Table 2.

List of ideal and non-ideal search areas for radar and resistivity methods.

Search Area	GPR a	Resistivity b
Ideal	Flat	Hills/uneven
	Dry, sandy [115]	High saline, clay rich
	Clear surface/subsurface	Surface/subsurface with extraneous objects such as gravestones or rocks; tall/dense vegetation
	Freshwater [135,136]	Salt water [136,137]
Non-ideal	High saline, clay rich [115]	Dry, lacking moisture
	Surface/subsurface with extraneous objects such as gravestones or rocks; tall/dense vegetation	Uneven terrain c

^a– information sourced from Schultz [116] unless otherwise specified.

^b– information sourced from Moffat [109] and Pringle et al. [51] unless otherwise specified.

^c– resistivity methods can easily acquire data on uneven terrain, however, the trenching effect (defined as the unknown difference in electrical properties of disturbed versus undisturbed soil [138]) needs to be considered, as graves in these conditions can produce misleading anomalies [138,139].