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<div style="text-align:Left;"><div><div><p>Jackson County Streams layer is derived from Oregon Department of Forestry Hydrography Flowline (May 09, 2025 update) data, which is developed from best available digital elevation models from 2m LiDAR and the 10m National Elevation Dataset. For more information regarding the ODF dataset please see ODF"s ArcGIS Hub - <a target="_blank" rel="noopener noreferrer" href="https://oregon-department-of-forestry-geo.hub.arcgis.com/datasets/geo::hydrography-flow-line/about">Hydrography Flow Line | ODF ArcGIS Hub</a>. The statewide data is reduced to the Jackson County boundary and is edited, both in geometry and attributes, to meet the County’s needs.</p><p></p><p>The <i>Jackson County Planning Class (JCclass)</i> field is added to the Streams layer. This field reflects Jackson County’s Stream Classifications, as defined in Chapter 13 of the 2004 Land Development Ordinance and in Section 16 of the 1989 Jackson County Comprehensive Plan. The Stream Classifications are aligned with Statewide Planning Goal 5 and with OAR 660-023-0090. Furthermore, the Stream Classifications are <u>not</u> related to a typical hydrologic class or type, but exclusively the land-use planning designation.</p><p></p><p><i>Class 1</i> attributes (<i>JCclass</i> field) are applied to the new Streams flowlines to match the previously approved <i>Class</i>1 flowlines’ geometry. The archived <i>Streams and Irrigation Canals</i> data can be found here - <a target="_blank" rel="noopener noreferrer" href="https://jcgis.maps.arcgis.com/home/item.html?id=628a9a42402d4b9f853929ebbf8fbe92">CountyStreams - Overview</a></p><p></p><p><i>Class 2</i> attributes are applied to the new Streams flowlines using a series of select-by-location processes, involving <i>Class 2</i> flowlines from Original Streams & Irrigation Canals and USGS 3DHP flowlines, then afterwards a careful and arduous systematic review of <i>Class 2 </i>flowlines results. During the review, geometry and attribute edits were made to better reflect the location and <i>Class 2</i> designation.</p><p></p><p>Perfect geometry and attributes are unlikely given the complexity of the situation however significant and continuous efforts are made to review and improve the flowlines and attributes with best available GIS data and tools. For step-by-step processing of the Streams flowlines, please contact Jackson County GIS.</p><p></p></div></div></div> |