This is the slides presented at Open Seminar Series in Institute of Information Science, Academia Sinica. The seminar information information was posted at
http://registrano.com/events/b05266
The One and Many Maps: Participatory and Temporal Diversities in OpenStreetMapDongpo Deng
OpenStreetMap is an open and collaborative project with thousands of people contributing GPS traces and other data into the making of a global map of places and networks. It is open in the sense that everyone can contribute to the project, and results from the project are free for everyone to reuse. This is contrary to traditional cartography where often a central authority controls the making of the map and its release. Is OpenStreetMap more democratic, and in what sense? Is OpenStreetMap more relevant to the mass, and how can we judge?
We define and use several metrics to measure temporal properties of dened areas in OpenStreetMap, and to sample modes of participation in these areas. These metrics are used to graph the datasets representing the current OpenStreetMap so as to reveal unevenness in user participation and data temporality. We use the dataset about Taiwan as a test case to observe participatory and temporal diversities among different areas of Taiwan in OpenStreetMap.
Geostatistics Portal - the multitool for statistics on mapsMirosław Migacz
18.06.2014 - INSPIRE Conference 2014, Aalborg, Denmark
In July 2013 Central Statistical Office of Poland (CSO) launched the Geostatistics Portal. The Portal’s database holds vast amounts of statistical data gathered in the 2010-2011 census round. This data can be geovisualized in various ways on choropleth and diagram maps. Building such a powerful tool gives polish official statistics an opportunity to do much more than just to publish census results.
This year a new dataset has been introduced to the Geostatistics Portal – the Local Data Bank. It contains statistical data of a broad scope that are available at a municipality (LAU2) level. The Bank is regularly updated and holds historical statistics as well. Up to now the statistical data was only available for view and download in tables. The Geostatistics Portal provides an extensive set of tools to visualize the data on maps.
Central Statistical Office of Poland actively participates in EU projects that cover merging statistical and geographic data, including presenting statistical data on grids. Methodology developed in these projects will allow CSO to publish georeferenced statistical data in divisions other than administrative. A population map for units below municipality level (statistical regions and census enumeration areas) is to be published, as well as population maps on kilometer grids of various cell sizes.
Even though the Geostatistics Portal already offers a broad choice of geovisualization tools, there are plans for developing new ones. This includes new cartographic presentation methods (e.g. cartograms), a more convenient way to visualize and compare time series and tools for on-the-fly visualization of user-supplied data.
Apart from statistical data and tools to visualize them, the Geostatistics Portal also provides INSPIRE services for themes CSO is responsible for: statistical units and demography. Access to all services (discovery, view, download) is public and free of charge.
Launching of the Geostatistics Portal last year was a giant step forward in providing users with a convenient and intuitive way to access statistical data on maps. With a huge database and a wide range of visualization tools at their disposal, users can design their own dynamic map presentations rather than rely on static maps that were included in publications so far. Central Statistical Office of Poland constantly works on improving the Geostatistics Portal – publishing new data and developing new tools for geovisualization and spatial analysis – all this to bring statistical data closer to the people and authorities and make governance easier on all administrative levels.
The movie will not work here because it is a pdf. In this description, I will include notes for the presentation.
Slide 3: On the left is the DEM dataset. It is 30x30 meter resolution and everything was georeferenced to NAD 83 Illinois State Planar West Zone. The image on the right was used for digitizing the shapefiles. It is a image taken from Google Earth that was brought into ArcMap and then georeferenced.
Slide 6: This is a very basic ranch style house model created in Google SketchUp. Using the ArcScene Symbology, this model could be imported as a point. All of the other 3D models that is symbolized in the neighborhood comes from the default ESRI database.
Slide 9: This image is used to show the underground water pipes.
The One and Many Maps: Participatory and Temporal Diversities in OpenStreetMapDongpo Deng
OpenStreetMap is an open and collaborative project with thousands of people contributing GPS traces and other data into the making of a global map of places and networks. It is open in the sense that everyone can contribute to the project, and results from the project are free for everyone to reuse. This is contrary to traditional cartography where often a central authority controls the making of the map and its release. Is OpenStreetMap more democratic, and in what sense? Is OpenStreetMap more relevant to the mass, and how can we judge?
We define and use several metrics to measure temporal properties of dened areas in OpenStreetMap, and to sample modes of participation in these areas. These metrics are used to graph the datasets representing the current OpenStreetMap so as to reveal unevenness in user participation and data temporality. We use the dataset about Taiwan as a test case to observe participatory and temporal diversities among different areas of Taiwan in OpenStreetMap.
Geostatistics Portal - the multitool for statistics on mapsMirosław Migacz
18.06.2014 - INSPIRE Conference 2014, Aalborg, Denmark
In July 2013 Central Statistical Office of Poland (CSO) launched the Geostatistics Portal. The Portal’s database holds vast amounts of statistical data gathered in the 2010-2011 census round. This data can be geovisualized in various ways on choropleth and diagram maps. Building such a powerful tool gives polish official statistics an opportunity to do much more than just to publish census results.
This year a new dataset has been introduced to the Geostatistics Portal – the Local Data Bank. It contains statistical data of a broad scope that are available at a municipality (LAU2) level. The Bank is regularly updated and holds historical statistics as well. Up to now the statistical data was only available for view and download in tables. The Geostatistics Portal provides an extensive set of tools to visualize the data on maps.
Central Statistical Office of Poland actively participates in EU projects that cover merging statistical and geographic data, including presenting statistical data on grids. Methodology developed in these projects will allow CSO to publish georeferenced statistical data in divisions other than administrative. A population map for units below municipality level (statistical regions and census enumeration areas) is to be published, as well as population maps on kilometer grids of various cell sizes.
Even though the Geostatistics Portal already offers a broad choice of geovisualization tools, there are plans for developing new ones. This includes new cartographic presentation methods (e.g. cartograms), a more convenient way to visualize and compare time series and tools for on-the-fly visualization of user-supplied data.
Apart from statistical data and tools to visualize them, the Geostatistics Portal also provides INSPIRE services for themes CSO is responsible for: statistical units and demography. Access to all services (discovery, view, download) is public and free of charge.
Launching of the Geostatistics Portal last year was a giant step forward in providing users with a convenient and intuitive way to access statistical data on maps. With a huge database and a wide range of visualization tools at their disposal, users can design their own dynamic map presentations rather than rely on static maps that were included in publications so far. Central Statistical Office of Poland constantly works on improving the Geostatistics Portal – publishing new data and developing new tools for geovisualization and spatial analysis – all this to bring statistical data closer to the people and authorities and make governance easier on all administrative levels.
The movie will not work here because it is a pdf. In this description, I will include notes for the presentation.
Slide 3: On the left is the DEM dataset. It is 30x30 meter resolution and everything was georeferenced to NAD 83 Illinois State Planar West Zone. The image on the right was used for digitizing the shapefiles. It is a image taken from Google Earth that was brought into ArcMap and then georeferenced.
Slide 6: This is a very basic ranch style house model created in Google SketchUp. Using the ArcScene Symbology, this model could be imported as a point. All of the other 3D models that is symbolized in the neighborhood comes from the default ESRI database.
Slide 9: This image is used to show the underground water pipes.
Crowdsourced mapping for open collaboration: A story of Taiwan so farDongpo Deng
The slides presented in State of the Map Japan 2014 mainly introduced the development status of the OSM Taiwan community, and the idea of community mapping is implemented in Taiwan.
95. Backend database: PostgreSQL
• OSM doesn’t use geometry type of PostgreSQL
and geospatial functions of PostGIS.
• OSM API v0.6 is used for the main central OSM
DB running on servers.
• http://wiki.openstreetmap.org/wiki/API_v0.6
• Osmosis is used to populate a more general
PostgreSQL/PostGIS DB from Planet.osm dump
file.
• http://wiki.openstreetmap.org/wiki/Osmosis
Monday, July 15, 2013
97. Mapnik
www.mapnik.org
• OSM uses Mapnik to render 256 X
256 pixels tiles
• osm2pgsql is used to convert OSM
data to postgreSQL for Mapnik
rendering
• Map sytles are controlled by
stylesheet (XML) files.
• Useful tutorial! https://github.com/
mapnik/mapnik/wiki/MapnikTutorials
Monday, July 15, 2013
98. Mod tile
• Mod tile is a system to serve tiles, for
example to use within a slippy map.
• The implement of Mod file is split into two
ports
• mod_tile is a custom Apache module
which is responsible for serving tiles and
requests the rendering of tiles
• renderd - A rendering daemon which calls
mapnik and writes the map tiles to the
filesystem
Monday, July 15, 2013
99. tile@home
• Tiles@home (short:T@H or tah) is a distributed
program to render Osmarender maps.
• T@H has a server software,Tahngo (generation
2), running at the Tiles@home website, which get
requests to render tiles from updated mapdata.
Monday, July 15, 2013
101. Slippy map
• The slippy is an Ajax component. JavaScript runs in the
browser, which dynamically requests tiles from the
server in the background (without reloading web page)
to give a smooth map browsing experiences.
• The implementation of slippy map is mostly provided
by OpenLayers
• The tiles rendering usually comes from two resources
• Mapnik tile rendering
• Osmrender (tiles@home) tile rendering
See details http://wiki.openstreetmap.org/wiki/Develop
Monday, July 15, 2013