Oregon provides access to aerial photography through image services, meaning you may stream the imagery directly to a GIS client. This is a convenient way to use high resolution imagery with applications that support services (e.g., GIS and web applications), eliminating the need for a copy of the source imagery on your local disk drives.
The aerial imagery web services are available in the following formats: ArcGIS REST, Web Coverage Service (WCS), and Web Mapping Service (WMS).
|ArcGIS Layer File||2009||2005||2000||1995|
For users of Esri ArcMap software, the imagery can be accessed either by registering GEO's ArcGIS Server (http://navigator.state.or.us/ArcGIS/rest/services) and adding the image service located in the 'Framework' folder, or by adding the service by the layer file (see link above). Doing so will provide access to the color infrared (4th band) imagery, as well as other image rendering tools through ArcMap's Image Analysis window.
Enabling the Color infrared band in ArcMap:
To view the 2009 1/2meter service as a color infrared image, follow these steps:
- Add the image service using either of the two steps above.
In the Table of Contents, right click on the layer file and select properties.
Select the Symbology Tab, and change the RGB bands so that the Red = Band 4, Green = Band 3, and Blue = Band 2.
3. Using the Image Viewing Tool:
GEO has developed a new Map viewer that incorporates the imagery for 2009 (including the infrared band, enabled by clicking checkbox under top menu), 2005, 2000, and 1999. The functionality of this beta application will be soon be expanded to include additional features, including: image extraction (clip, zip, and ship), zoom to address or other points of interest, enable reordering image services and image transparency to enable change detection.
Launch the Image Viewing Tool.
Quantum GIS: www.qgis.org
ArcGIS Explorer (free desktop tool): http://www.esri.com/software/arcgis/explorer
ArcGIS Explorer Online (free online tool): http://www.explorer.arcgis.com/