Yongha Hwang @pathoverlap

Ann Arbor, MI Joined June 2014

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Yongha Hwang @pathoverlap

5 years ago

Green Wall between NKorea - SKorea. Nothing but green! ... and mines.

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Yongha Hwang @pathoverlap

5 years ago

Korean Peninsula. 1956 Geologic map on SRTM. QGIS + Blender.

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Dispersing Employee Workstation Locations with Simulated Annealing. Red dots in the image are SA dispersed locations. The cost function is minimum nearest neighbor distance. @PerryGeo's simanneal was used for SA. Jupyter Notebook here: github.com/yonghah/workst… #geopandas #PySal

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Yongha Hwang @pathoverlap

7 years ago

Metro-line overlaid on #rayshader rendering of Seoul github.com/yonghah/raysha…

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Yongha Hwang @pathoverlap

8 years ago

Bike rider detector with Tensorflow object detection API. Trained with ~400 scraped images. Training took ~3hr with AWS p2.xlarge instance. goo.gl/xWb8YQ

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Yongha Hwang @pathoverlap

8 years ago

Pedestrian volume estimation with deep learning (Tensorflow object detection api). Compared to NYC's field count dataset (114 locations), we've got r=0.73. Codes are here: goo.gl/XpnQxd

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Yongha Hwang @pathoverlap

8 years ago

Identified most populated (GHSL) 1km square in a city with its name. inspired by @undertheraedar. See Jupyter Notebook here: goo.gl/FGZ64M

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Yongha Hwang @pathoverlap

8 years ago

Asst prof's salary by department in UM Ann Arbor shows academic hierarchy.

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Yongha Hwang @pathoverlap

8 years ago

Visualize estimate and confidence intervals on a choropleth map goo.gl/VmBFjt

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Yongha Hwang @pathoverlap

8 years ago

scrape GIS features directly from ArcGIS server to R's simple features. github.com/yonghah/esri2sf #simplefeatures

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Yongha Hwang @pathoverlap

8 years ago

1person-1dot map of Metro Seoul. Red dots for 20s. White dots for other ages. #datashader goo.gl/JvPKT4 (in Korean)

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Yongha Hwang @pathoverlap

9 years ago

Population density by census tract in Seoul-Incheon area. 20 mil people live here.

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Yongha Hwang @pathoverlap

9 years ago

Compare urban morphology across cities by just typing in city's name. Scale is maintained same across maps. goo.gl/NPi14P @Mapbox

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Yongha Hwang @pathoverlap

9 years ago

Age and density of all 660K buildings in Seoul, www-personal.umich.edu/~yonghah/seoul… vividly showing the necessity of data cleaning. Data from KOR gov.