block group
[federal government] A unit of U.S. census geography that is a combination of census blocks. A block group is the smallest unit for which the U.S. Census Bureau reports a full range of demographic statistics.
Block IIR lifetimes and GPS sustainment
by Willard Marquis, J. David Riggs
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A census block is the smallest geographic unit used by the United States Census Bureau for tabulation of 100-percent data (data collected from all houses, rather than a sample of houses).
Block Groups These areas are supposed to contain approximately 1200 people, but the actual count of people per block group varies widely. All of the short and long-form data is summarized at the block-group and tract level.
Block (Tax) - A group of municipal tax lots that can be isolated from other parcels by a boundary, usually a roadway, waterway or properly labeled lot line.
Block Feature: Aggregation of primitive spatial features grouped together to represent a single spatial feature, typically in the form of a symbol within a spatial database.
Block Length
The size of a block measured in the number of characters, words or records it contains.
Blow Patch ...
GPS Block IIR
The IIR series were produced to replace the II/IIA series as the II/IIA satellites gradually degraded or exceeded their intended design life. The "R" in Block IIR stands for replenishment.
Fault Block Mountain:
A mountain mass created either by the uplift of land between faults or the subsidence of land outside the faults.
Dynamic Blocks - Powerful, flexible, intelligent blocks enable the user to reduce the number of blocks to manage and maintain.
Block Island is a smaller version of Martha's Vineyard in Massachusetts in that it has permanent residents, residents in summer homes, and many tourists.
3. Block and lot numbers and, if scale permits, names and boundaries of subdivisions and plats
4. Boundaries of political subdivisions, for example, county, town and municipality ...
City block modeling-quantity takeoff and cost estimation based on unit price
City block modeling with color-coded space utilization
City block modeling in hybrid environment with raster image ...
Yes. Block interpolation is available for all interpolation methods, and the results of block interpolation can be saved to raster.
Does ArcGIS Geostatistical Analyst support barriers?
Centre block of Parliament Hill.
In addition to being the capital of Canada, Ottawa is politically diverse with regard to local politics.
earlier blocks (1972-1980) were based on the North American Datum of 1927 (NAD27);
blocks completed between 1980 and 1989 were based on the MAY76 adjustment of NAD27;
everything completed since is on the North American Datum of 1983 (NAD83).
Same - no blocks here either. Everything is well worded and functional as described.
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Great job! This is exactly what I needed! ...
range from blocks to states
as noted previously, the geographic boundaries and definitions of these areas may change from one census to the next
Availability of Census data ...
foot wall block The body of rock that lies below an inclined fault plane. compare hanging wall block ...
The foundation block of a cadastre is the cadastral plan (or survey plan). This is produced by a registered/licensed surveyor who accurately measures and records the boundaries of each property.
The Building Blocks
The PCRaster spatial modelling language is an extension of the ideas behind Map Algebra and the Cartographic Modelling Language proposed by Berry and Tomlin (Berry 1987, Tomlin 1990) but includes new ideas of iterations used ...
Census Block: The smallest geographical area, bounded by visible boundaries, for which census data is collected.
Census Tract: A small, permanent statistical subdivision of an area, normally with homogeneous characteristics.
Fault-Block Mountain:
A linear mountain that is bounded on both sides by normal faults.
Faunal Succession:
A principle of relative dating that is based upon the observed sequence of organisms in the rock record.
A division of a block.
LIBER
The designation of the book in which the recorded deed information for the property is located.
(v.) A fracture, or large crack, in the Earth's crust where one side moves up/down/sideways relative to the other; fault block- n. pieces of crust that have slipped into or alongside a fault; fault zone- n. an area with multiple faults.
A font pattern is the basic building block for markers and text symbols. Foreign Key In a relational database management system terms, the item or column of a data that is used to relate one file to another. Format 1.
5-minute blocks. Each product provides the same coverage as a standard USGS 7.5-minute quadrangle without over edge. Coverage is for Southwestern Washington up through part of the Puget Sound Basin.
Reverse Fault This vertical fault develops when compressional force causes the displacement of one block of rock over another. Revolution See Earth revolution.
land=string] [blocking=string] [threshold=integer] [max.slope.length=float] [accumulation=string] [drainage=string] [basin=string] [stream=string] [half.basin=string] [visual=string] [length.
TIGER files contain street address ranges along lines and census tract/block boundaries. This descriptive data can be used to associate address information and census/demographic data with coverage features.
Block (Survey Attribute) A block is a defined set of original land surveys. A block has an identifying name and/or number, and surveys within it are usually consecutively numbered, mile-square sections.
The Large Object (LOB) data types store blocks of such rich and unstructured multimedia data in the Oracle database. Oracle9i supports two types of LOB: ...
New 'Regroup' function for 'Text Blocks'. If you use the OCR functions, the new 'Regroup' command will allow you to enter a distance value to regroup text blocks. You have options to regroup 'All' or 'Single Text Blocks'.
For example, if one has geographic data that includes detailed demographic information, one can determine how many individuals of a certain age, income, and ethnicity live in a given street block.
The recording should be centered in the block and on the bottom line of the block. All figures must be neat and legible. There should be no erasures or obscuring of the original figures.
A Flat File stores a single map value for each grid element in a map block. The individual records can explicitly identify each grid element (grayed columns-"where") along with the attribute (black column-"what").
The data records are a series of fixed-length blocks containing the data. The data are in ASCII format: you can easily read them with a text editor if you can separate them from the header and field descriptor that precede them.
Access to the MathWorld website will be blocked to subnets violating these terms. Indiscriminant use of prefetching results in bandwidth degredation for other MathWorld users and may violate the above proscription against bulk downloading.
NIMA has never released its DTED1 series of DEM data and in fact is doing its best to block NASA from releasing 30m SRTM data from the Space Shuttle. (Quote from the NASA SRTM website:"Following the events of Sept.
It includes block level maps of every village, town, and city in the United States. It includes geocoded block faces with address ranges of street numbers. This means than that they include topology and can address match.
A technique known as Helmert blocking was employed to provide a simultaneous least-squares adjustment of all observations to minimize mathematical distortions in the resulting coordinate information.
Block Group - Subset of a Census Tract containing a population of approximately 800 inhabitants.
Census Block - Subset of a Block Group, the smallest geographic area for which census data are collected.
For example, if we have exported a comprehensive object like a block consisting of houses as instances but our GIS uses the single object conceptual model then the transform should complement all instances (houses) with a table value (or empty link) ...
The TIGER files provide vector data for hydrography, transportation, political, and statistical areas (such as county, incorporated area, census tract, and census block).
The accompanying illustration (fig. 22) depicts the blockage of the road network that would result from an earthquake, assuming that any road crossing the fault trace would become impassable.
There are several data collection techniques which can mitigate the effects of signal blockage by tree canopy or other objects.
GPS satellite launches began in 1978, and a second-generation set of satellites ("Block II") was launched beginning in 1989. Today's GPS constellation consists of at least 24 Block II satellites. The system became fully operational in 1995.
After World War II, and until the end of the Cold War, Europe was divided into two major political and economic blocks: Communist nations in Eastern Europe and capitalistic countries in Western Europe. Around 1990 the Eastern block broke up.
As another example, your FMU may have a split fire preparedness season, which needs to be reflected in your resource allocation. By aggregating the periods to form longer time blocks, ...
A Quartered flag is one that is divided into four equal blocks of color.
Dominican Republic
A page on the flag plus a quiz and coloring printout. Or go to a blackline master (printout) of the flag of Dominican Republic.
You should now see what ArcView calls a "symbol" (a block of color that is orange in this example; ArcView assigns the color randomly) in the "Legend" area of the View window.
Commonly, however, survey data will be in the form of CAD drawings, which may have thematic (layer) structure or complex block-attribute structure themselves. Here, the source and derivation of the data used to construct each layer must be documented.
A unit of land defined by the DC Surveyor that normally consists of a single city block and contains record and tax lots.
SSD
Street Spatial Database, the DDOT central GIS data repository for all transportation related assets and data.
The minimum acceptable satellite elevation above the horizon to avoid blockage of line-of-sight.
Multi-channel receiver
A GPS receiver that can simultaneously track more than one satellite signal.
Address matching - A geographic data processing operation that relates street addresses to census blocks, census tracks or other administrative units. See also Geocoding and Quasi-spatial attribute.
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Hollow concrete or cement block construction
CBD
Central business district ...
Address - "1. A means of referencing an object for the purposes of unique identification and location. 2. The location of a block of computer memory" (Gittings & Patterson, 1999).
The standard leading is two points greater than the point size of the type. For example, for a block of text in 12 point type, the leading would be 14 points. Leading can be a negative or positive value.
TINs work by making triangles between points/lines with elevation values. Depending on the number of values in your map, it may look more or less blocky.
To create a Raster: ...
Font A logical set of related patterns representing text characters or point symbology (e.g., A,B,C). A font pattern is the basic building block for markers and text symbols.
 See also: Information, Area, Feature, GIS, Map
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