Esri grid file extension

Created by NGA. ECW is a propriatary format. It is a wavelet-based, lossy compression, similar to JPEG When ENVI works with a raster dataset it creates a header file containing the information the software requires. This header file can be created for multiple raster file formats. A proprietary raster format from ER Mapper. Produced using the ER Mapper image processing software. Provides a method for reading and displaying files that are not otherwise supported by another format but are formatted in such a way that the arrangement of the data can be described by a relatively small number of parameters.

By creating an ASCII file that describes the layout of the raster data, it can be displayed without translation in a proprietary format. Esri Grid. A proprietary Esri format that supports bit integer and bit floating-point raster grids. Grids are useful for representing geographic phenomena that vary continuously over space and for performing spatial modeling and analysis of flows, trends, and surfaces such as hydrology. Esri Grid stack. Used to reference multiple Esri Grids as a multiband raster dataset.

A stack is stored in a directory structure similar to a grid or coverage. Esri Grid stack file. A stack file is a simple text file that stores the path and name of each Esri Grid contained within it on a separate line.

Format used for storing data representing n-dimensional arrays of numbers, such as images. Uses container files directories containing files and directories to manage the data objects. The geodatabase is the native data structure for ArcGIS and is the primary data format for representing and managing geographic information, such as feature classes, raster datasets, and attributes.

The file geodatabase is a collection of various types of GIS datasets held in a file system folder. A floating-point file is a binary file of floating-point values that represent raster data.

It allows a virtual dataset to be derived from other datasets that GDAL can read. A bitmap image format generally used for small images. The gridded binary format is used for the storage, transmission, and manipulation of meteorological archived data and forecast data. A self-defining file format used for storing arrays of multidimensional data. This is a compressed heightfield format used to support terrain data as a raster. Raw SRTM height files containing elevation measured in meters above sea level, in a geographic projection latitude and longitude array , with voids indicated using File format used by WinDisp 4.

Versions 2 and 3 are supported. Byte, and 32bit unsigned integer, and bit floating point. Intergraph's proprietary format for bit imagery CIT.

Intergraph's proprietary format for 8-bit unsigned imagery COT. Level 1. A standard compression technique for storing full-color and grayscale images. ArcCatalog only recognizes the.

A compression technique especially for maintaining the quality of large imagery. Allows for a high-compression ratio and fast access to large amounts of data at any scale. The tile size for these files must be a multiple of by pixels. The projection for these files is WGS When the file is ordered using littleendian, the file extension is BLX.

If bigendian is used, the file extension is XLB format. PCRaster's raster format. You cannot build pyramids or calculate statistics.

It should not be used for any analysis or processing. MRF is a technology developed by NASA that combines raster storage with cloud computing for tiling, indexing and multiple resolutions support.

It is a raster storage format, but also a tile cache format for web services and a dynamic tile cache for another raster. A proprietary compression technique especially for maintaining the quality of large images. Allows for a high compression ratio and fast access to large amounts of data at any scale. Generation 2 and generation 3—limited to 1 or 3 bands. Will be rendered as a raster. View files can be used to define how the point cloud data will be viewed. A collection of standards and specifications that allow interoperability in the dissemination of imagery and its metadata among various computer systems.

Developed by the NGA. PCI Geomatics raster dataset format. PDS version 3 is supported. Provides a well-compressed, lossless compression for raster files.

It supports a large range of bit depths from monochrome to bit color. Its features include indexed color images of up to colors and effective percent lossless images of up to 16 bits per pixel. Select the. Sandia National Laboratories created a complex image format to accommodate the data from its synthetic aperture radar. The purpose of this format was to transfer digital geospatial data between various computer systems in a compatible format that would not lose any information.

Widespread use in the desktop publishing world. It serves as an interface to several scanners and graphic arts packages. TIFF supports black-and-white, grayscale, pseudo color, and true color images, all of which can be stored in a compressed or decompressed format.

The Terragen Terrain file was created by Planetside Software. It stores elevation data. This format consists of a raster grid of regularly spaced elevation values derived from the USGS topographic map series. For more details on specific formats, see www. TOC file cannot be copied and pasted since it requires a specific folder hierarchy and references to other files.

Feedback on this topic? Grids also carry additional information, such as the coordinate system associated with the grid. Grids are implemented using a tiled raster data structure in which the basic unit of data storage is a rectangular block of cells.

Blocks are stored on disk in compressed form in a variable-length file structure referred to as a tile. Each block is stored as one variable-length record. The size of the tile for a grid is based on the number of rows and columns in the grid at the time of creation. The upper limit on the size of a tile is set by the application and is very large currently set at 4,, x 4,, cells.

As a result, most grids used for GIS applications are automatically stored in a single tile. The spatial data for a grid is automatically split across multiple tiles if the size of the grid at the time of creation is larger than the upper limit for the size of a tile. The blocked storage organization for grids supports both sequential and random spatial access to large raster datasets. The blocking structure imposes no restrictions on the joint analysis of grids.

Tiles and blocks from different grids also need not coincide in map space for joint analysis. The tile and block structure of a grid is completely hidden from the user, who always creates and manipulates a grid as though it were a seamless raster of uniformly square cells.

Grids use a run-length raster compression scheme that is adaptive at the block level. Each block is tested to determine the depth bits per cell to be used for the block and to determine which storage technique cell by cell or run length coded is more efficient. The block is stored in the format that requires less disk space. The adaptive compression scheme is the optimal choice because of its ability to efficiently represent both homogeneous categorical data and heterogeneous continuous data while supporting joint analysis using both types of data.

Single layer per-cell operations, such as data reclassification, operate directly on runs of data without decompression. Multilayer per-cell operations on compressed input layers intersect runs of data from the different layers and operate on the intersected runs. Single-layer per-neighborhood operations and multilayer per-cell operations that mix compressed and uncompressed data expand runs into cells and perform traditional cell-by-cell processing transparently.

The tile-block structure of a grid is also transparent to any application programs that access the spatial data in a grid. Programs that manipulate grids access the spatial data by setting a rectangular window defined in map coordinates. A grid is stored in an ArcInfo workspace.

The grid, like a coverage, is stored as a separate directory with associated tables and files that contain specific information about the grid.

In an integer grid directory originally created by ArcInfo Workstation , the following tables and files are found: the BND table, which stores the boundary of the grid; the HDR file, which stores specific information describing the grid, for example, cell resolution and blocking factor; the STA table, which contains statistics for the grid; the VAT table, which stores the attribute data associated with the zones of the grid; the log file LOG , which monitors the activity that has occurred on the grid; and the tile file w Some of these, such as the log file, may not exist if created using ArcGIS operators.

If a grid is altered, the values and information contained in the files and tables are updated immediately. The information contained in an INFO table is accessible to the user and provides information about the grid. Join the conversation. Please share your information and our sales team will contact you soon.

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