32402f10 - Introduction to Archaeology: Class 10 Data...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction to Archaeology: Class 10 Data without digging: Mapping, surface collections and remote sensing Copyright Bruce Owen 2002 Thomas jumps right from finding sites (site survey) to using high-tech remote sensing and then digging. This leaves out two essential steps that are very frequently used much cheaper and often easier (at least the field part) very informative that is, mapping the site, and then making and analyzing surface collections Mapping A whole range of methods, from by-eye sketch diagrams to high-tech 3D modeling Pace-and-compass, or tape-and-compass mapping measure your stride so that counted paces can be converted to meters or feet or use long measuring tapes (50 meter or 100 meter are typical) record angles and lengths of line segments between major "control" points in closed loops control points are fixed features of the site, like the tip of a big rock, the corner of a building, etc. closing allows you to see how far off the measurements are and distribute an adjustment around all the angles equally then measure in additional features relative to the control points Grid mapping with long tape measures or theodolite another approach is to lay out a rectangular grid across the site, and map in features relative to the grid points the grid can be laid out using long tapes and a few right angles right angles can be determined by compass or by measuring right triangles (using known ratios of lengths of right triangles, like 3:4:5, or 1:1:1.414 the grid can also be laid out using a theodolite: a small telescope mounted on a tripod with very accurate scales that let you measure horizontal and vertical angles theodolites are often used with stadia rods: essentially a very long ruler that is held on a given spot the farther away the stadia rod is, the more of the "ruler marks" appear in the view of the theodolite this can be used to calculate how far away the stadia rod is, without having to stretch a tape to every point Standard mapping with a theodolite and stadia rod set up the theodolite in one, central spot have the "rod man" stand the stadia rod on each point of interest measure the distance to it using the stadia markings measure the horizontal angle using the angle ring on the theodolite record these two values and/or directly plot them on a map Plane table mapping
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Archaeology F 2002 / Owen: Surface collections, remote sensing p. 2 same idea as standard theodolite and stadia rod mapping, but the telescope sits on a flat, rectangular plate, resting on a flat table with paper attached to it and a small pin sticking up in the center, through the paper point the telescope at the stadia rod standing on the point of interest rest the edge of the flat plate against the pin draw a line along the edge of the plate; it points straight to the stadia rod measure the distance using the stadia markings multiply that measurement by the map scale, then measure along the line on the paper to directly plot the point.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/02/2012 for the course ANTHRO 324 taught by Professor Bruceowen during the Fall '02 term at Sonoma.

Page1 / 5

32402f10 - Introduction to Archaeology: Class 10 Data...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online