1. Clip versus Overlay Module 4:

2. Module 3: Project Programs ArcGI S ArcCatalo g ArcMap ArcToolbox

3. In projects a spatial extent is required. Definition of spatial extent: The minimum bounding rectangle (xmin, ymin and xmax, ymax) defined by coordinate pairs of a data source. All coordinates for the data source fall within this boundary. Module 4:

4. Module 4: Clip Versus Overlay Clip = A command that extracts features from one feature class that reside entirely within a boundary defined by features in another feature class. What type of GIS data handling type is this?

5. Module 4: Clip Versus Overlay Clip The number of features change when applying a clip operation. Important is to remember is the feature object definition does not change !

6. Module 4: Clip Versus Overlay Overlay In a spatial overlay operation both the number of features change and the object definition.

7. Module 4: Clip Versus Overlay Overlay (Intersect) Important is to remember is the feature object definition DOES CHANGE! What type of GIS data handling type is this?

8. Questions?  © Wageningen UR Which GIS operation is required to extract data from the external spatial geodatabase “Geotools” for the lightrail project? What extra spatial information do you need to know to get the correct spatial data?