资讯

The Universal Transverse Mercator ("UTM") grid system is a locational device similar to latitude and longitude with great potential for precisely identifying historic sites in the U.S. and Canada. The ...
All of these features should be included on a map. These features are essential for understanding and using the map correctly. Maps are divided into a series of squares known as a grid. These grids ...
The authors describe the creation of a computer-readable database of spatially-referenced information from the Sites and Monuments Record (SMR) of the Historic Monuments and Buildings Branch (HMBB) of ...