-

Real-time

Refers generally to systems that respond (almost) immediately or synchronously to external events.

       -

Route Service

A network-accessible service that determines travel routes and navigation information between two or more points.

      -

Record

[data structure] A record in an attribute table row that specifies an instance of an entity. It represents a spatial feature in the dataset in a one-to-one relationship.

       -

Raster Data

[data structure] A raster is a data model used in GIS which are usually regularly-size rectangular or square shaped grid cells arranged in rows in columns.

      -

Raster-to-vector

The process of converting an image made up of cells into one described by lines and polygons.

      -

Resolution

least detectable difference in a measurement; in a geographic context, resolution applies to all components (time, space and attribute) according to the measurement framework. Not identical to accuracy.

       -

Representation

a symbolic mechanism to encode data. Using computers, involves a data model, a data structure and its implementation.

       -

Relational database

a data model based on set theory. Each set has elements that can be uniquely defined by a primary key. A table (relation) stores all records for a set. Each record in a table has the same columns for attribute values. Relationships between tables are constructed by storing the key to a record in the other table (a foreign key).

       -

Recursive

a programming procedure that invokes itself to subdivide a problem

       -

Ratio

a level of measurement that includes both extensive and derived measurements. The numerical values of the measurement have a meaningful zero reference and a fixed unit of measure

2405

Reference ellipsoid

Elipsoid rujukan

Geospatial

Geomatik

Geometric reference surface embedded in 3D Euclidean space formed by an ellipse that is rotated about a main axis.

Rujukan permukaan geometri berdasarkan elipsoid.
 

1944

Relative accuracy

Ketepatan relatif

Geospatial

Penderiaan jauh, Geomatik

Closeness of the relative positions of features in a dataset to their respective relative positions accepted as or being true.

Kedudukan relatif terhampir dalam set data berbanding titik rujukan sementara.

868

Radiance

Sinaran

Geospatial

Geomatik, Penderiaan Jauh

At a point on a surface and in a given direction, the radiant intensity of an element of the surface, divided by the area of the orthogonal projection of this element on a plane perpendicular to the given direction.

Unsur keamatan sinaran pada titik permukaan yang dibahagikan oleh kawasan unjuran ortogonal dengan satah serenjang dari arah yang diberikan.