Page 487 - Green - Maritime Archaeology: A Technical Handbook. 2nd ed

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Index
Research design (continued) safety, 21–22
site research, 18–19
staff, 20–21
Resection, in sextant survey, 34–35, 37 Rhinoceros software
characteristics, 207–208 overview, 201–202
and PhotoModeler, 156f
for stereophotography, 201–202 Tektash site, 202f, 203f
for Tektash site stereophotography, 194f
wire-frame image, 209f
Right angle survey, 94–95
RMS, see Root-mean-square
ROB, Rijksdienst voor het Oudheidkundig
Bodemonderzoek, 142–143
Roman Bridge at Maastricht, HPASS survey
overview, 142–143 processing in field, 144–145 system deployment, 143–144
Root-mean-square
definition, 148
Site Surveyor accuracy, 125–126 Site Surveyor suspect measurement
identification, 129 stereophotography data processing,
195–196
ROVs, see Remotely operated vehicles
S
SA, see Selective availability
Safety, in research, 21–22
Salvage work, 5
Santa Maria de la Rosa wreck site, 161 Santo Antonio de Tanna wreck site
distance-angle measuring system, 93f grid frames in excavation, 238
photo tower, 183f
work platforms, 249f
Sapporo Maru wreck site, 79, 80f Satellite geometry, in GPS, 49
Satellite shading, in GPS, 49
Saxon Sutton Hoo site, 351
Scale positioning, in artifact photography,
334–336
Scales, in field photography, 224–225 Scanners, high-resolution, for shading,
315–316
Scanning sonar, for searches, 74–75
Scientific dating
artifacts in post-excavation research,
349
in post-excavation research, 350–351
Scuba equipment, 5
Search patterns, and transits, 31, 33 Search and survey
aerial photography, 61
echo sounder, 74
local knowledge, 84–86 magnetometer, 62–73 multibeam sonar system, 75–76 overview, 23–24
position fixing
double theodolite system, 40 electronic systems, 41
general considerations, 24
Global Positioning System, 43–50 photographic angle measurement,
38–40
radar, 42–43
sextant survey, 34–37
theodolite and distance measuring
system, 41 Total Station, 42 transits, 24–34
with remotely operative vehicles, 58–60
scanning sonar, 74–75 side-scan sonar, 76–81 sonar mosaic, 81–82 sub-bottom profiler, 82–84 submersibles, 57–58
visual search techniques circular search, 55 GPS search, 57 overview, 50–51 swim-line, 51–54 towed search, 55–57
Selective availability, GPS history, 45 Sextant survey
angle resectioning, 42f
basic principles, 34–37 fundamentals, 35f
operation at sea, 37f resection strengths, 34–36f, 37
Shading
in artifact drawing
effective shading, 315 high-resolution scanners, 315–316