Is Donut a polygon?

Is Donut a polygon?

a donut polygon is a polygon with one or more holes in it. Such a feature is regarded as a complex geometry, having an outer ring of coordinates, and one or more inner rings of coordinates that represent the (donut) holes.

How do I cut a hole in a polygon in ArcGIS?

You can cut holes in existing polygon features to create a donut polygon.

1. Ensure point snapping is enabled.
2. Click the Snapping menu on the Snapping toolbar and click Snap To Sketch.
3. Click the Cut Polygons tool.
4. Sketch the area you want to remove.
5. To use an existing polygon for the shape of the hole, click Trace.

How do I cut a shape in ArcGIS?

How do you cut one polygon into another?

Procedure

1. Select both polygons.
2. On the Editor toolbar, set the ‘target layer’ to the layer containing the polygon to be cut.
3. Set task to Cut Polygon Feature.
4. Set the snapping environment to the polygon to be cut.
5. Trace that polygon or right-click and select Replace Sketch. Finish Sketch on the cut polygon.

What do you use a donut polygon for?

Donut polygons are commonly used with administrative boundaries. For example, a city may have unincorporated areas within its limits, or school districts may have holes or discontinuities.

How are polygons stored in the shapefile white paper?

1 Answer 1. According to the Shapefile white paper (page 8), polygons are stored in a clockwise fashion except for interior polygon hole parts (i.e. ‘donut holes’), which are stored in a counter-clockwise fashion.

How to make a donut hole in ArcGIS?

Click a construction tool and method and digitize the outer boundary of the polygon, without finishing the sketch. Hold down the SHIFT key and click, or right-click and click Finish Part . Click inside the polygon and sketch the inner boundary.

How to make an island out of a donut hole?

Hold down the SHIFT key and click, or right-click and click Finish Part . Click inside the polygon and sketch the inner boundary. If you are creating a donut polygon, finish the sketch. To create an island, finish the part and create another sketch inside the hole, then finish the sketch.