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Questions and Answers
What type of data is represented by 'Vector' in GIS?
What type of data is represented by 'Vector' in GIS?
What is the characteristic of 'Point' in vector data?
What is the characteristic of 'Point' in vector data?
What type of data is represented by 'Raster' in GIS?
What type of data is represented by 'Raster' in GIS?
What is the characteristic of 'Polygon' in vector data?
What is the characteristic of 'Polygon' in vector data?
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What are essential vector data formats?
What are essential vector data formats?
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What are important raster data formats?
What are important raster data formats?
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What are advantages of raster data?
What are advantages of raster data?
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What are disadvantages of vector data?
What are disadvantages of vector data?
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How is raster data composed?
How is raster data composed?
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What do polygon features describe?
What do polygon features describe?
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What does vectorization convert?
What does vectorization convert?
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What does rasterization convert?
What does rasterization convert?
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What are the advantages of vector data?
What are the advantages of vector data?
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What are the disadvantages of raster data?
What are the disadvantages of raster data?
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What does vector data represent?
What does vector data represent?
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What is a characteristic of raster data?
What is a characteristic of raster data?
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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.
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Description
Test your knowledge of geospatial data formats and representations with this quiz. Explore the differences between raster and vector data, understand essential formats for each, and grasp the advantages and disadvantages of both data types.
