A Active Layer:
The active layer
is the layer
which button and tool actions or corresponding menu commands are applied too. An active layer
appears with a light blue background in the table of contents.
Characteristic of a geographic feature
described by numbers or letters, typically stored in tabular format and linked to the feature
in a relational database. The attribute
s of a parcel might include PIN, address, and owner.
A zone or area around (a) feature
(s) measured in units of distance or time.
The minimum sized rectangle that all data from (a) layer
(s) fall within.
A representation of a real-world object on a map, such as a parcel, street, or address.
The process of identifying an approximated location by x,y coordinates from a location description such as an address. For example, an address can be matched against Buncombe County's street centerline file to determine an approximated x,y coordinate.
The visual representation of related geographic data. A layer
maybe roads, rivers, or parcels.
The symbology used to represent geographic data in a layer
The geometric shape of either a line or a polygon that is used to represent a specific kind of feature
in a legend
and in the table of contents.
An operator used to compare logical expressions that returns a result of true or false. Examples of logical operator
s include less than (<), greater than (>), equal to (=), and not equal to (<>).
A predefined set of layer
s and their associated symbology. Used in mapAsheville to convey a particular subject matter such as development activity, economic development, public transportation, or crime.
The ratio or relationship between a distance or area on a map and the corresponding distance or area on the ground, commonly expressed as a fraction or ratio. A map scale
of 1/100,000 or 1:100,000 means that one unit of measure on the map equals 100,000 of the same unit on the earth.