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GISP WITH 100- SURE ANSWERS
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GISP WITH 100- SURE ANSWERS
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EUNICEGISP WITH 100% SURE ANSWERS
Terms in this set (328)
Data exploration Data-centered query and analysis
Dynamic Segmentations A data model that allows the use of linearly measured data on a coordinate system
Georelational data model A vector data model that uses a split system to store geometries and attributes
Data that describes both the locations and characteristics of spatial features on the
GeoSpatial data
earth surface
A data model that uses objects to organize spatial data and stores geometries and
Object-based data model
attributes in a single system
Raster data model A data model that uses a grid and cells to represent the spatial variation of a feature
Relational Database A collection of tables in which tables are connected to one another by keys
A subfield of mathematics that when applied to GIS, ensures that the spatial
Topology
relationships between features are expressed explicitly
Composite vector data that approximate the
terrain with a set of nonoverlapping triangles
Triangulated irregular network (TIN)
A spatial data model that uses points and their x y coordinates to construct spatial
Vector data model
features of points, lines and polygons
One type of map projection that retains certain
accurate directions. Azimuthal also refers to one
Azimuthal Projection
type of map projection that uses a plane as the
projection surface
The central parallel and the central meridian. Together, they define the center or the
Central lines
origin of a map projection
A ground-measured ellipsoid, which is the basis for the North American Datum of
Clarke 1866
1927 (NAD27)
Conformal projection One type of map projection that preserves local shapes
1/5
, One type of map projection that uses a cone as
the projection surface
Conic Projection
One type of map projection that uses a cylinder as
the projection surface
Cylindrical Projection
The basis for calculating the geographic coordinates of a location. An ellipsoid is a
Datum
required input to the derivation of a datum
A change from one datum to another, such as from NAD27 to NAD83, which can
Datum shift
result in substantial horizontal shifts of point positions
A measurement system for long and lat values
such as 42.5
Decimal degrees (DD) system
A measurement system for long and lat values
such as 42 30' 00", in which 1 degree equals 60
Degrees minutes seconds
minutes and 1 minute equals 60 seconds
Ellipsoid A model that approximates the earth, ALSO called spheroid
Equidistant projection One type of map projection that represents areas in correct relative size
A value applied to the origin of a coordinate system to change the x-coordinate
False easting
readings
A value applied to the origin of a coordinate system to change the x-coordinate
False northing
readings
A Database developed by the US bro of Land Managment (BLM) to include long and
Geographic Coordinate data base (GCDB) lat values and other descriptive information for section corners and monuments
recorded in the PLSS
Geographic Coordinate System A location reference system for spatial features on the Earths surface
GRS80 A satellite-determined ellipsoid for the Geodetic Reference System
Lambert Conformal conic projection A common map projection, which is the basis for the SPC system for many states
The angle north or south of the equatorial plane
Latitude
The angle east or west from the prime meridian
Longitude
Map Projection A systematic arrangement of parallels and meridians on a plane surface
Lines of longitude that measure locations in the E-
W direction on the geographic coordinate system
Meridians
NAD27 North American Datum of 1927 which is based on the clarke 1866 ellipsoid
2/5
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