GISRSStudy » ArcGIS » Thiessen Polygons

Thiessen Polygons in ArcGIS

What is Thiessen Polygons

Thiessen polygon contains only a single point input feature. Any location within a Thiessen polygon is closer to its associated point than to any other point input feature.

Thiessen Polygons feature
Input
Thiessen Polygons
Output

Thiessen Polygons Method

Thiessen polygon tool is used to divide the area covered by the input point features into proximal zones. These zones represent full areas where any location within the zone is closer to its associated input point than to any other input point.

All points are triangulated into a Triangulated Irregular Network (TIN) that meets the delaunay criterion.

The outside boundary of the output Thiessen polygon feature class is the extent of the point input features plus an additional 10%.

Create Thiessen Polygons in ArcGIS

1. Open ArcMap, and add Shapefiles.

Two types of shapefile are required to perform this task. i) Point, and ii) Area (polygon).

2. Open ArcToolbox, go to Analysis Tools > Proximity > Thiessen Polygons.

3. In the Input Features section, browse and selecct data (ex.- rain).

4. The Output Feature Class section, go to destination folder and write the valid file name (ex.- Thiessen Polygons).

5. In the Output Field section, choose ALL, and finally click OK button.

Create Thiessen Polygons

Thiessen Polygons Example

Now show your Thiessen Polygon result.

Thiessen Polygons

Leave a Comment

Your email address will not be published.