# What is the topology in GIS?

## What is the topology in GIS?

Today, topology in GIS is generally defined as the spatial relationships between adjacent or neighboring features. Mathematical topology assumes that geographic features occur on a two-dimensional plane.

### What is spatial topology?

The notion of spatial topology presents a network view as to how the primary objects become interconnected via. the contextual objects. A spatial topology can be represented as a simplicial complex.

#### What are topological features?

Topology is the arrangement of how point, line, and polygon features share geometry. Topology is used for the following: Constrain how features share geometry. For example, adjacent polygons such as parcels have shared edges, street centerlines and census blocks share geometry, and adjacent soil polygons share edges.

What are topology rules?

Topology rules allow you to define those relationships between features in a single feature class or subtype or between two feature classes or subtypes. Topology rules allow you to define the spatial relationships that meet the needs of your data model.

How do you use topology?

Here is the process used to create a topology using ArcCatalog.

1. Right-click the feature dataset to which you want to add a topology, point to New, then click Topology.
2. Click Next.
3. Name the new topology and specify the cluster tolerance.
4. Click Next.
5. Next, choose the feature classes that will participate in the topology.

## How do you use topology in GIS?

Right-click the feature dataset to which you want to add a topology, point to New, then click Topology. Click Next. Name the new topology and specify the cluster tolerance. The default value will be set to the x,y tolerance of the feature dataset.

### What is topology used for?

Topology is used in many branches of mathematics, such as differentiable equations, dynamical systems, knot theory, and Riemann surfaces in complex analysis. It is also used in string theory in physics, and for describing the space-time structure of universe.