This procedure will outline two methods for clipping data within ArcMap: using the select feature tool and clipping files based on a pre-existing boundary. To clip more than one file at a time, use the ArcView 3.2 Batch Clip tool or follow the steps outlined in the ACMLA Bulletin 125, page 18 for clipping multiple files in ArcMap. Input Features (the layer to be clipped): ONrds Clip Features (the layer to use as the clipper): CANrmn Output Feature Class (location and filename of the newly clipped layer) This procedure will outline two methods for clipping data within ArcMap: using the select feature tool and clipping files based on a pre-existing boundary. To clip more than one file at a time, use the Run ArcMap and add a single data set that requires clipping. For this exercise the DMTI street network will be clipped to isolate the Niagara Region. In the map window, draw a box around the study area (in this case, the Niagara peninsula). All of the roads encompassed within this box are now selected. To create a new shapefile, right-click on the layer name indicated in the Table of Contents. In this case, right-click ‘ONrds’ and select Use the browse button to navigate to a suitable directory to save the file. (Students may save clipped data in the directory named ‘students’ on the Public Workstation.) Click Save when you have selected a location and file name. Run Arcmap and add the file to be clipped and the boundary file to be used as the ‘clipper’. This example used a regional boundary file from DMTI Spatial. , then click on the polygon representing the Regional Municipality of Niagara. The border should be highlighted as in the image below. Source.