Evidence for validity of five secondary data sources for enumerating retail food outlets in seven American Indian Communities in North Carolina

Table 1 Geographical and ground-truthing descriptions for each of the seven participating American Indian tribes, 2009-2010

	Sappony	Waccamaw Siouan Tribe	Occaneechi Band of the Saponi Nation	Meherrin Indian Tribe	Haliwa-Saponi Indian Tribe	Coharie Indian Tribe	Lumbee Tribe of North Carolina	Totals
ZIP Codes overlaying with SDTSA¹	1	7	5	4	10	8	43	78
Counties overlaying with SDTSA¹	1	2	3	2	5	3	9	21 ²
Total miles of roadways within SDTSA³	100	97	135	110	305	455	238⁴	1440
Miles covered ground-truthing within SDTSA	116	43	120	90	275	659	199⁴	1502
Days spent conducting primary ground-truthing data collection	1	1	2	2	2	7	5	20
Outlets identified through primary ground-truthing	5	6	13	62	31	315	234	666
Additional outlets identified through ground-truthing for inter-rater reliability analysis⁵	0	0	0	2	1	5	4	12
Closed outlets	0	0	1	2	3	7	8	21
Total outlets	5	6	14	66	35	327	246	699

¹Using ArcGIS 9.3.1, ZIP Code and county boundaries were overlayed with State Designated Tribal Statistical Area (SDTSA) boundaries to determine NC ZIP Codes and counties intersected or co-located with the SDTSA.
²Four counties co-located with two tribes and were therefore only counted once in the total county count.
³Determined in ArcGIS using TIGER/Line 2009 summaries of all primary (S1100), secondary (S1200), and local (S1400) roads.
⁴Only focused on two United States Census Designated Places with the SDTSA.
⁵10% of six of the SDTSA areas and one of the two United States Census Designated Places was driven during the inter-rater reliability process; one area was driven over two visits while the rest was driven during the one and only visit.

ISSN: 1479-5868