M.; Ruddat, M.; Yamu, C. Urban Digital Twins for Smart Cities and Citizens: The Case Study of Herrenberg, Germany. Sustainability 2020, 12, 2307. Kilsedar, C.E.; Brovelli, M.A. Multidimensional Visualization and Processing of Big Open Urban Geospatial Data on the Web. ISPRS Int. J. Geo-Inf. 2020, 9, 434. 背景
Flowing data Input POI data Input Feature data Input Building data Aerial photo Convert Tileset data Zoom 11-18 Convert JSON data Zoom 11-18 Convert GeoJSON data Zoom 12-18 Zoom 14-18 Zoom level of Map layers output output output Icon GeoJSON Trips Tileset Tippecanoe gdal2tiles pdal + py3dtiles 表⽰⽤ズームレベルの最適化
Y, Z 地点数 元データ (MB) タイル化 後 (MB) Place A (28-D0201-01) 22,854,836 594.2 344.1 Place B (29-K2452-01) 2,141,686 55.7 34.7 Place C (28-K2450-01) 2,301,317 59.8 32.3 Place D (掛川城) 192,366,079 6,540.0 64.3 Place E (韮⼭反射炉) 182,440,910 4,740.0 82.9 ▼Shizuoka Point Cloud DB (PCDB)
with a large number of points Multi-layered display of hazard maps (disaster prevention data) Road management: Bridge and People Flow Data Community bus GTFS dara