Bolzenschweisstechnik

Bolzenschweißtechnik seit 1970. Geräte und Schweißbolzen direkt vom Hersteller. Hohe Qualität Made in Germany

Eintrag vom: 11.04.2013.

This document provides an overview of spatial referencing concepts for GIS. It discusses why spatial referencing is important including integrating data from different sources and using satellite positioning.

 

A spatial reference is used to provide a framework when measuring and representing geographic features from different sources. Each spatial reference is defined either by a WKID?also called a spatial reference ID (SRID)?or by a WKT.

 

A spatial reference is the coordinate system used to store each feature class and raster dataset as well as other coordinate properties such as the coordinate resolution for x y coordinates and optional z- and m-coordinates.

 

Spatial referencing is a foundational concept in computer science that enables the precise specification indexing and querying of spatial locations across diverse applications.

 

A spatial reference describes where features are located in the real world. You define a spatial reference when creating a geodatabase feature dataset or stand-alone feature class.

 

We use a Reference surface (i.e. datum system) to approximate the shape of the Earth. A horizontal datum (also called geodetic datum) is a model used to measure positions on the Earth. A Vertical datum is a model used to measure elevations which is related to the Geoid.

 

A spatial reference system (SRS) or coordinate reference system (CRS) is a framework used to precisely measure locations on or relative to the surface of Earth as coordinates.