2015-10-02 GitHub Universe@San Francisco “Changing Lives with Open Data” GSI Maps for the next wave ! of civic innovation Hidenori FUJIMURA Geospatial Information Authority of Japan 1 Mi G ni e s os try pat of ial L I and, Inf nform r atiast on r uc Autur h e, T orit r y ansport and T of Japan ourism
Geospatial Information Authority of Japan 2 We are Japan’s National Geospatial Information Authority.
Open Data 4 We provide more than 1,200 layers from GSI Maps. We use open standards such as slippy map tilenames, GeoJSON and KML. 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 5 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
Our repos in GitHub 6 vector-tile-experiment gsitiles-cesium GSI Tiles in Cesium vector tiles of our map data daicho-init initialize daicho layers-dot-txt-spec mokuroku-generator generate mokuroku by scanning tileset layer metadata for web maps in JSON mokuroku-spec daicho-spec mokuroku in SQLite metadata for each tiles in CSV style-dot-js-spece convention for the style of vector tiles qdltc gsimaps octpng-spec availability tiles in an octave high cmp tiles downloader source code of GSI Maps octpng-bin compare tiles availability tiles generator kakotile-spec ckanext-basemaps geojson-with-style-spec selectable base maps in CKAN metadata for past tiles convention to add style information in GeoJSON gdal2xyztiles.py OGC WMTS metadata of GSI Tiles kakotile-generator dkgshp2geojsontiles generate kakotile by scanning backups convert GSI’s Shapefile data to GeoJSON Tiles experimental_wmts cocotile-spec experimental_dem OGC WMTS metadata of GSI Tiles metadata for available layers for each tile id server-load DEM data in vector tiles monitor server load
Disaster information from GSI 7 Current menu of disaster information Our mission includes providing disaster information:
volcano (1) To provide the whole nation direct access to the volcano information about the situation; volcano volcano → We typically receive 4 times much tile access in the period of disaster response. volcano volcano
flood (2) To support further disaster response by related volcano organizations. volcano → Our support includes providing 3D-handouts FY2014 FY2013 -FY2012
September 27, 2014 8 Mt. Ontake erupted.
Emergency photogrammetric flight to Mt. Ontake 9 Normally, photogrammetric flight fly over the area. In this case, our airplane had to fly around the volcano with the eruption. 2015-09-28/29 Oblique photograph 2015-09-29/30 Airborne SAR
Facing high demand for data 10 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.
Special site to meet high demand (gh-pages) 11 Just a few hours to develop + deploy Oblique photos from emergency flights. InSAR images to indicate land deformation. Ash deposit detected by incoherent area
12 We used photosynth to add more intuitive view to our photos.
13 September 11, 2015: Flood from broken dyke in Joso city We flew a drone over the flooding river to capture the situation. → flood → normal river flow → Movie available for download and at YouTube
We organized obtained data in GSI Maps 14
15 We also captured the recovery of the dyke by a drone. • after Movie available for download and at YouTube
Needs for comparing different orthophotos 16 • 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.
Comparing orthophotos (gh-pages) 17 • aaa Just a few hours to develop + deploy Day 1 Day 18 Out tweets to announce this site got many retweets.
Open collaboration works! 18 Our orthophoto comparing site keeps improving by social coding. The support for IE was not enough in the first versions. New issue for iOS9 browsers is open a An external developer gave us a Pull Request few days ago… for IE9+ support, and we merged it.
Your contributions are welcome!
More open collaboration by Open Data 19 Our orthophotos for the big earthquake in 2011 are included in the open source version of the East Japan Earthquake Archive (shinsai.mapping.jp). Our orthopthotos News archive Messages from residents Our Open Data obtained new values by Open Collaboration!
Conclusion 20 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.