Raster file formats software#

tfw for info).jpx can contain additional metadata. Sometimes includes an associated jpw (вЂњworld fileвЂќ) of the same basename (see. Uncompressed image data which, when associated in a directory with a tfw (вЂњworld fileвЂќ) of the same file basename, is a GeoTIFF, georeferenced image.Д¬ompressed image data often georeferenced. sbx, etc., which are often used for indexes or some other metadata Shapefiles can also include many other file formats such as. ItвЂ™s a plaintext file that can be read on its own. (Optional) Stores spatial reference and projection metadata. ItвЂ™s actually a tabular format called dBASE, which can be read on its own, in other programs. Shapefile data file which stores attribute data. Sometimes somewhat confusingly refered to a as a shapefile. When viewed in an ArcGIS filesystem dialog, is usually displayed as a single file. Is actually a collection of files, not a single file, all in the same directory, with the same file base name (the name without the extension). Has traditionally been the вЂњstandardвЂќ vector format for ArcGIS. Spatialite is an an extenion to sqlite which spatialally enables it. The File Geodatase is a directory, which contains many files which can not be read on their ownД®xtension is optional for this format, but is often. XML-based GPS data file, usually coming from a GPS device.Д®sri File Geodatabase can be used to store vector and raster data as well as more complex data containing topologies, and other supporting files. You can uncomrpess this with 7zip (free/open) and you will see plaintext KML Note: Esri has indicated that they will not be supporting the 'ESRI GRID' format in the future so it is not recommended.Is a XML-based plaintext file that may contain geometry, data, or a pointer to a web service The following formats are not really recommended for GIS data: However, we recommend converting data in these formats to IMG or TIFF if you are going to use them as part of a long-term project. The following formats are also used for raster data in GIS because they can be spatially referenced. The following file formats are the most common and are recommended for spatial data:

Raster file formats software#

Which ones you use will determine if the file can maintain a spatial reference and if the software you are using can open the file. There are hundreds of different raster file formats available. This means that as the resolution increases by a factor of 10, the number of pixels in the raster increases by a factor of 100! Raster File Formats goes from 100 meters to 10 meters), the number of pixels in the rasters increases in both the horizontal and vertical directions. The problem is that as the resolution of the pixels increases (i.e. The greatest challenge with raster data is it's size.

You must balance your application's need for spatial resolution with practical requirements for quick display, processing time, and storage. You might think we would always want to use the highest available resolution but the problem becomes the size and availability of the data. This means you can see large buildings, lakes, forest, and freeways in LandSat images but you would not be able to see a shack, a stream, a single tree, or a trail. The pixels within a raster are also referred to as 'Cells' and so the resolution of a raster may also be referred to as 'cell size'.Д¬ell size = Spatial Resolution: the dimension of the area covered on the ground and represented by a single pixel (e.g., 10m).ДЄ LandSat image has a resolution of 30 meters which means each pixel is about 90 feet by 90 feet square. One of the key issues with rasters is there 'resolution'. In a raster layer, the cells are arranged in rows and columns.ДЄll cells in a raster layer are typically the same size. Below is an example with a raster that contains elevation values in each of the pixels. This allows us to represent data that is uniform over the landscape. Uses grid cells of a given dimension to represent the value or attribute of a real world entity or phenomenon. What makes rasters unique from vector data is that rasters cover an area with a uniformly spaced grid of 'pixels'. Land cover: forest, rangeland, water, rock, etc.Rasters can represent a huge variety of data. Rasters are digital photosДЄt first, the photo appears to be continuous.Д«ut, as we zoom in, we begin to see that the photo is made up of thousands (or millions) of individual 'picture elements' or pixels.Д®ach of these pixels contains numbers that represent the amount (and color) of light that was captured by the camera and is now being emitted by the monitor. A raster image is the same type of image that you have been taking with a digital camera or your phone.