class neighbourhood, dating back to the turn of the 20th century. The area had been under threat of demolition since the 1940’s, which had led to negligence and deterioration of living conditions.
Finna has an impressive collection of openly licensed photographs from the area, taken mainly by photographers of the Helsinki City Museum in a pursuit of documenting the disappearing environment. The photographs do not have exact coordinate location in their metadata, and Timo Laine, who also works for Finna, proposed to use the street name tags to find all Pasila images instead. To get a list of the names, we digitized 2 publications of Helsinki historical street names and used the list to query Finna images.
Reverend Väinö Kantele – Architect Reijo Jallinoja index
Timo came up with a method of evaluating the images by the nature of their keywords. The elements of change were positioned on an axis: old–new, wood–concrete, soft–hard, past–future, freedom–control, community–family unit, Reverend Kantele–Reijo Jallinoja (Reverend Väinö Kantele was a missionary who decided to devote his life to aiding the poor people of Pasila, while Reijo Jallinoja was the architect of the new Western Pasila). Keywords were assigned to one or the other category, and this produced an index number for each image.
I started working towards a street view experiment. First we needed to create a map of the area.
I took a 1969 aerial image from HRI to work with. I used the Wikimaps workflow to do that: I uploaded it to Wikimedia Commons, added the Map template to it and used Wikimaps Warper to georeference it. I was lucky enough to find a few houses that remained from before the development for compositing the then and now images. The file exists also as a readily georeferenced GeoTIFF.
Making a historical map
OpenHistoricalMap is the perfect tool and environment for historical mapping, even though the project is not yet stable. It has all the same tools as OpenStreetMap for creating a map. Features are tagged with start and end dates and that will allow setting and displaying map features on a timeline (in the future).
Turning the map data in OpenHistoricalMap into something that other environments can use is difficult. After trying out many unsupported, broken and obsolete workflows, I found a working solution.
For exporting the data using the OpenStreetMap desktop editor JOSM works nicely. Albin Larsson has written a useful blog post to encompass in making the right settings. OHM’s own export is currently dysfunctional.
For converting the .osm file format into GeoJSON or KML, it’s possible to use Overpass Turbo for OpenHistoricalMap. It requires learning the query language.
Historical street view vistas should be easy and painless to create for volunteer contributors. I keep looking for a workflow that is open, easy, collaborative and productive.
I took a test set of 12 images of the same building from different angles over a few years period.
Elannon Pasilan myymälä. Hertankatu 15. 28. -29. 8 1971 välisenä yönä myymälä muutettu palvelusmyymälästä pikamyymäläksi.
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15.
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15 (= Pasilan puistotie, Hertanmäki)
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15 (= Pasilan puistotie, Hertanmäki)
Kiviset portin pylväät, vasemmalla Elannon myymälärakennus Hertankatu 15:ssä sekä oikealla Eevankadun puutaloja Länsi-Pasilassa. Kesä 1974. Kuvattu Susannankadulta käsin.
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15 (= Pasilan puistotie, Hertanmäki). Kuvattu mahd. Susannankadulta.
Eevankatu. Puutaloja Eevankadulla Länsi-Pasilassa. Vasemmalla Elannon takapihaa.
Pasila. Susannankatu 2 – Hertankatu 18. Vasemmalla oleva rakennus (noin Hertankatu 18) on mahdollisesti ollut lastentarhana, oikealla oleva kauppa (Susannankatu 2) on tunnettu “Mattilan kauppana”
Hertankatu 9. Kyllikinkatu 4. Näkymä Kyllikinkadun kulmasta Hertankadulle. Jätehuoltoauto Hertankatu 9:n puutalon edustalla, jonka kivijalassa parturi ja Maanviljelijäin Maitokeskuksen myymälä. Kadun päässä Elannon liikerakennus.
Kaksi tyttöä sateen kastelemalla Hertankadulla puutalojen Länsi-Pasilassa. Kesä 1974. Vasemmalla Hertankatu 12, oikealla Hertankatu 11, 13. Keskellä siintää Elannon liikerakennus (Hertankatu 15, Elannon myymälä lopetti toimintansa 22.6. 1979.)
Elannon uusi Pasilan liiketalo, jossa oli sekatavara- ja leipämyymälä. Hertankatu 15 (= Pasilan puistotie, Hertanmäki). Oikealla Hertankatu 13, jossa 1970 lopettanut jalkinekorjaamo.
Ajapaik project would be my option for crowdsourcing the locations and directions of the images. This time there was no time for a collaborative effort, so I followed a workflow that was tested in Maptime Copenhagen together with Mapillary.
Geosetter is a great application (Windows only) for setting the location and heading of images, and writing the data in the EXIF metadata section of the image.
It does not seem possible to load a historical map layer into Geosetter, which would be not only useful but essential in order to geolocate historical images.
The advantage of Google Earth is the display of 3D terrain and buildings. I planned to import the converted historical map into SketchUp and define height to the buildings, but I was not able to convert the file to a format SketchUp would understand. It would be possible to use Google Earth to overlay the image onto a 3D view and be able to place it correctly. This workflow should be ported to an open platform.
The street view in Mapillary
After the files were prepared with proper EXIF data, they were ready to be imported into Mapillary. In this test I stopped here. The series of images did not yet resemble a street view experience. There are controls I can use to tie the images correctly together. MapillaryJS is available for further tinkering. I will look into them for the next blog post.
The street view experiments can continue in workshops during the summer. There will be one in Wikimania in Esino Lario, Italy 22–26 June and another one in the Second Swiss Cultural Hackathon in Basel 1–2 July. I will also bring this workflow into discussion in the Beyond the Basics: What Next for Crowdsourcing workshop in the DH2016 conference in Krakow 11–16 July.
Apologies for our group for not presenting all our findings! The presentation will give more insight into that. Thank you for inspiring collaboration during the week!
Thank you for the organizers and participants in other groups for an intensive and energetic week with Digital Humanities hacking!
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This entry was posted in Showcase on 25 May 2016 by Susanna Ånäs.
What A Summer This Will Be
My name is Jaime Lyn Schatz and through luck and skill and more than a little chutzpah, I am a newly minted Gnome/FOSS OPW intern on the OpenHistoricalMap Project. I will be working with a terrific team of engineers[1] who are volunteering their time to this project, including Robert Warren, who will be my mentor through this journey. I feel deeply honored and incredibly lucky to have this opportunity.
The Wikimaps project seeks to draw together data from the OpenStreetMap and OpenHistoricalMap projects to enable users to view maps backward through the 4th dimension: time. (Allowing users to view maps that reach forward in the 4th dimension is, sadly, out of the scope of this project. 😉 )
Congrats to 44 applicants accepted for the new round & 5 more accepted for @gsoc! Big thank you to our sponsors! https://t.co/ZTocwtPBBY
— FOSS for Women (@fossopw) 21. huhtikuuta 2014
The entire project has three main modules:
1. Enhance the iD, the Javascript map editor, and The_Rails_Port, the OHM backend, so that a Javascript time/date slider can be added to control the time period that is of interest.
2. Enhance the iD and The_Rails_Port so that meta-data hooks are added to the code that allow for custom deployments of both software. This will allow multiple interfaces to be generated from the same data source.
3. Modify Mapnik, the software that renders the map images, to handle starting and ending dates for maps shown.
My next steps will be to get up to speed on the nitty-gritty of the iD and The_Rails_Port code bases and to develop a Minimum Viable Product for the time slider. Stay tuned for updates!
[1] Robert Warren, Tim Waters, Sanjay Bhangar, Jeff Meyer and Susanna Ånäs (Project Leader).
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This entry was posted in Showcase, Wikimaps Tools on 23 April 2014 by jaimelyn.
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