![]() ![]() Further, the method by which the elevation grid data is sampled from the underlying terrain surface can introduce additional error for the stored elevation values. However, using integer values can cause the elevation grid cells to have an elevation error of ± 1 foot (or meter) when compared to using floating point numbers. Integer numbers require 2+ bytes for storage, whereas floating point numbers require 4+ bytes. To save storage space and memory, many elevation grids store only integer values (i.e., 1217) to represent the ground elevation rather than floating point values (i.e., 1217.42). Joe Berry, “Beyond Mapping”, GeoWorld, January 2003
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |