dataset precision
[data quality] The mathematical exactness or detail with which a value is stored within a dataset, based on the number of significant digits that can be stored for each coordinate.
Network datasets are well suited to model transportation networks. They are created from source features, which can include simple features (lines and points) and turns, and store the connectivity of the source features.
Sampling Raster Dataset using Points
Before we can sample the raster data using this points set, we must install the Point sampling tool plugin for QGIS.
Creating Feature Datasets & Vector Editing
Discussion
Most of the projects you will encounter will include data that have already been developed. However, sometimes you may need to create new datasets or alter existing datasets.
Dataset: A named collection of logically related data records arranged in a prescribed manner.
Demographic: Data characteristics of human populations, such as size, growth, density, distribution, and vital statistics.
Dataset Construction
The Caucasus team made a major effort (especially Russian members) to provide useful thematic data from both published and non-published sources.
GIS Datasets are complex. They should be moved and renamed only with ArcCatalog
Even though we may refer to GIS datasets with simple names like Shape File or grid or coverage these are not simple when we look at them in the filesystem.
Datasets and software are released on an annual basis. Typically, we release a data update to include newly updated datasets, such as businesses, shopping centers, streets, locators, and demographics.
Dataset Alignment-- When datasets are sufficiently misaligned, an initial alignment process is required to allow more precise conflation to be carried out.
A dataset, in image format, that can be placed over others.
Peripheral Device
A hardware device not part of the central computer. Examples are digitizers, plotters, and printers.
"a dataset that uniquely defines and locates residential, business and public postal addresses in Great Britain.
GIS dataset A collection of related digital files containing a particular set of GIS data. The terms GIS dataset and GIS database are sometimes used interchangeably.
This dataset is the map collection. Tactical Pilotage Charts are 1:500,000 scale maps that are nominally meant for air navigation purposes.
XData Dataset
The DeLorme file (.dds) that is created after importing a database file using the XData tool. By default, the XData dataset will be linked to the current Project or Map File.
XMap ...
Updated Dataset. OCX will bring better situational awareness to all GPS users. A robust and rapidly updated information set is expected to become available publically, both directly from OCX and through the Coast Guard Navigation Center (NavCen).
Integrated Dataset for North America (Rand McNally)
IDOT
Illinois Dept. of Transportation ...
You may either create a DataConnetion object and use it to connect to a database to find GeoDataset objects, or you may interactively select data through the map control's property sheet.
Available - The dataset is available in the Data Catalogue for distribution internally and externally.
Development - OCTO is developing and processing the data to prepare for its active use; it is not available for distribution.
A summary of the dataset records used to develop the predictive models is shown in Table 1. The first five entries identify a customer and their derived grid cell location in the analysis grid.
The integrity of a dataset is a measure of its utility. Graphically, database integrity means that the dataset is maintaining its connectivity and topological consistency.
Example (Slovakia3d dataset):
v.info -c precip3d v.vol.rst -c input=precip3d wcolumn=precip segmax=700 cvdev=cvdevmap tension=10 v.db.select cvdevmap v.univar cvdevmap col=flt1 type=point ...
Digital Number (DN) In image processing, the value of each pixel in a dataset. Usually these values are 8-bit, that is ranging from 0-255.
Feature classes can be found in a feature dataset where the same coordinate system can be shared and organized into a geometric network that can maintain topological relationships between its feature classes.
data update cycle Source: GETIS glossary Data update interval dataset series Source: ISO 19115; ISO 19113; ISO 19114 Collection of datasets sharing the same product specification datum Defines the origin, ...
agf - Atlas GIS native binary geodataset file
ain - attribute index file
aih - attribute index file
alg - ER Mapper algorithm
aml - ARC/Info AML file
apr - ArcView Project File (ODB format)
avl - legend template file (ODB format) ...
HYDRO 1k Elevation Derivative FREE GLOBAL Datasets...
Public Data Sets on Amazon Web Services
Global 30 Arc-second Elevation Data : GTOPO30
GeoNetwork - The portal to FREE spatial data and i...
Global Map and Data from International Steering Co...
Removed the TIGER 1992 - 1998 street reference datasets.
Removed the process step of geocoding to the original addresses first.
Updated the zip code data to 2006.
Updated the County parcel centroids.
For example, reasoning that a land cover type classified as Deciduous Needleleaf Trees in one dataset is a specialization of land cover type Forest in another more roughly-classified dataset can help a GIS automatically merge the two datasets under ...
However, this level of access does not allow the user to change the dataset. To request a change to a dataset, contact a team member with Editor or Team Data Administrator access.
International Dataset Guides (CIESIN) -- World resources; US national, social and environmental databank; EuroMab ACCESS; world tables; global population database; etc.
The user decides which topology rules are important for his dataset.
The user has to specify the conditions of the dataset.
The user decides what should happen with spatial objects if they do not meet all the conditions.
Manage the integrity of parcel data (including record information from deeds and survey plans) in a cadastral fabric dataset.
Many of you will need digital elevation models or digital terrain elevation datasets (DTEDs) in your work. Using them is straightforward: each cell contains an elevation from which you can compute all kinds of surface properties.
Traditionally, digitizing has meant the creation of a spatial dataset from a hardcopy source such as a paper map or a plan.
The ArcGIS interface in SewerGEMS allows GIS professionals to leverage ESRI's geodatabase architecture to guarantee a single dataset for modeling and GIS.
profiles over the raster datasets. Note: To allow ArcView to query the raster datasets we had to generate a generalized 1 x 1 degree point file to hold the raster values.
Accuracy is an issue pertaining to the quality of data and the number of errors contained in a dataset or map.
Quadtree A spatial index that breaks a spatial dataset into homogenous cells of regularly decreasing size. Each decrement in size is 1/4 the area of the previous cell.
In the last few years many different geoid solutions were determined for the area of Hungary, using different datasets, and methods [2-4].
A tabular database manager used by ARC/INFO to store attribute and relational datasets.
INFO Tables
Individual files directly or indirectly related to geographic datasets (map layers) which store attribute data.
On typical raster datasets, the "Calculate from Extent" option of the "Scene Properties" (under the "View" menu) works fine, but here is went too far.
The class assignments have been designed to use small (relative to most GIS projects) datasets, that require little personal space; however, ...
Trivia.
Can you identify this projection and the dataset used? Information and graphic are kindly provided by Paul B. Anderson. Solution
Return to The Map Projection Home Page ...
GIS and related technology will help analyze large datasets, allowing a better understanding of terrestrial processes and human activities to improve economic vitality and environmental quality.
We have extensive experience with local, regional and federal datasets.
This includes visual inspection, as well as investigating how the data is organized (its schema), how well the data corresponds to other datasets and the rules of the physical world (its topology), ...
An image from other sources, such as aerial photo or satellite image, can be easily draped on to a 3D dataset to create realistic 3D display. The 3D DEM is fully compatible with USGS (United States Geological Survey) DEM format.
certain meteorological presentations since linear parallel spacing make easy comparing latitude effects; constant scale on parallels help measuring main wind speeds. Finally, areas are preserved so comparing choropleths and other color-coded datasets ...
It will include a powerful GIS software product, sample datasets, exercises suitable for use with Geography students and comprehensive supporting documentation
GIS III - course material from The University of Adelaide ...
Layer: A usable subdivision of a dataset, generally containing objects of certain classes, for example rivers, roads or buildings.
Raw DataThis could be PAF and/or Postzon or another dataset in a fixed width or csv format.
 See also: Information, GIS, Geographic, Model, Feature
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