Geographic Data Files or GDF is an interchange file format for geographic files. In contrast with generic GIS formats, GDF provides detailed rules for data capture and an extensive catalog of standard features, attributes and relationships.
Geographic databases (themes) can be used to solve problems like:
Site Location
Visualizing customer locations is critical to businesses trying to make better marketing decisions.
Geographic data describe entities which have a location. The geographic data includes the location information and other information about the entity of interest. This other information will be referred to as attributes of the entities.
Geographic data
There are two important components of geographic data: its geographic position and its attributes or properties. In other words, spatial data (where is it?) and attribute data (what is it?).
Geographic database - "A collection of spatial data and related descriptive data organized for efficient storage and retrieval by many users" (GIS Development, n.d.).
geographic data
A collection of data that is individually or collectively attached to geographic location.
Geographic Data
The locations and descriptions of geographic features. The composite of spatial data and descriptive data.
Geographic Database ...
geographic data set One of seven geographic data types supported by ArcInfo. Geographic data sets in ArcInfo include coverages, grids, DBMS tables, tins, images, lattices, and CAD drawings.
Geographic Data The composite locations and descriptions of geographic entities.
Geographic Database Efficiently stored and organized spatial data and possibly related descriptive data.
[edit] Geographic data model
A data model in information systems is a mathematical construct for representing geographic objects or surfaces as data.
geographic data storage, retrieval, and conversion
database management
statistical analysis ...
Geographic Data Sources and Attributes
Primary Data Collection
Direct environmental perception
Technology based data collection
Secondary Data Sources
Existing maps, photos, images
Digitized and scanned data
Tabular data-census ...
GEOGRAPHIC DATA
Any information which includes a description of a location on or near the Earth's surface. This may include generic descriptions, for example, place names or particular geological strata.
GEOGRAPHIC INFORMATION SYSTEM
See GIS.
Geographic Data Council
GDD
Graphics Data Display Manager; GIS Data Depot ...
Add geographic data while composing and positioning unit symbols.
Perform automatic stacking, decluttering of symbols, and placement of leader lines.
Import, locate, and display order of battle databases.
USGS Geographic Data Download
MapMart
The GISuser State Clearinghouse Directory ...
Since geographic data is rarely distinguished by regularly spaced shapes, cells must be classified as to the most common attribute for the cell. The problem of determining the proper resolution for a particular data layer can be a concern.
Federal Geographic Data Committee - United States federal government standards agency.
GITA - Geospatial Information & Technology Association.
GIS Lounge - Informational site on GIS.
GISWiki.NEWS.
Seamless geographic database - The method of organizing geographic data in such a way that the data physically stored as individual files, known as tiles, can be retrieved as if they were in one single file or database.
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Given that geographic datasets are primarly concerned with spatial references, we really must have metadata (data about the data) describing the coordinate system that is embedded in the files.
State Soil Geographic database (STATSGO) was digitized from 1:250,000-scale topographic maps, on which a generalization of the detailed soil surveys was mapped.
Grid: A geographic data model representing information as an array of equally sized square cells arranged in rows and columns. Each grid cell is referenced by its geographic x,y location.
The National Geographic Data Framework (NGDF), recently established in the UK, is producing a series of guidelines for the definition and storage of spatial data such that it has maximum potential for future use.
State Soil Geographic Database (STATSGO) State general soil maps made by generalizing the detailed soil survey data.
Views display geographic data organized by theme. A theme is a set of related features, such as nations, districts, cities, streets, parcels, utilities, or bus routes, along with the attributes for those features.
GIS organizes geographic data into a series of thematic layers and tables. Because data in a GIS are referenced to geography, they have real-world locations and could overlay one another.
Collection of Geographic Data
Obtaining data to insert into a GIS is a large subject in itself that includes a number of different approaches. One of the most common ways to collect spatial geographic data is to perform a physical survey.
North Carolina Geographic Data Clearinghouse (NCGDC)
The North Carolina Geographic Data Clearinghouse is part of a national effort to identify and share the rich digital data resources being produced by governments, universities, utilities, ...
Contribute your geographic data content. Let ESRI publish and host your authoritative content as part of a community basemap that GIS users can access freely through ArcGIS Online as a map service.
Input
Before geographic data can be used in a GIS, the data must be converted into a suitable digital format. The process of converting data from paper maps into computer files is called digitizing.
A coordinate based geographic data structure (in contrast to raster)often used to represent linear features.
About Get Data Links
Find your watershed ...
Typical sources of geographic data for computer manipulation include digitized maps, field survey data, aerial photographs (including infrared photographs), and satellite imagery. Most image data are collected using remote sensing techniques.
Spatial Data: A geographic dataset which is a collection of data that are individually or collectively attached to geographic locations, such as points, lines, or polygons.
Digital Geospatial Metadata - DGM: DGM was approved in June 1994 by the Federal Geographic Data Committee (FGDC). DGM describes the specifications for the content, quality, condition, and other characteristics of metadata.
A standard vector format developed by the US Federal Geographic Data Committee.
Recorded x, y coordinates of a location are cross-referencing between a standard reference grid and non-geographic data such as addresses or zip codes to accurately map that location. In order to geocode, a geocoding service must first be defined.
18 a collection of related geographic data. Depending on context, a layer may have some specific relationship to other layers. For raster imagery, a layer can represent one sensor in a multispectral array.
We are rapidly approaching a time when the GIS as a primary processor of geographic data is no longer what traditionally was, ...
All geographic data can be reduced to three basic topological concepts; the point, the line, and the area. A label is also needed to identify what the entity is.
You should see a table with 7 columns, each describing to the PostgreSQL system the location and storage of geographic data within the database.
Maps and geographic data capture the essence of the geographically particular, the boundary conditions that influence the outcome of physical and social processes; and in that sense GIS illuminates the particular.
The transform function using the results of the recognize transforms the geographic data into the format of the particular system. At this point we should make some brief comments referring to (Sárközy 1996) for more details.
edu Distribution_Liability: WAGDA provides these geographic data "as is." WAGDA makes no guarantee or warranty concerning the accuracy of information contained in the geographic data.
The Internet has introduced a new dimension in the use of geospatial information by coupling fast and widespread dissemination of geographic data with accessible GIS tools.
Census TIGER 2007-1992, Environmental Systems and Research Institute (ESRI) Streetmap, Geographic Data Technologies Dynamap 2000 and Navigation Technologies. These data sets were provided by the U.S. Census or purchased from commercial vendors.
Viewing and printing geographic data at user designed scales and sizes.
Searching and selecting geographic features of interest based on subject queries, logical queries, arithmetic queries, and spatial relationships.
A Geographic Information System (GIS) is an organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, ...
[map design] The arrangement of elements on a map, possibly including a title, legend, north arrow, scale bar, and geographic data.
[ESRI software] In ArcGIS, a presentation document incorporating maps, charts, tables, text, and images.
Tile - the spatial unit by which geographic data is organized, subdivided, and stored in a map library. Tiles subdivide the area covered by a map library and organize the library data by location (e.g.
Geocoding is the process of finding associated geographic coordinates (often expressed as latitude and longitude) from other geographic data, such as street addresses, or zip codes (postal codes).
Geographic data and related tabular data can be collected in-house or bought from a commercial data provider. Most GISs employ a DBMS to create and maintain a database to help organize and manage data.
To enlarge and display greater detail of a geographic data set.
Web Site © 2009 Northrop Grumman. All rights reserved.
Data and Maps © 2009 The Maryland-National Capital Park & Planning Commission. All rights reserved.
There are three categories of spatial modeling functions that can be applied to geographic data within a GIS: geometric models, such as calculating the distance between features, generating buffers, calculating areas and perimeters, and so on; ...
The translation of continuous geographic data into discrete 2D maps invariably conjures up artful interpretation.
This metadata satisfies the requirements of the Federal Geographic Data Committee (FGDC), as augmented by additional elements defined by ESRI. It is provided for all datasets with a Status of Available.
DC GIS ...
Check out the Surface of the Earth Icosohedron Globe at the National Geographic Data Center at NOAA There is an initial $5 charge but each globe is only $0.50.
Map Projection Related Amusements ...
Our GIS services allow for the visualization of geographic data, analysis of spatial relationships, and efficient data management.
Open GIS Consortium
FreeGIS: Free Software and Geo-Data.
Federal Geographic Data Committee (USA)
Resources (University of Oregon Libraries)
Edinburgh GIS Server Home ...
These digital cartographic and geographic data may also be used as one layer in a geographic information system (GIS), as a tool for various kinds of spatial analyses, and as information for plotting base maps.
In this context of indirect exterior vision via screens, augmented reality consists of enriching the video image presented to the driver with data extracted from the geographic database of the site, ...
 See also: Geographic, Information, GIS, Database, Analysis
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