A comparison of raster-based point density calculations to vector-based counterparts as applied to the study of food availability

Table 1 A comparison figures for all the availability measures

Measure	Point Density	Drive Time	Join Count	Buffer (3 Miles)	Euclidean distance	Store density by area	Store density by population
Point Density	–	0.70	0.22	0.78	0.71	0.81	0.69
Drive Time	0.70	–	0.25	0.60	0.73	0.69	0.61
Join Count	0.22	0.25	–	0.22	0.25	0.19	0.22
Buffer (3 Miles)	0.78	0.60	0.22	–	0.59	0.70	0.81
Euclidean Distance	0.71	0.73	0.25	0.59	–	0.70	0.56
Store density by area	0.81	0.69	0.19	0.70	0.70	–	0.70
Store density by population	0.69	0.61	0.22	0.81	0.56	0.70	–
Average (AVG)	0.65	0.60	0.23	0.62	0.59	0.63	0.60
AVG without Join Count Jaccard Index	0.74	0.67	–	0.7	0.66	0.72	0.67

ISSN: 2048-7010