Page 178 - Green - Maritime Archaeology: A Technical Handbook. 2nd ed

Chapter 4: Conventional Survey 157
surement points. This is contrary to the interpoint system which becomes less efficient as the number of points increases (as described previously). Additionally, HPASS will work in poor or almost zero visibility and. Table II summarizes the conclusions, but processing was common to all systems with differences in time. This information has also been included.
Finally, one important addition to processing data in this manner is the ability to extract the information in a three-dimensional graphical format. Thus a DXF format allows these data to be imported into a wide range of two- and three-dimensional packages such as AutoCAD and Rhino. Figure 4.30 shows a DXF export in Rhino viewed from the perspective viewpoint.