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Layer guide
What each layer on the map shows and how to use it.
🕰️ Historical Maps
Historical maps from different periods, for tracing how the campus area has changed:
- • 1904 Taiwan Baotu (cadastral survey) - A topographic map from the early Japanese colonial period, showing major watercourses such as the Liu-kong-tsun Canal.
- • 1921 Topographic Map - A survey from the mid-colonial period, by which time irrigation infrastructure had become more established.
- • 1939 Liu-kong-tsun Irrigation District Map - A detailed record of the Liu-kong-tsun Canal's irrigation area, showing the layout of its watercourses.
- • 1944 US Military Topographic Map - A wartime topographic survey recording the hydrological conditions of the time.
- • 1989 Topographic Map - Topography after modern urbanisation, by which point many watercourses had been culverted or rerouted.
Observations on hydrological change:
By comparing maps from different periods you can see how the land and waterways around the campus have changed over time.
🛰️ Satellite imagery
Live satellite imagery and environmental indices:
• Esri satellite imagery
High-resolution satellite imagery showing the actual landscape.
• Sentinel-2 true colour
The most recent true-colour satellite imagery, close to what the eye would see.
• Sentinel-2 vegetation index (NDVI)
Measures vegetation health and density. Colours correspond to:
• Sentinel-2 moisture index (MOISTURE-INDEX)
Measures moisture content in soil and vegetation. Colours correspond to:
🌳 Open data layers
Taipei City open data:
- • Street tree shade - Street tree canopy coverage (roadside trees only, not including parks)
- • Parks and woodland - Area-based green space such as parks, grass and woodland, filling gaps in the street-tree data
- • Pavement extent - Walkable pavement areas
- • Urban planning zones - Urban planning zones
🌡️ Temperature layer
A live temperature distribution map showing the urban heat island effect and temperature variation.
Changelog
Interactive Map · Version history
信水義河 Waters of Xinyi · NTU GIBP × Xinyi Community College