Table 1.

Summary statistics for the positional error (in meters) of street geocoded locations of school children in Orange County, Florida.

Sample	Min	Max	Mean	SD	Median	90th %	95th %	99th %
Complete sample (n = 104,865) – distance to parcel centroid
Offset 8 meters	1	32,356	66	435	41	100	137	273
Random sample (n = 1,000) – distance to structure location
Parcel centroids	0	136	6	10	3	10	15	47
Offset 0 meter	17	3,367	61	115	43	102	138	292
Offset 10 meters	8	3,367	56	116	39	99	135	284
Offset 20 meters	0	3,367	52	117	37	99	133	284
Offset 30 meters	1	3,368	52	117	36	100	137	280
Offset 40 meters	2	3,368	56	116	38	103	138	275
Offset 50 meters	2	3,369	61	115	43	105	140	279