Table 1.

Characteristics of segments and image quality rated in CANVAS

A. Segment Characteristics		Mean	S.D.	Median	Min.	Max.	ICC
Number of steps		19.48	13.28	17	2	101	0.99
Percentage of steps obstructed(a)		26.98	27.10	20	0.00	100.00	0.10
B. Time to Rate (in minutes)		Mean	S.D.	Median	Min.	Max.	ICC
Entire segment		17.11	10.00	14.59	4.72	108.78	0.07
Building conditions module		4.68	4.46	3.88	0.77	78.08	0.03
Meta characteristics module		3.65	4.30	2.63	0.63	54.37	0.04
Land use module		2.22	2.12	1.48	0.27	12.15	0.00
Road and parking module		1.63	1.16	1.44	0.28	14.25	0.00
First intersection module		1.58	1.65	1.27	0.37	21.43	0.04
Sidewalk characteristics module		1.52	3.10	1.20	0.05	61.13	0.06
Pedestrian access module		1.38	1.29	1.00	0.25	11.23	0.00
Biking characteristics module		0.46	0.78	0.25	0.07	10.92	0.12
C. image Quality		Freq.	Pet.				ICC
Zoom level (number of clicks on zoom) where pixelation occurs							0.06
0		14	3.11
1		191	42.44
2		118	26.22
3		97	21.56
4		30	6.67
Legibility of street signs at initial zoom level							0.53(b)
Clearly legible		136	30.22
Blurry but legible		84	18.67
Unreadable		178	39.56
Camera technology							0.82(c)
Dark		319	70.89				(kappa)
Light		131	29.11

Notes:

^(a)2 of segments had percentage of obstructed streets greater than 100 and were set to missing

^(b)The category “No sign visible” not included in intra-class correlation analysis

^(c)Kappa valuereported because camera technology included only two response categories