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開放研討系列之三 Open Seminar Series 3 鄧東波 (Dongpo Deng) 2013.07.15 中央研究院資訊科學研究所 Mapping, Geovisualization and OpenStreetMap Monday, July 15, 2013

Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

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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

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Page 1: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

開放研討系列之三Open Seminar Series 3

鄧東波 (Dongpo Deng)于

2013.07.15中央研究院資訊科學研究所

Mapping, Geovisualization and OpenStreetMap

Monday, July 15, 2013

Page 2: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

OSM & Me

• 2005年11月12日加入OSM

• 2006年第一次畫的圖是在克羅埃西亞(Croatia),當時,台灣只有海岸線

• OSM 提供我另一個學習的平台

• 2012年SotM Taiwan 的主辦人

• 2013年SotM Asia & Taiwan 籌備委員

• Map Features (圖徵) 繁體中文版翻譯

• 製圖區域:中研院、南港舊庄、南投草屯、國姓、埔里、集集、武界.....

Monday, July 15, 2013

Page 4: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

圖片來源: http://goo.gl/DXOsj

以人口為基礎的比較統計地圖(Cartogram)

Monday, July 15, 2013

Page 7: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

圖片來源:http://goo.gl/3y3su

2012.4.27 聯合國大陸礁層界線委員會(CLCS)批准日本大陸礁層延伸案

Monday, July 15, 2013

Page 8: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

《天下全輿總圖》,據稱是莫易仝於1763年模仿1418年的《天下諸番識貢圖》所繪,但 1493年3月15日哥倫布發現新大陸,難道美洲是中國人發現的嗎?

是誰發現美洲?

圖片來源:http://goo.gl/fdlzR

Monday, July 15, 2013

Page 9: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

草根性地圖• 當地圖不在只是過去的地圖• 是一個充滿個人觀點、所需和記憶的地圖

圖片來源:http://goo.gl/7zIaZMonday, July 15, 2013

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台灣人的世界觀

圖片來源:http://goo.gl/BjOFV

Monday, July 15, 2013

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改變中的地理資訊

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地理資訊

• 地圖是地理空間資訊的載體,而地理資料呈現地圖的基礎

• 廣義而言,具有地理參照(geo-reference)的資料都可稱為地理資訊

• 地理坐標是清楚的地理參照,而地名、地址、郵遞區號、電線桿...等只要可以對應到地表空間上的真實位置都可以是地理參照

圖片來源:http://goo.gl/M2Xij

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GPS的普及• 美國於2000年解除人為干擾  (SA, Selective Availability),民用的GPS提高了定位精度

• 如今,GPS裝置是智慧型手機的基本配備

• 利用智慧型手機拍照和發送訊息都可以附加上地理標籤(Geotag)

• 人人都可以生產地理資訊

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打卡(Chick-in)了嗎?

Monday, July 15, 2013

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集合眾人手機訊號的地圖

http://opensignal.com/

Monday, July 15, 2013

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智慧型手機成為微型氣象站

http://weathersignal.com/

Monday, July 15, 2013

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參與(Participation)

Monday, July 15, 2013

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參與(participation)

• 地理資訊的生產者改變了,不再只有政府、學術機構、或相關的單位才能生產地理資料,一般未受地理資訊訓練的人也可以生產,且可以與其它人合作協同地畫地圖,如OpenStreetMap

Monday, July 15, 2013

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集合眾人的GPS航跡

Monday, July 15, 2013

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參與者合作協同式製圖

Monday, July 15, 2013

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完成一份可救災的地圖

Monday, July 15, 2013

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短時間內,海地的地圖完成並支持救災

地震前 地震7日後Source: Mikel Maron 2010

Monday, July 15, 2013

Page 24: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

輪椅地圖• 利用OSM的建物中wheelchair=yes的標記來告訴使用者,那一棟建築物是無障礙空間

Monday, July 15, 2013

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2010年泰國水患地圖

http://goo.gl/BcF89

利用Google Map 平台的協同合作製圖

Monday, July 15, 2013

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Safecast: 民間版輻射計量器

Mobile+Geiger counter

Source:http://blog.safecast.org/

Monday, July 15, 2013

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http://goo.gl/V1G5h

群眾收集輻射值揭露日本福島核電廠週遭輻射超標

Monday, July 15, 2013

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開放(Openness)

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開放(Openness)

• 邁向使用開放的地理資訊「標準」和「授權」

Source:http://goo.gl/kuM3JMonday, July 15, 2013

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公佈在網站上的資料不等於開放資料

Source: http://goo.gl/BQisnSource: http://goo.gl/YKTtq

自2013年7月1日起開放實價申報登錄資料,將分為「不動產買賣實價登錄批次資料」、「不動產租賃實價登錄批次資料」與「預售屋買賣實價登錄批次資料」等3項於政府資料開放平臺正式上架 (http://

data.gov.tw/opendata/News?newsid=News11)Monday, July 15, 2013

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農委會資料開放平台

在那裡?

以創用CC釋出資料

「好的米」真的好嗎?

Source:http://data.coa.gov.tw/Monday, July 15, 2013

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公開的資料,但沒有開放授權

Source: http://goo.gl/XkedA

Source: http://goo.gl/d7ESl

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土壤重金屬「鎘」超標位置

稻米產銷履歷中所記載的產地

約28公里

https://hackpad.com/Good-Rice-eDov1lMvSoK

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分享(Sharing)

Monday, July 15, 2013

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分享(sharing)

• 網路內容常因朋友間相互分享訊息而產生,而這些訊息之中常含有地理資訊,或者分享的資訊本身即是地理資訊,如Facebook, Twitter, Flickr

Monday, July 15, 2013

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社群媒體中的歧視性字眼

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美國人的“仇恨”地理空間

http://users.humboldt.edu/mstephens/hate/hate_map.html中文介紹 http://geocyber.org/blog/?p=557Monday, July 15, 2013

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Google Map Traffic

http://geocyber.org/blog/?p=540

為什麼這些地方塞車?

Monday, July 15, 2013

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Google Map Traffic

http://geocyber.org/blog/?p=540

為什麼這些地方塞車?

據說 Google 收集Android手機用戶的位置資訊來改善交通狀況

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混搭(Mashup)

Monday, July 15, 2013

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混搭(mashup)

• 線上地圖平台提供地理資訊操作與應用,個人可依喜好混合多種不同型態的資料,如Google Map

http://www.housingmaps.com/ http://weather.datamining.tw/uniform/Monday, July 15, 2013

Page 43: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

「哈比人:意外旅程」拍片位置圖

http://cartodb.github.io/cartodb.js/examples/TheHobbitLocations/互動的Monday, July 15, 2013

Page 44: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

舊金山市動態公車地圖

http://www.sflivebus.com/動態的Monday, July 15, 2013

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集體智慧(Collective Intelligence)

Monday, July 15, 2013

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集體智慧(collective intelligence)

• 網路內容是由多人所貢獻,合作協同是一種競爭和淘汰的過程,且可以形成一種共識,這樣子的共識即是智慧,例如,使用者可以自由地分類資料,使用標籤(tag)形成 folksonomy

Monday, July 15, 2013

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由Flickr照片了解觀光客偏好的地點紅色為觀光客,藍色為本地人

圖片來源: Eric FischerMonday, July 15, 2013

Page 48: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

社群媒體監測

http://geocommons.com/overlays/96487

Monday, July 15, 2013

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社群媒體監測

http://geocommons.com/overlays/96487

奧斯卡得獎電影未必讓人得到正面的情緒

Monday, July 15, 2013

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OpenStreetMap開放街圖

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• 開放且自由的地圖

• 開放地理資料

• 開放格式、開放源碼

• 在地的收集,全球的地理資料庫

• Open Data Commons Open Database License (ODbL)

• 全球性的合作協同計畫

• 收集群眾資料

• 開放授權資料

• 維基化(wiki-style)的地圖

OpenStreetMap

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• Mappers

• 田野調查• 利用GPS或walking paper在現場收集資料,並利用OSM的編輯器(於室內)製圖

• 螢幕數化• 利用開放授權的衛星影像來數化,如Bing

• 開放資料的輸入• 如美國TIGER(PD)、荷蘭AND(CC)....

OSM 資料來源

Monday, July 15, 2013

Page 53: Open seminar series 3: Mapping, Geovisualization and OpenStreetMap

• 上傳的GPS航跡和地理標籤照片

• 除了提供GPS航跡,也應參與繪圖

• 編輯地理物件的屬性• 名稱,如街名、大樓名• 型態,如道路等級• POI

• 交通設施...等

An OSM Mapper

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• 行前準備• 你註冊了嗎?• 記事本、相機、GPS、紙圖、機車或自行車...

• 現場資料收集• 上傳GPS traces

• 編輯地圖(用Bing Map)

• 查看地圖

OSM Mapping 步驟

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行前準備

Monday, July 15, 2013

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你註冊帳號了嗎?

Monday, July 15, 2013

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你註冊帳號了嗎?

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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GPS

Monday, July 15, 2013

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收集資料

Monday, July 15, 2013

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• GPS 航跡

• 地理標籤照片• 紙筆

(http://fieldpapers.org)

• 其它,如Mobile

收集資料

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<?xml version="1.0" encoding="UTF-8"?><gpx version="1.0">

<wpt lat="34.377012038603425" lon="7.912682974711061"><time>2010-12-19T13:42:47Z</time>

<name>Water fall</name></wpt><trk> <name>ACTIVE LOG 001</name> <trkseg>

<trkpt lat="50.079439021646976" lon="14.420736003667116"> <ele>178</ele>

</trkpt> <trkpt lat="50.078988997265697" lon="14.420714965090156">

<ele>195</ele> </trkpt> <trkpt lat="50.079096034169197" lon="14.420756958425045">

<ele>199</ele> </trkpt> .....

</trkseg></gpx>

GPS traces

Monday, July 15, 2013

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Ikiya, 2012, Mapping of historical places in Japan, SotM2012

任何時候都把GPS打開記錄

Monday, July 15, 2013

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草屯鎮土地公廟調查

Monday, July 15, 2013

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如何利用GPS得到更好的Mapping

Monday, July 15, 2013

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Ikiya, 2012, Mapping of historical places in Japan, SotM2012

活用waypoints

Monday, July 15, 2013

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Ikiya, 2012, Mapping of historical places in Japan, SotM2012

利用waypoints決定地理物件

Monday, July 15, 2013

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Ikiya, 2012, Mapping of historical places in Japan, SotM2012

Monday, July 15, 2013

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Kodak DCS Pro SLR/n1400萬象素Garmin etrex GPSGarmin原廠傳輸線Kodak RS232,音源線

Nikon D2001020萬象素Garmin 18 GPSGarmin傳輸線(rs232)Nikon MC35接線

Kodak DCS Pro SLR/n1400萬象素Holux 236 GPSmin usb 轉RS232傳輸線Kodak RS232,音源線

Nikon D2001020萬象素di GPS

GPS+Photo

Monday, July 15, 2013

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拍照可以記錄重要的資訊

Monday, July 15, 2013

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拍照的位置並非mapping目標的位置

Monday, July 15, 2013

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http://www.openstreetmap.org/traces

上傳GPS

Monday, July 15, 2013

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http://walking-papers.org

Walking Paper來收集資料

Monday, July 15, 2013

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將掃瞄且上傳的walking paper用在JSOM上做地圖編輯

Monday, July 15, 2013

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編輯地圖

Monday, July 15, 2013

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幾何資料型態

Tag

NodeWay

Open polyline

Closed polyline

Area

Relation

更多資訊 http://wiki.openstreetmap.org/wiki/Data_PrimitivesMonday, July 15, 2013

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Node(lat, lon) Relation Way

Tag(Key, Value)

(role)

0..n 0..n

(role)

0..n 0..n

0..n

0..n

1 1 1

(role)

0..n 0..n

<use>

is part of

0..n

OSM幾何資料模型

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<node id='1762782473' timestamp='2012-12-12T03:49:16Z' uid='1048' user='dongpo' visible='true' version='2' changeset='14245247' lat='23.864527' lon='121.5217101'> <tag k='name' v='立川漁場' /> <tag k='tourism' v='attraction' /> <tag k='source' v='survey' /> <tag k='addr: housenumber' v='45' /> <tag k='addr:district' v='魚池' /> <tag k='addr:town' v='壽豐鄉' /> <tag k='addr:county' v='花蓮縣' /> </node>

Node

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<way id='118416207' timestamp='2012-05-23T17:43:06Z' uid='1048' user='dongpo' visible='true' version='4' changeset='14246301'> <nd ref='1088092959' /> <nd ref='1088092953' /> .... <nd ref='1600948228' /> <tag k='highway' v='primary' /> <tag k='lanes' v='2' /> <tag k='oneway' v='yes' /> <tag k='ref' v='Hwy 11C' /> <tag k='ref:zh' v='台11丙線' /> </way>

Way

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<relation id='2498406' timestamp='2012-10-14T19:01:55Z' uid='1048' user='dongpo' visible='true' version='1' changeset='13497007'> <member type='way' ref='185846446' role='outer' /> <member type='way' ref='185846444' role='outer' /> <member type='way' ref='151063000' role='outer' /> <member type='way' ref='185846448' role='outer' /> <member type='way' ref='185846445' role='outer' /> <tag k='admin_level' v='8' /> <tag k='boundary' v='administrative' /> <tag k='name' v='草屯鎮 (Caotun)' /> <tag k='name:en' v='Caotun' /> <tag k='name:zh' v='草屯鎮' /> <tag k='type' v='boundary' /> </relation>

Relation

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changeset

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highway=motorway_link

highway=motorway

highway=primary

highway=cycleway

highway=trunk

highway=residential

highway=tertiary

highway=unclassified

highway=secondary

highway=bus_stop

Monday, July 15, 2013

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圖徵 (Map feature)

Monday, July 15, 2013

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JOSM

Monday, July 15, 2013

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Potlatch 2

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iD

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• Apple iOS

• e.g. Go Map!!

• Andriod

• e.g. OSMAnd

See more details http://wiki.openstreetmap.org/wiki/Software

智慧型手機中Apps

Monday, July 15, 2013

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資料檢核• 和所有自由軟體一樣,資料品質的檢核是由社群完成• Linus’ law

• given enough eyeballs, all bugs are shallow

• 充夠的繪圖者和地圖使用者,所有問題很快的就會被發現。

Monday, July 15, 2013

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OSM的架構

Geodata Editing Backend Rendering Visualization

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Backend

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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

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Rendering system

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Mapnikwww.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

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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

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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.

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Visualization

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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/DevelopMonday, July 15, 2013