Shapefile
Tags
hydrography data, HJ Andrews,
Oregon, Lookout Creek, streams, Western Cascades, streamflow, aquatic habitat, stream order,
hydrology/water, stream hydrology
Prepared as a base layer in the HJ Andrews GIS database. Updates the previous stream network to match the 1 meter bare earth DEM (from 2008 Lidar flight).
HJ Andrews Experimental Forest Stream Network derived from the 2008 Lidar bare earth Digital Elevatiion Model (DEM). This layer was generated using arcgis hydrography tools and the one meter resolution DEM. The resulting stream layer was modified by hand, to correct stream flows through culverts. Stream order was added as an attribute by Keith Olsen.
There are no credits for this item.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
Extent
West | -122.271699 | East | -122.107881 |
North | 44.278860 | South | 44.199773 |
Maximum (zoomed in) | 1:5,000 |
Minimum (zoomed out) | 1:150,000,000 |
hf01302
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ground condition
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Access constraints: Available on line
Use constraints: See data access policy at www.fsl.orst.edu/lter/data.cfm (especially the data use policy)
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
Comment: Very Good
Data complete for the entire basin
Stream network generated from 2008 LiDAR one meter bare-earth Digital Elevation Model (DEM). This layer was generated using the streamtofeature command in arcgis toolbox, with the flowdirection grid (hja_flowd). Attribute name was added to the resulting shapefile, with known stream names added to streams. Comments were added for streams where features were identified in the field, such as large culvert, no water. Type 2 streams were eliminated as being without water. Streams were corrected for culvert locations through roads. The program to generated the streams did not take this into account. On screen digitizing was done throughout the basin to correct the stream flow, based on the one meter DEM. SimplifyLine and SmoothLine commands were used to smooth the stream lines out, from the raster based linework. Width attribute was added to main lines of the Andrews, so that they would appear wider on the 2011 Andrews map. The geodatabase feature class was converted into a shapefile for distribution on the web. All commands issues can be found in the geoprocessing history report on the esri description tab in arc catalog.
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coverage was converted to a shapefile for distribution.
to meet requirements of US Forest Service
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Stream order was added as a field. Keith Olsen, OSU did this by hand, tracing first orders down to stream junctions and then moving upstream.
generated from August 2008 Andrews Lidar 1 meter DEM, FSDB database number GI010
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poly line
esri
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Feature geometry.
ESRI
Coordinates defining the features.
internal code, unknown
esri
Internal node number for the beginning of an arc (from-node).
esri
Internal node number for the end of an arc (to-node).
esri
stream name where one exists
CFS documentation
indicates if water present in summer, culvert, and channels.
internal documentation
free text comments from survey of specific streams to verify status
internal documentation
open free text
type was used to determine what lines in the computer generated stream network were representative of true streams, not just flow.
internal documentation
internal field created during smoothing process
esri
feature ids of the input layer before the smoothing.
internal flag that is used to examine features that have topological errors.
esri
whole numbers
length of the line segment
esri
length in meters
used to differentiate between the larger, main streams and the smaller streams. Used to create the 2011 Andrews Map.
internal documentation
stream order
Keith Olsen
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