The GIS Data Portal is for downloading raw shape files for use in specialized GIS and AutoCAD software applications.
If you would like to print a map on-line, follow this link instead: MapOptix 
There are two locations where you can download raw shape files for use in specialized mapping softwares, click the links below:
Metro's RLIS Discovery Site, Portland Region-Wide GIS Data:
Clackamas County GIS:
Information about the Clackamas County GIS Data Portal:
The GIS Data Portal is provided by Clackamas County GIS. Download County-wide GIS data in ESRI shape file format at no charge. Use of the shape files is governed by the GIS Data Licensing Agreement on the Portal website. Raw data file downloads include the West Linn area which is located in Clackamas County, Oregon. You must provide your own GIS software to create various maps. Available data includes: city boundaries, streams, streets, USGS contours, and more. Additionally, raw GIS data is also available from:
Contact the City's GIS Coordinator  directly for detailed West Linn specific geographic data.