Summary
A point is represented by explicit x and y coordinates in vector format, whereas a raster is represented as a single cell. A raster consists of a matrix of pixels organized into rows and columns, with each pixel containing a value representing information such as image reflectance or temperature. Identifying clusters of point features near raster cells can be accomplished using ArcGIS Pro geoprocessing tools. This article provides detailed steps to identify point features near or on raster cells with high values in ArcGIS Pro.
Procedure
- Open the ArcGIS Pro project.
- Convert the raster dataset to point features using the Raster to Point tool.
- On the ribbon, click the Analysis tab, in the Geoprocessing group, click Tools.
- In the Geoprocessing pane, search for and click Raster to Point (Conversion Tools).
- In the Raster to Point pane, for Input Raster, select the raster dataset from the drop-down list.
- For Field, select the field that aligns with Input Raster and click the drop-down list.
- For Output point features, specify a name and location.
- Click Run.
- Select the raster cells with high values using Select By Attributes.
- On the ribbon, click the Map tab, in the Selection group click Select By Attributes.
- In the Select By Attributes dialog box, for Input Rows, click the drop-down list and select the output point feature layer created in Step 2.
- For Selection Type, click the drop-down list and select New selection.
- Enter the query expression in Clause mode.
Where ‘<Field>’ ‘is equal to’ ‘<Value>’
- Click the Verify button to validate the expression.
- Click OK.
- Export the selected features to a new feature class using the Export Features tool.
- On the ribbon, click the Analysis tab, in the Geoprocessing group, click Tools.
- In the Geoprocessing pane, search for and click Export Features (Conversion Tools).
- In the Export Features pane, for Input Features, select the feature layer with the selected features from the drop-down list.
- For Output Feature Class, specify a name and location for the output feature layer.
- Click Run.
- Create buffer polygons within the feature layer with a specified distance using the Buffer tool.
- On the Analysis tab, in the Geoprocessing group, click Tools.
- In the Geoprocessing pane, search for and click Buffer (Analysis Tools).
- In the Buffer pane, for Input Features, select the output feature layer generated in Step 4.
- For Output Feature Class, specify a name and location for the output.
- For Distance, specify a distance and Linear Unit from the drop-down list.
- Leave the other parameters as default.
- Click Run.
- Select the features within the buffer polygon using the Select By Location tool.
- On the ribbon, click the Map tab, in the Selection group, click Select By Location.
- In the Select By Location dialog box, specify the Input Features and Selecting Features parameter.
- For Input Features, select the feature layer created from Step 2 from the drop-down list.
- For Relationship, click the drop-down list, and select Intersect.
- For Selecting Features, click the drop-down list and select the feature layer created in Step 5.
- Click Apply > OK.
- Repeat Step 4 to export the features selected in Step 6 using the Export Features tool.
The image below shows the point features that are located near or on raster cells with high values.
Note:
Run the Point Density or the Kernel Density tool to create density of points from the output feature classes, if necessary. Refer to the ArcGIS Pro: How Point Density works and ArcGIS Pro: How Kernel Density works for more information.