constraints
[data models] Limits imposed on a model to maintain data integrity. For example, in a water network model, an 8-inch pipe cannot connect to a 4-inch pipe.
Constraints
The description of a spatial problem includes a section in which the known relationships existing between the objects are expressed.
SITE CONSTRAINTS
8-165. Survey-site selection and the route between rover stations to be observed are critical. All sites must have a clear view (a vertical angle of 15� or greater) of the satellites.
[edit] Constraints
Main article: Constraint
Constraints allow you to further restrict the domain of an attribute. For instance, a constraint can restrict a given integer attribute to values between 1 and 10.
Access Constraints: NONE
Use Constraints: NONE
Point of Contact:
Contact Information: ...
Sets of Constraints
Constraints are limits imposed on a model (network).
The constraints are the instantiations of the abstract class by concrete names, attribute values for Priority, Importance, Goal value, etc. and concrete methods e.g. computing the current value, the severity and proposing plan.
Conic constraints are relaxed by pseudoconic (with curved meridians) and polyconic (with nonconcentric parallels) projections. Conic and coniclike are among the oldest projections, being the base for Ptolemy's maps (ca. 100).
Coupling constraints (Torsten Hägerstrand) Reference to the need to join with other people, organizations or capital investments (as "bundles") to accomplish an objective (e.g. to have to rely on a bus and a freeway to reach a destination) [Goodall, ...
Bandwidth Constraints. The volume of data transmission constitutes a major consideration for OTA communications.
Three cost constraints provide the optimization model with cost parameters that control minimum and maximum budget levels for the analysis.
Specify constraints and reporting options:
The user can specify constraints such as a minimum system pressure so flushing will not allow the pressure to drop below a value specified by the user.
database literature
1) general description of sets of entities and the relationships between these sets of entities (Ullman 1982)
2) collection of object types, collection of operators on those object types and a collection of integrity constraints ...
Applying Attribute and Spatial Constraints
You may have noticed by looking at the object model diagrams for Table and FeatureClass that each of the methods used to return a cursor contains a parameter that specifies an instance of IQueryFilter.
However, existing data (maps and other forms) were usually created for some other purpose and thus have constraints for use in a GIS. This places much greater importance on evaluating and checking the suitability of source data for use in a GIS.
These constraints often mean that primary data must be collected and GPS is a logical choice.
Site Suitability Analysis - System having the means to understand the environmental constraints and opportunities of property.
Geospatial predictive modeling attempts to describe those constraints and influences by spatially correlating occurrences of historical geospatial locations with environmental factors that represent those constraints and influences.
"Stepping over the line: technological constraints and the new cartography," American Cartographer 15:311-9.
denormalization The process of restructuring a normalized data model to accommodate operational constraints or system limitations. densify A process of adding vertices to an arc at specified distances, without altering the arc's shape.
Now make a copy of the target with the grid points inserted and interpolate it, subject to certain constraints on the known data points.
Assign breaks and maximum drive-time constraints to drivers.
Calculate routes for delivery vehicles, honoring trucking restrictions.
Match customer needs with driver or vehicle specialties.
Account for vehicle capacities.
Our source for public accessibility will be the Protected Open Space Layer, which reveals the different public access constraints of various areas.
Well, every person has a dream of making a beautiful house of his own, but there are many constraints before you can really make your dream come true.
Other POES members have inclinations or other orbital constraints, such that they cross equivalent latitudes at different times of day, allowing observations over various times in the diurnal cycle.
In addition, the Internet has many limitations and constraints as a mapping environment.
This might be a problem for some map request services presenting data in an inappropriate projection or with strict constraints on cell aspect ratio.
OUTPUT FORMAT
Each tile is listed on a seperate line in the output.
As GIS specialists, our charge is to develop innovative technologies that are applied within current policy constraints. Just because a procedure is technically feasible doesn't mean it is automatically viable.
reactors require highly enriched fuel (sometimes Weapons Grade), but no moderating material (the enrichment process removes most of the U238 that captures fast neutrons). This type of reactor is used in mobile applications, where space constraints ...
Style Styles provide the mapping from feature types and feature properties and constraints to parameterized symbols used in drawing maps Styled Layer Descriptors (SLD) A map-styling language for producing georeferenced maps with ...
 See also: Information, Model, GIS, Environment, Software
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