Ministry of Land, Infrastructure, Transport and Tourism Geospatial Information Authority of Japan GSI Maps for the next wave ! of civic innovation Hidenori FUJIMURA Geospatial Information Authority of Japan 1 2015-10-02 GitHub Universe@San Francisco “Changing Lives with Open Data”

Geospatial Information Authority of Japan We are Japan’s National Geospatial Information Authority. 2

GSI Maps since 2003 http://maps.gsi.go.jp/ 3 orthophotos thematic maps disaster information topographic maps

Open Data We provide more than 1,200 layers from GSI Maps. We use open standards such as slippy map tilenames, GeoJSON and KML. 4 According to the Open Data Strategy of the Japanese Government, we use the Government Standard License which is similar to CC-BY. Our data can be embedded in any online or offline systems. I hope, in future, our tiles become the first secondary background map in GeoJSON mapping function of GitHub ❤︎.

Open Source How do we mappers think about open source? We would like to provide a choice of our maps, wherever there is a need for mapping Japan. So we build upon and release open source software and open standards, to reduce the reason not to use our maps. License: BSD or CC0 5

Our repos in GitHub 6 gsimaps source code of GSI Maps cmp compare tiles experimental_dem DEM data in vector tiles layers-dot-txt-spec layer metadata for web maps in JSON experimental_wmts OGC WMTS metadata of GSI Tiles kakotile-spec metadata for past tiles cocotile-spec metadata for available layers for each tile id mokuroku-spec metadata for each tiles in CSV mokuroku-generator generate mokuroku by scanning tileset kakotile-generator generate kakotile by scanning backups dkgshp2geojsontiles convert GSI’s Shapefile data to GeoJSON Tiles octpng-spec availability tiles in an octave high octpng-bin availability tiles generator daicho-spec mokuroku in SQLite daicho-init initialize daicho qdltc tiles downloader server-load monitor server load vector-tile-experiment vector tiles of our map data gsitiles-cesium GSI Tiles in Cesium geojson-with-style-spec convention to add style information in GeoJSON gdal2xyztiles.py OGC WMTS metadata of GSI Tiles style-dot-js-spece convention for the style of vector tiles ckanext-basemaps selectable base maps in CKAN

Disaster information from GSI Our mission includes providing disaster information: (1) To provide the whole nation direct access to the information about the situation; → We typically receive 4 times much tile access in the period of disaster response. (2) To support further disaster response by related organizations. → Our support includes providing 3D-handouts 7 Current menu of disaster information volcano volcano volcano volcano volcano volcano flood volcano volcano FY2014 FY2013 -FY2012

8 September 27, 2014 Mt. Ontake erupted.

Emergency photogrammetric flight to Mt. Ontake Normally, photogrammetric flight fly over the area. In this case, our airplane had to fly around the volcano with the eruption. 9 2015-09-28/29 Oblique photograph 2015-09-29/30 Airborne SAR

Facing high demand for data We took many photos. Because many people concerned about the situation, the access exceeded the capacity of the GSI Maps system at that time. We needed to develop a bypass system a.s.a.p. 10

Special site to meet high demand (gh-pages) 11 Oblique photos from emergency flights. InSAR images to indicate land deformation. Ash deposit detected by incoherent area Just a few hours to develop + deploy

We used photosynth to add more intuitive view to our photos. 12

13 We flew a drone over the flooding river to capture the situation. September 11, 2015: Flood from broken dyke in Joso city → normal river flow → flood → Movie available for download and at YouTube

We organized obtained data in GSI Maps 14

•  after 15 We also captured the recovery of the dyke by a drone. Movie available for download and at YouTube

Needs for comparing different orthophotos •  We were successful to capture orthophotos of different stages of recovery. •  It turned out that the comparison between orthophotos in GSI Maps was not so easy. •  We decided to develop a special site for providing comparison function before we get requests from users. 16

Comparing orthophotos (gh-pages) •  aaa 17 Just a few hours to develop + deploy Day 1 Day 18 Out tweets to announce this site got many retweets.

Open collaboration works! Our orthophoto comparing site keeps improving by social coding. 18 The support for IE was not enough in the first versions. An external developer gave us a Pull Request for IE9+ support, and we merged it. New issue for iOS9 browsers is open a few days ago… Your contributions are welcome!

More open collaboration by Open Data Our orthophotos for the big earthquake in 2011 are included in the open source version of the East Japan Earthquake Archive (shinsai.mapping.jp). 19 Our orthopthotos Messages from residents News archive Our Open Data obtained new values by Open Collaboration!

Conclusion 1.  GSI build upon and release open source software and open standards to maximize the use of its open data. 2.  GitHub Flow and GitHub Pages helped us a lot. 3.  Our open data are producing more values by collaborating with external developers. 20