How to Clip Rasters to Polygon Boundaries in ArcGIS – GIS Geography
The ArcGIS 10 Image Analysis Toolbar brings a way to clip rasters as well. The main advantage of the Image Analysis Toolbar is that you can visualize the end-result before you export it. 1. Clip ( Data Management >, Raster >, Raster Processing >, Clip ) 2. Raster Clip (Image Analysis Toolbar) In this example, we clip “Shaded Relief” (raster) to the state of Wyoming (polygon) using both clipping techniques. In ArcToolbox ( Data Management >, Raster >, Raster Processing >, Clip ), double-click the clip tool. Output Extent (optional) is the polygon boundary you want to clip to. You can select specific records in the polygon dataset and it will only clip this boundary. In our case, we would select the polygon of Wyoming before dragging and dropping it in the field. If you have coordinates instead of a polygon extent, type the maximum and minimum X and Y values. Enable the Image Analysis Toolbar ( Windows >, Image Analysis ). The image analysis window will be displayed in ArcMap. In the image analysis toolbar, select the raster that you want to clip. Make sure checkbox is selected. Also, highlight the raster as well. If you don’t highlight the raster in the image analysis toolbar, the clip button will be greyed out. Click the “clip” button in the image analysis toolbar. This will create a temporary raster. You can view the temporary clipped raster for an idea of how it will look when exported. All you have to do now is save this clipped raster. In the Image Analysis Toolbar, highlight the new clipped raster that has been created. Save the new clipped image by clicking the export button. Choose the location and name of the file that you want to save. You can also change the cell size and the format of the clipped raster. Click save. Just think about each and every hour you’ve spent processing, analyzing and manipulating raster data. Image resolution is becoming sharper meaning a requirement to work with larger raster file sizes. LiDAR data is a beast to work with. This puts the crunch on you and your processor. Wouldn’t it be nice to cut processing time down? The good news is that you can save time when working with raster data. How? Clip rasters to shapefiles (your area of interest). When you clip rasters, you generate workable subsets of data. We limit analysis to only the area of interest. This list of earth-shattering remote sensing applications will change the way you feel about how this industry is changing our world and the way we think. […] We look at the digital image classification techniques in remote sensing (such as supervised, unsupervised & object-based) to extracts features of interest. […] It’s a head-to-head GIS software showdown with the star-studded lineup in the GIS industry- ArcGIS vs QGIS. Discover the differences between ArcGIS and QGIS […] Map all day. Geoprocess all night. All with gvSIG software. gvSIG emerged in 2004. It’s been fine-tuned for over a decade and is used around the world. […] Source.