Which file format is commonly used to store vector data in GIS?

• A. Geodatabase (.gdb)
• B. Binary (.bin)
• C. Shapefile (.shp)
• D. Comma-Separated Values (.csv)

Answer: (C)

The shapefile format, denoted by the extension .shp, is one of the most widely used formats for storing vector data in Geographic Information Systems (GIS). This format consists of multiple files that collectively hold the spatial geometry and attribute information necessary to represent geographic features such as points, lines, and polygons.

Shapefiles are particularly popular due to their compatibility with many GIS applications and their relatively simple structure, which facilitates the sharing and analysis of vector data. Each shapefile typically includes several associated files, such as .shx (shape index file) and .dbf (attribute data file), which work together to provide a comprehensive dataset. This organization allows for robust visualization and manipulation of geographic data, making the shapefile an essential format in the GIS field.

While other formats mentioned, like geodatabases or CSV files, have their specific uses, they do not primarily serve as the standard for storing vector data in the same way as shapefiles do. Geodatabases are more suited for larger datasets and complex relationships, while CSV files are predominantly used for tabular data without inherent spatial attributes.