Raster objects are made up of pixels and are considered resolution dependent because they contain a fixed number of pixels that are used to create the image. They will lose quality if enlarged beyond the number of pixels needed in a particular use. Since there is a fixed and therefore a limited number of pixels, the image becomes fuzzy as it is enlarged.

A raster image is roughly equivalent to a newspaper photograph. If you look closely you see that it is made up of lots of small dots. The density of these dots is referred to by resolution, measured in dots per inch (stated as 'dpi'). Raster files are stored in many file formats, TIFF is a common example. Vectors are used to describe specific objects defining their size, position and geometry. The image seen on screen in a CAD application is only a visual representation of the vector file.

A raster map is a picture. Just like you have a picture on the wall, you have a picture on the screen. Each one of the pixel elements, or pixels, on the screen is just a representation of a picture. With a raster image you do not have any access to the objects in the picture, so if you have a picture of a coastline with bathymetry and buoy markers and shipping lanes, there is no way for you to select the shipping lanes, buoy markers or get a different type of coast line for that picture.

A vector image is constructed as a collection of abstract mathematical shapes, and these shapes preserve their identity when you scale the image or add or delete a shape. So, a vector image is resolution-independent. But rendering the image on a screen or a raster printer (both laser printers and ink-jet printers are raster printers) requires calculating an equivalent bitmap, which is slow.

Vector images are the best type of artwork to give your image the best look on both the screen-printed and embroidered work. A vector image is made up of lines which are a mathematical equation. The benefit of vector art is that it can be sized as big or as small as you like, but the capabilities in quality of vector art is limited. Raster images are different from vector art because the image is made up of small dots or pixel. Each pixel on the image has an actual defined color.

These terms are used to classify the type of data a graphics file contains. Raster files (also called bitmapped files) contain graphics information described as pixels, such as photographic images. Vector files contain data described as mathematical equations and are typically used to store line art and CAD information. Vector files have the additional capability of being scaleable meaning that ordinarily, no image editing is necessary.

If you have raster artwork (jpg, gif, psd, tif, bmp, Photoshop eps) or vector artwork with placed graphics, you can get the files converted into a useable format by CopyArtwork.Com for as little as $14.00. To get your art converted, visit CopyArtwork.Com by clicking the "Convert my file" link below CopyArtwork.Com will provide you an Illustrator file of your art in vector format. They will also provide a jpg for your viewing purposes only. Turnaround is 24-48 hours.

A raster map is a scanned image of a map, it allows viewing on a computer screen, vector data is designed for use in a Geographic Information System (GIS) it has been designed specifically for use on a computer where you can turn on and off layers/themes and interrogate the data.

Yes, this is a facility in TracTrix for CAD and is a handy way to check that the vectors represent the raster image.

Raster charts are simply a scan of an existing paper chart - they look like paper charts and give good detail. Raster charts supported by Deckman: ARCS, Maptech The information on vector charts is entered manually in layers which can then be turned on an off as required. Vector charts scale quickly and generally take up less disk space on your computer. Vector charts supported by Deckman: C-Map, Livechart.

Check out my AutoCAD Links Page, there are a number of freeware and low -cost converters listed there.

Check out my AutoCAD Links Page, for freeware and low cost programs that will allow you to do this yourself, however if you really want quotes for someone else to do this or have a large quantity then try:- I have recently upgraded from R14 to 2002 and find that when switching from paper space and model space in a viewport, it does a zoom extents as well! get the command prompt up start / programs /command prompt (this is windows nt it might be somewhere else on different operating systems) use .

Both vector and raster data are in the digital data sets. The vector data are included so that users who want to insert geologic features or parts of features into their own work can pick, choose, and manipulate the specific features they are interested in. The vector format permits a high degree of interaction and manipulation of the geology when using appropriate software. Raster data are from a scanned image of the vector data plotted at 1:24,000 scale and are in jpg format.

PDF supports both raster (bitmap) and vector (line) formats. When a PDF is created by printing from a vector-based application such as AutoCAD or an illustration program, the resulting PDF contains vectors describing all the lines, arcs, and shapes in the drawing. The output can be scaled with no loss of resolution, and viewers can zoom in on the lines in the drawing without seeing any 'jaggies".

If your picture changes for each form, you will need it in raster format. Our system is a template driven process and as such your original document can contain either vector or raster formatted images. To further explain, say your business cards require a picture of the employee. Your company logo is a vector art image. We would set the business card template with your logo already imbedded. Each time you create a new card you would upload a picture of the employee (.

Vector is the file format you use when the image is made with paths and fills, It's the only format you can cut vinyl from. Raster would be used for photos, complex images, gradation colors and all other images containing more than two or three colors. Raster images can only be printed. Vector images can be printed or computer cut.

The vector file format (SWF, AI, EPS or SVG), has the lines and shapes trasferred as mathematical deffinitions, unlike the raster files (BMP, JPEG or PNG) where they are series of pixels lined up in rows with color values applied to each individual pixel. The biggest difference is that the vector files are scalable and you can change their size without the loss of quality, while the raster files pixels cannot be streched without the siginificant quality loss.

Vector/Raster are the different ways a chart can be digitised (for computer use). A good analogy is if raster is a photograph of a house, then vector would be the architect's plans for the house. A photograph is simply a collection of coloured dots - our brain pieces these together and recognises walls, roof etc. With the architect's plans, a wall knows it is a wall and also knows all the individual pieces that are used to construct it.

A vector data model is based on points, lines, and areas defined by drawing boundaries around features and labeling or attributing them. The National Wetlands Inventory (NWI) is an example of a vector database. Environmental scientists manually delineate wetlands from aerial photography and attribute them with the type of wetland for use in vector-based geographic information system (GIS). The vector data format is well suited for representing linear features and the human landscape.

The raster image size is based upon the resolution (dpi) and the physical size of the image. The vector file size is based upon the number of vector entities required to represent the raster file. The relationship between the two varies with the content of the drawings, the entity types in the vector file, the raster format used and whether there is compression in the raster format.

There are advantages and drawbacks for methods using fully automatic conversion or interactive tracking. A good package should support all methods, including fully automatic vectorization, interactive tracing and easy-to-use heads up digitizing, in order to handle a wide variety of maps and drawings. All work is quoted upfront at no charge and is based on hourly rates. Volume discounts apply. Typical engineering or architectural drawings (D-Sized) range from $ 50 to $ 80 per sheet.

Raster data has many advantages over vector data. Raster data has a much greater level of detail of the physical environment than vector data since all features are shown at once. Vector layers may include roads or transmission lines while raster data will depict the exact dimensions of the roads or the trees surrounding a particular transmission pole. Humans manually create vector data while raster data illustrates the actual physical environment pixel for pixel.

There are a couple of ways. The best and quickest way, if you can open the file, is to zoom in on the edge of a letter. If you see lots of little squares (pixels or bitmaps), you have a raster file. If it looks clean like a line that you draw with a ballpoint pin, you more than likely have a vector file. The second way is to look at the file extension.

Raster files are excellent for visual purposes - after all they are a picture of the original image. Adobe Photoshop, Corel and other excellent raster editing softwares are available to enable you to edit raster images. However all CAD software (and some graphics drawing packages) use vector objects instead of rasters. The primary benefits are ability to precisely describe, create, scale and manipulate individual objects. There's also efficiency in storage and output to plotters or printers.

The raster image size is based upon the resolution (dpi) and the physical size of the image. The vector file size is based upon the number of vectors required to represent the raster file: Say the raster image is comprised of curved lines and the vectorizing software mode selected only creates vector files comprised of straight lines, arcs and circles. In this mode the resultant vectors of the curves have to be represented by an arc, or a line or a circle.

TracTrix can start with a raster image file from many different sources. Your, or your vendor's or your bureau's scanner(s) will produce a raster image file which TracTrix can work with.

algorithm in TracTrix is designed to seek the pixels in the raster image and 'follow' them according to the parameters set by the operator. These include following the edge line of pixels in the 'Outline following' mode or following the centerline of the selected line width of pixels in the 'Centerline following' mode. Additionally, TracTrix can be set optionally to create vectors as lines, arcs, circles, polylines, Beziers, NURBS or splines.

Currently, there is no way to convert a raster project into a vector project. This means there is no way to get rid of the bitmap. You need to export the information as a vector file (MIF, DXF) to "delete" the bitmap. If you just don't want the bitmap to show beneath the digitized objects, you can go to Image | Show Bitmap. The bitmap will still be there, but it will not be shown.