Overlay Analysis: Point In Polygon

Aim:

To create perform overlay analysis of two (digitized) Point and Polygon Feature dataset.

Procedure:

Step 1: Map Input

Identify the two layers that can be digitized from your toposheet or base map. For this session, Forest Area and Settlements were digitized from the given topographic map of Nellore & Cuddapah Districts.  The Polygon Entities were saved into respective shapefiles in target ArcCatalog Folders. 

Step 2: Map Processing

• ·         Digitize the Polygon features for selected entities. Perform Attribute Editing. “Add Field” for “Name” and “Area”.  Specify the Names and calculate geometry to calculate shape area.  (note to calculate geometry, the features need to be on Projected coordinate system).
• ·         Locate the “Intersect” in Analysis -> Overlay, toolbox.
• ·         Add the Tool Inputs as  “Forest” and update feature as “Settlements” and specify the target output folder.
• ·         Click “Ok” to generate the map output, of all settlements inside forest

Step 3: Map Display

Create Custom Map Layout with the necessary map elements and Export map to Jpeg format. One may also choose to Add Attribute table to layout, an option available within the Table options.

Conclusion:

Point in Polygon map for the chosen polygon attributes layers are generated using ArcGis 10.1.