![]() Interpolation tools: Kriging, IDW, Splines, etc.The following are examples of tools in ArcMap will convert rasters to vectors or vectors to rasters: Expected types of analysis: some tools only work with raster or vector data.Available storage: some rasters are really large.Other factors that can influence your decision include: When topology is needed for the analysis.Spatial detail is important (When "close enough" isn't really good enough).Working with discrete data types: trees, buildings, property boundaries.Working with continuous data types: elevation, slope, satellite photos.Issues include:Ĭhoosing Between Data Models "Raster is faster but vector is corrector" Whenever you convert data from raster to vector or vector to raster, you will degrade the data by some amount. The image below looks very similar to the one above but now the watersheds are represented as rasters. The "Feature To Raster" tool will convert these polygons to rasters. Issues include: Loss of detail Loss of accuracy Stair stepping (raster to vector) Changes to the original data Choosing Between Data Models 'Raster is faster but vector is corrector' This is a common saying in GIS. You can convert data between rasters and vectors but the nature of the data will be very different.īelow is an example of watersheds in Humboldt County represented as Shapefiles. Whenever you convert data from raster to vector or vector to raster, you will degrade the data by some amount. You'll want to select the data type based on the nature of the data and the analysis you want to perform on it. pdf.Many features can be represented as rasters or vectors. Used when graphics are required in different scales, but always in the highest quality.Ĭommon file formats.Vector graphics are particularly suitable for displaying geometric designs and figures, logos, icons, pictograms, technical illustrations, product illustrations, fonts and the creation of layouts.The more extensive a vector graphic, the more time this process takes. To depict a vector graphic, the image must first be rendered.For high-quality results appropriate editing programs as well as special knowledge and skills are necessary.Detailed images can be difficult to display as vector graphics due to the many different shapes and colours.Converting a vector graphic into a raster image is much easier than the other way around.Changes such as size, colour, position are easily possible at any time. can be easily, flexible and precisely edited and adjusted. The characteristics of lines, curves, areas etc.Vector graphics can be upsized or downsized as desired, their high quality is maintained. The main advantage is the continuous and lossless scalability.These parameters define exactly the objects that make up an image or graphic. starting point, length, direction, colour etc. The shapes are described by certain parameters, e.g. Vector graphics consist of geometric shapes such as lines, curves, circles, and polygons. online monitors, digital cameras.Ĭommon file formats. ![]() Ideal for complex, highly detailed and true-colour images and graphics with lots of information, such as photographs.Vector images are much more scalable than Raster images. Raster images have a wide range of colour gradations and less scalable than Vector images. ![]() Vectors are small files that contain information on Bezier curves that form the drawing.
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