Please check the box if you want to proceed. Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings. A compliance framework is a structured set of guidelines that details an organization's processes for maintaining accordance with Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business Remote access is the ability for an authorized person to access a computer or a network from a geographical distance through a Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United Medical practice management MPM software is a collection of computerized services used by healthcare professionals and A crisis management plan CMP outlines how to respond to a critical situation that would negatively affect an organization's A business continuity plan BCP is a document that consists of the critical information an organization needs to continue A kilobyte KB or Kbyte is a unit of measurement for computer memory or data storage used by mathematics and computer science Megabytes per second MBps is a unit of measurement for data transfer speed to and from a computer storage device.
This was last updated in March By Margaret Rouse. Login Forgot your password? Forgot your password? No problem! Submit your e-mail address below. We'll send you an email containing your password. Your password has been sent to:. Please create a username to comment. Search Compliance risk management Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.
Search Security remote access Remote access is the ability for an authorized person to access a computer or a network from a geographical distance through a Search Health IT telemedicine telehealth Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the Project Nightingale Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United Search Disaster Recovery crisis management plan CMP A crisis management plan CMP outlines how to respond to a critical situation that would negatively affect an organization'sIt is produced in multiple scales in support of systems with map.
The following products are not stocked by Mapping Customer Operations and must be acquired via automatic distribution:. DCG features include important buildings, airfields, military installations, industrial complexes, embassies, government buildings, hospitals, schools, utilities, and places of worship. A guide to numbered buildings and an index to street names are provided in the margin. DCGs can be used for mission planning and navigation. CIB is an unclassified seamless dataset of orthophotos, made from rectified grayscale aerial images.
It supports various weapons, C4I theater battle management, mission planning, digital moving map, terrain analysis, simulation and intelligence systems. CIB data are produced from digital source images and are compressed and reformatted to conform to the raster product format standard. It may be derived from a grayscale image, from one band of a multispectral product, or from an arithmetic combination of several multispectral bands.
Applications for CIB include rapid overview of areas of operations, map substitutes for emergencies and crisis, metric foundation for anchoring other data in C4I systems or image exploitation, positionally-correct images for draping in terrain visualization, and image backgrounds for mission planning and rehearsal.
This catalog is produced every days. There are currently two Compact Disc CD versions and two downloadable versions available. These versions are described below:. DTED is a uniform matrix of terrain elevation values. It provides basic quantitative data for all military systems that require terrain elevation, slope and gross surface roughness information.
Data density depends on the level produced. VMap Level 0 is the low resolution component of the VMap family of products. VMap Level 0 is a comprehensive ,scale vector basemap of the world. Vmap Level 1 contains medium resolution data at thescale. Data is separated into ten thematic layers consistent throughout the VMap program.I have always been interested in computer graphics and their applications. Data representation and visualization is one of the main areas of HCI Human Computer Interactionand the better you make the interaction between a machine and a human, the more productivity will be generated by both the human and the machine.
I had some experience with OpenGL during my undergraduate studies while attending the California Polytechnic University. Unfortunately, I never got a chance to pursue the more advanced features of the OpenGL library, given my time and work responsibilities. You can find more about OpenGL at www. There are also a bunch of good literature available on the topic of Computer Graphics and OpenGL that you can refer for further advancements. The following project is a very simple example demonstrating how to generate a terrain based on a bitmap file.
The objective of the project is to generate a three dimensional terrain based on some data file. Please note, that this could have been any data file, but for the purpose of our example, we are going to be using a 32x32 dimensional bitmap file. We could have easily used a text file, and defined logic for each word or letter to represent it graphically. The project also contains a good Windows framework that can be used for your other OpenGL applications.
Coastal Changes and Impacts
The current project allows you to rotate the camera using your mouse. Once again, this is a simple approach to terrain generation, which can be a very difficult task in complex environments.
Since Computer Graphics is kind of an advanced topic, it is necessary to have at least some king of understanding and exposure to the concepts and theories in the field. However, this does not mean that you will not be able to use the following code or understand it.
I have made it as simple as possible, and hopefully, it will give you a good start, or some additional source of information that you can use for your projects. Some background information on a terrain and their uses in a game application: A terrain in an environment is one of the most critical components in the scene that is being rendered.
It could easily be the largest 3D object in the project. Rendering the terrain can become a daunting task, taking the most time to render in a scene. To keep the terrain engine running in real time can be a difficult task, and it requires some thought out processes and modeling for it to be sufficient. To be effective, the terrain needs to meet a number of requirements, many of which can be contradicting each other. A terrain should appear to be continuous to the end user, yet the mesh should be simplified or culled where possible, to reduce the load on the graphics card.
In a gaming system, for example, some engines draw the terrain just beyond the point a player can reach, and then use a terrain drawn onto a skybox to simulate hills or mountains in the distance. The terrain should appear realistic to the setting for the environment, yet this can be taxing on the video card, and a balance needs to be maintained.
Detail textures are often used close to the camera, allowing the areas further off to be rendered more quickly. The first thing required for terrain rendering is a representation of the terrain's shape. While there are a number of structures that can be used to perform the job, the most widely used is the height map. Others include: NURBS, which can be maintained through a number of control points, and voxels, which allow for overhangs and caves. There is one drawback to a height map, and that is, for every point on the XZ-plane, there can only be one height value.
You can see that this limits the representation of overhangs and caves by a height map. This can be overcome by using two separate models.Science Explorer.
Frequently Asked Questions. Multimedia Gallery. Park Passes. Technical Announcements. Employees in the News. Emergency Management. The U. Since the time GTOPO30 was completed, the availability of higher-quality elevation data over large geographic areas has improved markedly. GMTED provides a new level of detail in global topographic data. The GMTED product suite contains seven new raster elevation products for each of the, and 7. The new elevation products have been produced using the following aggregation methods: minimum elevation, maximum elevation, mean elevation, median elevation, standard deviation of elevation, systematic subsample, and breakline emphasis.
Metadata have also been produced to identify the source and attributes of all the input elevation data used to derive the output products. Many of these products will be suitable for various regional continental-scale land cover mapping, extraction of drainage features for hydrologic modeling, and geometric and radiometric correction of medium and coarse resolution satellite image data.
In areas where new sources of higher resolution data were available, the GMTED products are substantially better than the aggregated global statistics; however, large areas still exist, particularly above 60 degrees North latitude that lack good elevation data.
Additionally, the viewer may be difficult for some users to interpret. In addition to the elevation products, detailed spatially referenced metadata containing attribute fields such as coordinates, projection information, and raw source elevation statistics have been generated on a tile-by-tile basis for all the input datasets that constitute the global elevation model. Inthe U. Because no single source of topographic information covered the entire land surface, GTOPO30 was derived from eight raster and vector sources that included a substantial Skip to main content.
National Geodetic Survey Data Explorer
Coastal Changes and Impacts. Year Select Year Apply Filter. Date published: December 11, Date published: July 13, Adobe PDF files support 3D features and surfaces. Global Mapper v The archive will be extracted and any recognized files will be loaded automatically. In addition to the height matrix, 3 additional matrices provide information which identifies the source of the data, the estimated vertical accuracy of the data and the confidence in this accuracy assessment.
Global Mapper v6. Global Mapper v9.USGS EROS - How To Search and Download Satellite Imagery
With v In Global Mapper v ASTER represents a revolution in the remote sensing community because of the availability of its imagery and its superior resolution. ASTER resolution ranges from 15m to 90m, depending on the wavelength.
These files are usually accompanied by a header file of some kind usually. Global Mapper requires this header file in addition to the. Globl Mapper v The CoRTAD contains a collection of sea surface temperature SST and related thermal stress metrics, developed specifically for coral reef ecosystem applications but relevant to other ecosystems as well.
Schlumberger GeoFrame Home Page. The DEM consists of an ordered array of ground elevations providing coverage of the entire Canadian landmass. It has been derived from the cells of the CDED at the scale. Canada3D is available in two forms: grids regularly spaced at 30 or arc-seconds. The CDED consists of an ordered array of ground elevations at regularly spaced intervals.
Nearly complete coverage of Canada is available. There is a new format used by the Carlson software. The Cogent3D. The DHM format is a digital height model used by the Swiss government.
Grid resolutions available include 0. For data coverage for each resolutions see Related URLs below. The E57 file format is a compact, vendor-neutral format for storing point clouds, images, and metadata produced by 3D imaging systems, such as laser scanners.
Typical imagery includes satellite data as well as land coverages. For multi-band images and grayscale images, Global Mapper will automatically apply a two-standard deviation contrast stretch in order to generate an aesthetically pleasing image with no intervention.
If present, the first 3 bands will be used the generate the image, with band 1 being red, band 2 being green, and band 3 being blue. The objective of the Soil Moisture CCI is to produce the most complete and most consistent global soil moisture data record based on active and passive microwave sensors. The zLas Lidar format is produced by Esri. GGMplus provides computerised gravity field maps at 0. The zero- and first-degree harmonic coefficients in the synthesis were assumed to be zero.Users can find products in the following steps.
Find Products. Users can customize the start-up view by appending parameters to the URL. The following are some of useful examples:. Mobile View. Date Range. Start Date. End Date. Map Indices. No Results. How to Find and Download Products.
Select Datasets Users can select one or more datasets. When the checkbox next to the dataset name is checked, more options appropriate for each dataset are displayed under "Product Search Filter". These options include sub-categories, file formats and data extent.
Select desired options. Product Availability and Preview layers are provided for some datasets. Select a polygon by clicking it on the map. The selected polygon will be highlighted. Open the product list by clicking "results" next to the product count. Users can display the footprint and thumbnail of one or more products, view metadata, directly download the file or add to a Cart. Show Example. Parameters Usage category Dataset categories used for product search.
This extent will be used for product search.
Opening a DTED File
Dataset categories used for product search. Basemap displayed on the map. Map extent.Documentation Help Center. To be removed Read U. Use readgeoraster instead. For more information, see Compatibility Considerations. The file is selected interactively. This function reads the DTED elevation files, which generally have file names ending in.
If not found, the file may be selected interactively. When samplefactor is 1 the defaultDTED reads the data at its full resolution. When samplefactor is an integer n greater than one, every n th point is read.
The limits must be two-element vectors in units of degrees. The foldername input is a string scalar or character vector with the name of a folder containing the DTED folder. Within the DTED folder are subfolders for each degree of longitude, each of which contain files for each degree of latitude. The U. Department of Defense, through the National Geospatial Intelligence Agency, produces several kinds of digital cartographic data. The data is available as 1-by-1 degree quadrangles at horizontal resolutions ranging from about 1 kilometer to 1 meter.
The lowest resolution data is available to the public. Certain higher resolution data is restricted to the U. Department of Defense and its contractors. DTED Level 0 files have by points. DTED Level 1 files have by The edges of adjacent tiles have redundant records. Maps extend a half a cell outside the requested map limits. The 1 kilometer data and some higher-resolution data is available online, as are product specifications and documentation.
DTED files are binary. No line ending conversion or byte-swapping is required when downloading a DTED file. First, import the elevation data. Associate the elevation data with geographic locations by creating a geographic postings reference object. To create a reference object, specify the latitude limits, longitude limits, and size of the elevation data grid.
Create a set of map axes, then plot the data using geoshow. Display a colormap appropriate for elevation data using demcmap. In order to retain square output cells, this function reduces the latitude sampling to match the longitude sampling.
For example, it will return a by elevation grid for a DTED file covering from 49 to 50 degrees north, but a by grid for a file covering from 50 to 51 degrees north.
If you call dted specifying arbitrary latitude-longitude limits for a region of interest, the grid and referencing vector returned will not exactly honor the limits you specified unless they fall precisely on grid cell boundaries. Because grid cells are discrete and cannot be arbitrarily divided, the data grid returned will include all areas between your latitude-longitude limits and the next row or column of cells, potentially in all four directions.
DTED files contain digital elevation maps covering 1-bydegree quadrangles at horizontal resolutions ranging from about 1 kilometer to 1 meter. When encountered, these null data values are converted to NaN.
This difference affects the decoding of negative values, and incorrect decoding usually leads to nonsensical elevations. Thus, if the DTED function determines that all the nonnull negative values in a file would otherwise be less thanmeters, it issues a warning and assumes two's complement encoding.
Raster reading functions that return referencing vectors will be removed, including dted.