Geospatial Data Formats Quiz

Study Notes

Geospatial Data Formats and Representations

Polygon features describe enclosed geographic areas such as dams, lakes, and country boundaries, and are created from vertices connected with a continuous line.
Raster data is composed of pixels associated with specific geographical locations and can be converted to raster data through rasterization, while vectorization converts raster data to vector data.
Essential vector data formats include Shapefile (SHP), Keyhole Markup Language (KML), AutoCAD Drawing Exchange Format (DXF), Comma Separated Values (CSV), Geodatabase (GDB), and OpenStreetMap (OSM).
Important raster data formats include Portable Network Graphics (PNG), JPEG, Tag Image File Format (TIFF), GRIDs, IMG, and USGS Digital Elevation Model (DEM).
Vector data advantages include complete topology, efficient storage, high spatial resolution, accuracy, and aesthetically pleasing representation, while its disadvantages include complexity, time-consuming editing, poor storage of continuous data, and incompatibility with remote sensing data.
Raster data advantages include a simple data structure, ease of simulation, good performance in representing continuous features, and compatibility with remote sensing and aerial images, while its disadvantages include difficulty in representing small objects, large storage needs, challenges in representing topological connections, and potential accuracy issues.
Raster data is made up of pixels, represents continuous data, and requires greater storage, while vector data is made up of a series of X,Y coordinates, represents discrete data, and requires little storage space.
Raster data depends on pixel size for resolution and represents data in cells or grid, while vector data doesn't depend on pixel size for resolution and represents data using vertices.
Raster data results in larger file sizes, representing maps such as Elevation Map and Slope Map, while vector data results in smaller file sizes, representing points, lines, and polygons.