At last week’s International Open Data day, over twenty volunteers came out here at the Washington DC Open Data Hackathon to map Kathmandu on OpenStreetMap in an effort to provide high-value base data for disaster risk management in one of the most earthquake prone areas of the world. This was in addition to over thirty mappers turning out in Kathmandu for a similar event, along with others who joined remotely from around the world.

Here are some statistics and pictures from this weekend.

Together, over 45 mappers in DC and Kathmandu created about 7,000 building footprints in 20 hours (*). This is a first phase of a project led by the GFDRR and OpenStreetMap Nepal that aims to collect important inventory data like building height and construction type for assessing earthquake damage risks. This first phase focuses on tracing building footprints from satellite imagery provided by Digital Globe and the State Department’s HIU. Subsequent phases will have ground surveys truth the data and add additional information.

Stats calculated from edits made between Feb 22-23

Distance mapped (m) Nodes Buildings (*) Roads User
2250.7 31425 52 0 Manoj-OSMNepal
447.3 26196 12 1 Helina
114009.5 14566 0 774 Rub21
296.8 10986 2 1 amritkarma
80259.5 10184 1730 16 jaldhaka
55378.7 5256 965 91 Divjo
46268.6 3508 903 2 crysb
3466.8 2417 37 0 Sazal(Solaris)
24395.5 2180 384 0 Rbanick
28076.1 2173 349 38 Marion Barry
26506.3 1795 288 13 lxbarth
9468.9 1753 210 0 paudel ananda
18311.6 1515 228 19 russdeffner
12229.7 1211 215 1 nsmith
17359.6 1163 0 79 palimpadum
14649.9 1101 268 7 Emily K Schwartz
45.7 837 1 0 OSMnec_Buddhalaxmi
7984.8 756 178 0 dud1
7254.4 626 157 0 LillianPierson
8379.7 602 71 28 mattmenefee
8272.3 584 0 1 ReindeerNinja
6066.8 581 125 0 OSMnec_yubrajgupta
6031.0 576 144 0 shazzie
6295.8 457 105 5 Patrick D
3535.9 440 76 0 OSMnec_Rk Raunak
7826.3 434 71 2 teddyumd
2673.8 252 51 0 anoreuil
2555.8 235 53 1 Willie_Theaker
3003.4 227 56 0 GeoBrando
1985.9 195 43 0 gkofia
2083.2 185 29 1 gnstiwari
963.1 175 4 1 OSMnec_sachis
1483.6 143 34 2 amitaksha
2646.9 127 0 18 dipson08
921.2 108 25 0 Pudasaini uttam
976.7 97 16 0 kamal11
397.6 84 15 0 mkapsoka
890.4 74 10 3 ericg
1108.6 63 11 0 Abhash
233.4 47 4 0 Tsunami Nabin
346.1 33 7 0 Niroj Panta
293.9 25 3 0 david nhemaphuki
295.4 21 4 0 aanand
348.2 19 5 0 Sushmita Timilslna
72.1 9 0 1 uafrazier
538,347.5 125,441 6,941 1,105  

(*) Ways tagged building=yes