Jan 2, 2026 · This website is essential for geospatial professionals, GIS developers, and cartographers, providing an extensive database of spatial reference systems used globally.

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.

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- …

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

Spatial referencing Users of spatial data need to understand basic spatial r. ferencing concepts. These concepts are discussed in the new edition of the textbook Principles of Geographic Information Sy. …

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 …

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.

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 …

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.

Mar 6, 2012 · Types of Spatial Referencing Geographic Coordinate Systems (GCS) It is a spherical or ellipsoidal model of the Earth for defining coordinates. They are the most common type of spatial …