GIS Dictionary | Letter L

– L –

Land Information Systems (LIS)
Specialized GIS systems most commonly found among municipal agencies geared toward legal, administrative and economic spatial analysis. Also known as Land Records Information System (LRIS).

Latitude
The latitude of any place is its angular distance north or south of the equator.   The parallels of latitude are a series of imaginary circles passing around the earth, parallel to the equator.  The angular distance from the equator to the poles is 90 degrees.

Layer
A spatial dataset containing a common feature type. Layers are also referred to as coverages or themes.

Line of Sight
The unimpeded view or access from one point to another point across a terrain or surface. See: Light of Sight in GIS

Longitude
Lines of longitude are called meridians and are imaginary great circles that pass through both the north and south poles and perpendicular to the equator.  The prime meridian passes through Greenwich, England.  The angular distance, measured along the equator from the meridian of Greenwich to the meridian passing through any other place, is called the longitude of that place.

Lot
Government lot or subdivision lot representing the boundary of a legally conveyable unit of land identified on a record document. A lot may or may not be coterminous with an Assessor parcel.

GIS Acronyms that start with L

LBS – Location-based Services

LiDAR – Light Detection and Ranging

More geographic concepts from the GIS dictionary:

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