mad4: Spatial data: borders of selected districts of Madagascar.mad0: Spatial data: national borders of Madagascar.initGrass: Initialize GRASS session and import raster and/or vector(s).fragmentation: Calculate fragmentation indices for a raster.fasterVectToRastDistance: Distance between raster cells and nearest spatial point.fasterVectorize: Convert a raster to a vector (points, lines, or polygons).fasterTopidx: Generate topographic wetness index raster.fasterTerrain: Calculate raster slope, aspect, curvature, and partial.fasterSurfFractal: Generate a raster with a fractal pattern.
fasterSun: Calculate solar radiance and irradiation.fasterRasterize: Rasterize using a call to GRASS GIS.fasterRaster: fasterRaster: Faster raster processing in R using GRASS GIS.fasterRastDistance: Distance distance between cells with 'NA's and closest.fasterQuantile: Compute quantiles for a raster.fasterProjectRaster: Project and resample a raster.fasterMapcalc: User-defined calculations on a single raster.fasterLongLatRasters: Calculate longitude and latitude rasters.fasterHorizon: Calculate horizon angle height raster.fasterFragmentation: Calculate fragmentation indices for a raster.fasterFocal: Multi-core version of the focal() function.fasterConvertDegree: Convert degrees between cases with 0 = north and 0 = east.fasterContour: Calculate contour vectors from a raster.fasterCalc: Apply a formula to each cell of a raster.fasterBufferRast: Add a buffer to a raster.faster: Generic function to call a GRASS module.exportVectToGrass: Write vector to an existing GRASS session.exportRastToGrass: Write raster to an existing GRASS session.dot-getCores: Calculate number of cores to use for multi-core functions.dot-fragDensity: Calculate density (pf, or proportion of cells occupied) from.dot-fragConnect: Calculate pff (connectivity between cells) of a binary matrix.dot-fragClassify: Classify fragmentation from density (pf) and connectivity.Vector illustrations are great for logos, illustrations/artwork, animations, and text. Typically vector art is created in illustration applications such as Adobe Illustrator or CorelDRAW.
#PIXLR CONVERT RASTER TO VECTOR SOFTWARE#
All Microsoft Office clipart uses vector art and most charts and graphs produced by Office or by statistical analysis software are vector-based. So, what types of graphics would typically be vector? Well, almost all computer font files are based on vector images of the letters - that's why it's possible to scale them WAY up or WAY down and still have the letters be clear. If you want to make the circle bigger, you just increase the value of r - instead of having to keep track of tons more pixels, the computer just has to keep track of a different number. If you remember back to your high school geometry, the equation for a circle of center ( h, k) and radius r is (x - h) 2 + (y - k) 2 = r 2. One of the greatest things about vector images is that you can re-size them infinitely larger or smaller, and they will still print out just as clearly, with no increase (or decrease) in file size. Generally speaking, vector images are made up of paths or line art that can infinitely scalable because they work based on algorithms rather than pixels. Instead of trying to keep track of the millions of tiny pixels in a raster image, vector images, or line art, keep track of points and the equations for the lines that connect them. This is a common problem but can be remedied by using raster image editing programs such as Photoshop to change resolution and properly scale images.Ĭommon Raster Image Types: JPG, TIFF, GIF, PNG, BMP This is because we are stretching the pixels over a larger area, thus making them look less sharp. As you may have guessed, the more pixels in the image and the higher the resolution is, the higher quality the image will be.įor example, if we scale a raster image to enlarge it, without changing resolution, it will lose quality and look blurry or pixilated. The number of pixels that make up an image as well as how many of those pixels are displayed per inch, both determine the quality of an image. Since raster images are pixel based, they are resolution dependent. Raster images are compiled using pixels, or tiny dots, containing unique color and tonal information that come together to create the image. These are the types of images that are produced when scanning or photographing an object.
Raster (or bitmap) images are generally what you think about when thinking of images.
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