Ad
related to: shapefile shapes
Search results
Results From The WOW.Com Content Network
The shapefile format was introduced with ArcView GIS version 2 in the early 1990s. It is now possible to read and write geographical datasets using the shapefile format with a wide variety of software. The shapefile format stores the geometry as primitive geometric shapes like points, lines, and polygons.
One "shapefile" usually include four different files : .shp, .shx, .dbf, .prj. First three files must all be present in order to use the data. Each shapefile can hold only one geometry type. The projection information contained in the .prj file is critical in order to understand the data contained in the .shp file correctly.
The Vector data model uses coordinate geometry to represent each shape as one of several geometric primitives, most commonly points (a single coordinate of zero dimension), lines (a one-dimensional ordered list of coordinates connected by straight lines), and polygons (a self-closing boundary line enclosing a two-dimensional region).
Shapefile – open, hybrid vector data format using SHP, SHX and DBF files (by ESRI) Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk ) TIGER – Topologically Integrated Geographic Encoding and Referencing
A shape-"file" actually consisted of several files, including at the very least a .shp file to store the geometry, and a .dbf file for the attributes, the latter directly adopting the dBase format that was the dominant microcomputer database at the time (despite it being a proprietary trade secret, the .dbf format had been legally reverse ...
The TIGER/Line shapefile data includes complete coverage of the contiguous United States, Alaska, Hawaii, Puerto Rico, the U.S. Virgin Islands, American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the Midway Islands.
Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.
The vector logical model represents each geographic location or phenomenon by a geometric shape and a set of values for its attributes. Each geometric shape is represented using coordinate geometry , by a structured set of coordinates (x,y) in a geographic coordinate system , selected from a set of available geometric primitives , such as ...