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The fields POINT_X and POINT_Y will be added to the attribute table. Choose your random point shapefile andĬlick OK. To add the coordinates for each point to the attribute table, open ArcToolbox > Data Management

Your points should now be numbered from 1 to N. Right-click on the field heading CID and choose Field Calculator. The points will be created and added to your map.ĭ) If you later need to identify your random points (which is likely), open the attribute table, Finally, if you need the points to be a minimum distance apart from one another, enter this value (E) and click OK. Enter the number of random points you need. You can define the grid extent using specific coordinates. They range from manually defining the extent with a bounding box to using coordinates to define the grid extent. With the Create Polygon Grid Wizard, you have several options for specifying the extent of your grid. If you have a constraining layer (a forest stand boundary or ownership boundary) select it. The grid extent is the area that the polygon grid covers in the map. Verify that the data frame has the correct coordinate system defined.ī) Open ArcToolbox and open the Data Management Tools > Feature Class > Create random points tool.Ĭ) Choose an output directory and a file name (random_points is suggested). If necessary, select the polygon in which you would like the points contained. Add any layers you need, including a polygon layer in which you would like to generate random points (e.g., stand boundaries). It applies to ArcGIS 9.x and 10.Ī) Prepare a map document in ArcMap. The tool used to generate random points is found in Arc Toolbox : Data Management Tools > Feature Class > Create Random Points.Ī one-page tutorial on generating random points is available here, or see below. One method is to generate a number of random points in a given parcel of land where sampling will occur.ĪrcGIS can generate a specified number of randomly-placed points within the boundary of a layer or inside a selected feature in a layer. There are several strategies available to perform these assessments. One common activity in the natural resources field is the assessment of resources, such as vegetation, wildlife, or soil, in an area.