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Note that HERE %iles are interpolated values, not necessarily observed in samples #897

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Note that HERE %iles are interpolated values, not necessarily observed in samples #897

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Note that HERE %iles are interpolated values, not necessarily observe…
Nate-Wessel Mar 5, 2024
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Merge branch 'master' into here-interpolates-percentiles
Nate-Wessel May 6, 2024
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4 changes: 2 additions & 2 deletions here/README.md
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Expand Up @@ -106,8 +106,8 @@ Historical data are acquired through the Traffic Analytics download portal. Data
| stddev | numeric(4,1) | | standard deviation of the observed speed(s) |
| min_spd | integer | | Observed minimum speed |
| max_spd | integer | | Observed maximum speed |
| pct_50 | integer | | Observed median speed |
| pct_85 | integer | | Observed 85th percentile speed - use with caution as sample sizes (of vehicles) are very small within 5-minute bins |
| pct_50 | integer | | Median speed. Likely to have been interpolated between adjacent values rather than actually observed in the sample! |
| pct_85 | integer | | 85th percentile speed - use with caution as sample sizes (of vehicles) are very small within 5-minute bins. This value may also be interpolated. |
| confidence | integer | | proprietary measure derived from `stddev` and `sample_size`; higher values mean greater 'confidence' in reliability of `mean` |
| sample_size | integer | | the number of probe vehicles traversing a segment within a 5-minute bin **plus** the number of 'probe samples' |

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