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20150918 從圖層看OSM所記錄的世界
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20150918 從圖層看OSM所記錄的世界
1.
從圖層看 OSM 所記錄的世界 2015/09/18 SOTM
Taiwan 1 ⿈黃裕翔
2.
關於我... • 2014/2 開始繪圖 •
2015/9/17之前 ⼯工程顧問公司 ⽔水利⼯工程師 (我真的只是剛好在SOTM前⼀一天離職) • OSM ID : yellowsoar 2
3.
在談圖層前... 先知道兩個東⻄西 3
4.
圖磚 - OSM
的⼀一部分 4
5.
資料 - 也是
OSM 的⼀一部分 5
6.
在談圖層前... 先聊聊資料組成 6
7.
資料組成 - 圖徵與標籤 7 點
路徑 關係 開放式 封閉式 填滿式 標籤
8.
然後這些資料 會轉出成圖磚 8
9.
在談圖層前... 先來看標⽰示⽅方法 9
10.
點 興趣點 POI Point Of Interest 10
11.
點 興趣點 POI Point Of Interest 11 Photo
by:KOKUYO
12.
點 興趣點 POI Point Of Interest 12
13.
開放/封閉路徑 • 道路 • 鐵路 •
⽔水路 • 電路 • 纜線 • 管線 • ⾏行政界 • ⼭山徑 13
14.
填滿式路徑 (就是⾯面積) • Building • Landuse •
Landuse • Amenity • Leisure • Tourism • Natural • Waterway • Highway? 14 http://wiki.openstreetmap.org/wiki/Proposed_features/Street_area
15.
那圖層是...? 15
16.
OSM WIKI 圖層 layer=* 16
17.
這顯然不⾜足以代表 OSM 所記錄的世界嘛! 17
18.
所以看圖徵之間的關聯 18
19.
例如 • 與道路相交的⽔水路,原則上不會跟道路相連。 • 標⽰示為
Amenity 的學校裡⾯面有好幾棟建築物。 • Landuse、Natural、Waterway 相連但絕不重疊。 • 電路跨過建築物⼜又跨過道路網跟誰都不相連。 • ⾏行政界最孤僻,跟其他圖徵幾乎⽼老死不相往來。 • 興趣點愛怎麼樣就怎麼樣,黏在哪都可以。 19
20.
依據這些關聯重新分類 20
21.
21 圖層 對應的圖徵 POI 族繁 不及備載 交通路網 道路 鐵路 ⼭山徑 ⽔水系 河川 排⽔水路 灌溉溝 管線路 電路 纜線 管線 圖層 對應的圖徵 ⾏行政界 國界、縣市界 鄉鎮市區界 村⾥里界 建築物 ⼟土地使⽤用 室內地圖
22.
那... 這有什麼意義? 22
23.
提升資料編輯品質 例如使⽤用 JOSM 編輯⼟土地利⽤用時,所採⽤用的過濾條件: landuse=*
OR waterway=* OR amenity=* OR natural=* 23
24.
⼯工作⼩小組 任務導向性的繪圖⼯工作模式 24
25.
End 25
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