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Analyze new results for TULIP2 (using PlanetLab Landmarks) with TULIP1 (Using only PingER landmarks). We have used Speed net sites as our sample data. The location of these sites is already known from Speed Net database. The results using TULIP1 (PingER only sites) can be downloaded here
North America
There are about 52 Speednet sites in North America region. We conducted some first using TULIP1 (PingER only landmarks). We have 10 PingER landmarks in North America region. Then we conducted some more tests using TULIP2 (using both Pinger and Planetlab landmarks). We used about 80 Planetlab landmarks in North America region. When we compared the two results. there were some obvious improvements in the results. The results can be found here Excel sheet can be downloaded here
Europe
There are about 52 Speednet sites in Europe. We also compared TULIP1 and TULIP2 for Europe and there were obvious improvements in the results. We have 8 PingER landmarks in Europe. We used 48 Planetlab landmarks in Europe. The results for Europe can be found here . The results can be downloaded here
Interesting Observations
While doing the analysis we came across an interesting result for a speed net site. We conducted the initial tests on 2nd January,2008. When we tried to locate http://www.g3pcs.com IP address 208.109.181.237 the three sites using for triangulation were Eugene_UnitedStates_PL 12.5ms Seattle_UnitedStates_PL 15.2ms and TRIUMF_Vancouver 19.1 ms. The Speed database showed that the site was in Ephrata, WA (Latitude:47.32 Longitude: -119.55). Although there was some Error distance but we believed the Speed Net database to be correct because Eugene,Seattle and Vancouver are close to Ephrata.
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