Category Archives: Uncategorized

Surveying and Statecraft I

In several earlier posts, I discussed maps, map-making, surveying, and the tools and concepts necessary for the accurate measurement of land and geography to create accurate maps.  Along the way, I’ve mentioned cadastral (i.e. real estate) mapping, but mostly I’ve … Continue reading

Posted in Uncategorized | 1 Comment

Measuring Learning

Over the past year or more, I have read  a number of disturbing stories of school districts firing teachers and closing whole schools, for under-performing, as well as stories of school districts that have found and fired teachers who have … Continue reading

Posted in Uncategorized | Leave a comment

Marking Time (or at least calibrating it)

While I was reading some research material for the last post, I came across a statement that made me wonder: the statement was that the French group that went to Ecuador to measure the length of a degree at the … Continue reading

Posted in Uncategorized | Leave a comment

2 Geodetic Surveys

In the last post, I discussed some early surveying instruments: merkhet, plumb line, knotted ropes, groma, decempedae and dioptra.  Of these, the dioptra that was designed by Heron (also known as Hero) of Alexandria, and reconstructed by Schone, appears to … Continue reading

Posted in Uncategorized | Leave a comment

Surveying and Mapping

In the past few posts, I’ve been discussing maps and mapping.  I would like to build on those discussions by asking what would be needed in order to create a map.  To answer that question requires answering a few other … Continue reading

Posted in Uncategorized | Leave a comment

Round, round, get around, I get around

In the last couple of  posts, I’ve been discussing maps, mapping and the measurements required to construct maps.  I am going to continue by looking at using maps for only one of their purposes: to provide a guide for how … Continue reading

Posted in Uncategorized | Leave a comment

Considering Maps II – Virtual Lines

In the last post, I started discussing maps, mapping and the measurements required to construct maps.  I am going to continue, by looking at the coordinate system of longitude and latitude that Ptolemy refined and corrected, which is still in … Continue reading

Posted in Uncategorized | Leave a comment