How to create a polygon with a circular hole in openlayers 3?

How do you create a polygon with a hole in it Arcgis pro?

A hole in a polygon feature is a part of a multipart feature. To create a hole, finish the primary part and sketch the hole. Alternatively, you can split the feature and delete the part, or clip a hole using an existing overlapping feature. These tools are available in the Modify Features pane.

How do you draw a polygon in Openlayers?

Select a geometry type from the dropdown above to start drawing. To finish drawing, click the last point. To activate freehand drawing for lines, polygons, and circles, hold the Shift key. To remove the last point of a line or polygon, press “Undo”.

How do you make a hole in a polygon in Qgis?

Quote from video: Area and enable this advanced digitizing toolbar from here. We'll use this tool. Called add ring and this allows us to add a inner ring to this polymorph which will create the hole.

How do you triangulate a polygon with holes?

Let a polygon P with h holes have n vertices total, counting vertices on the holes as well as on the outer boundary. Then a triangulation of P has t = n + 2h – 2 triangles, and a quadrilateralization has q = n/2 + h — 1 quadrilaterals.

How do you fill a hole in a polygon?

Select the polygons that have holes you want to fill. on the Production Editing Advanced toolbar. Press the Ctrl key and click inside any of the selected polygons. The Fill Hole message appears and notifies you that all holes in the selected features will be filled.

How do you draw a polygon in a circle?

Quote from video: The first step is to draw perpendicular vertical and horizontal diameters. As can be seen here in the video I do this using a 45 degree set square with a built-in protractor.

How can I construct a polygon?

Quote from video: So now we are going to draw a regular hexagon given the length of one of its sides L. The next step with our compass set on the point a and radius a B we draw an arc to the left.

How do you draw a polygon in OpenGL?

To understand the format of this array, let’s see what it would look like for our triangle. float vertices[] = { 0.0f, 0.5f, // Vertex 1 (X, Y) 0.5f, -0.5f, // Vertex 2 (X, Y) -0.5f, -0.5f // Vertex 3 (X, Y) }; As you can see, this array should simply be a list of all vertices with their attributes packed together.

How do you make a hole in a polygon in ArcMap?

Procedure

1. In ArcMap, select Editor > Start Editing.
2. From the Task drop-down menu, select Create New Feature.
3. To cut a hole out of an existing polygon, click the Edit tool and double-click the polygon to see the Edit sketch.
4. Right-click on the Edit sketch of the exterior of the polygon and click Finish Part.

How do I make a polygon fill transparent in ArcGIS?

Applying transparency to polygon layers

1. On the main menu, click Customize > Customize Mode. The Customize dialog box appears.
2. Click the Commands tab.
3. In the Categories list, click Production Mapping.
4. Click and drag the Apply Transparency To Polygon Layers button. to a toolbar.
5. Click Close.

How do I create a polygon with an area in ArcGIS?

Create regular polygon features

1. Add your data and configure settings for editing.
2. On the ribbon, click the Edit tab.
3. In the Create Features pane, click a polygon feature template.
4. Click the Regular Polygon tool .
5. Click the map to create the center point.
6. Move the pointer and click the map to specify a distance.