Hillshade grid generated from 2011 LiDAR 1 meter highest-hits DEM , Blue River Watershed

Raster Dataset

Thumbnail

Tags
USFS, Oregon, LiDAR, bare earth, Linn County, digital terrain model, EPA, bare ground, Light Detection and Ranging, Pacific Northwest, Blue River, elevation data, topography, high-resolution, DEM, Lane County


Summary

The purpose of the hillshade is to provide topographic relief for maps, figures, and visualizations. The hillshade can also be used to capture features (roads, buildings, bridges), and to locate geological features such as landslides, stream channel characteristics, and earth movement. This data set is suitable for detailed work. Visualizations of the raw point clouds would be appropriate for those looking for sub-meter accuracy.

Description

The hillshade was generated from the 1 meter highest-hits digital elevation model(DEM) based on the 2011 LiDAR flight over the Blue River Watershed, Willamette National Forest. The hillshade is at 1 meter resolution, and provides a detailed visualization of the forest, including the vegetation. The hillshade command in spatial analyst was used with a sun azmuth of 345 degress and the altitude was set for 65 degrees.

Credits

Use limitations

In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data. TINing the points produces large triangles and hence the elevations may be less accurate within such areas. Elevation values for open water surfaces are not valid elevation values because few LiDAR points are returned from water surfaces. Triangles were created across water surfaces by interpolating from the nearest land points.

Extent

West  -122.334155    East  -122.129467
North  44.340085    South  44.202966

Scale Range
Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000

ArcGIS Metadata ▼►

Topics and Keywords  ▼►

Themes or categories of the resource  elevation


* Content type  Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords  Oregon, Linn County, Pacific Northwest, Blue River, Lane County

Theme keywords  USFS, LiDAR, bare earth, digital terrain model, EPA, bare ground, Light Detection and Ranging, elevation data, topography, high-resolution, DEM

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Citation  ▼►

Title Hillshade grid generated from 2011 LiDAR 1 meter highest-hits DEM , Blue River Watershed
Creation date 2011-11-01 00:00:00
Publication date 2012-01-31 00:00:00


Presentation formats  * digital map


Other citation details gi01112.zip


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Citation Contacts  ▼►

Responsible party 
Organization's name Oregon State University College of Forestry
Individual's name Forest Science Data Bank
Contact's role  publisher


Contact information  ▼►
Address 
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area OR
Postal code 97331

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Responsible party 
Organization's name Watershed Sciences, Inc.
Individual's name Watershed Sciences, Inc.
Contact's role  originator


Contact information  ▼►
Phone 
Voice 541-752-1204

Address 
Type both
Delivery point 517 SW 2nd Ave.
City Corvallis
Administrative area OR
Postal code 97333
Country US
e-mail address watershedsciences.com

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Resource Details  ▼►

Dataset languages  English (UNITED STATES)
Dataset character set  utf8 - 8 bit UCS Transfer Format


Status  completed
Spatial representation type  * grid


Supplemental information
The dataset is projected in UTM Zone 10N, meters
* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3300


ArcGIS item properties 
* Name blue_hh_shd
* Location file://P:\HJA_LIDAR\blue_river\shaded_relief\blue_hh_shd
* Access protocol Local Area Network

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Extents  ▼►

Extent 
Description
date of LiDAR flight
Temporal extent 
Beginning date 2011-10-27 00:00:00
Ending date 2011-11-01 00:00:00

Extent 
Geographic extent 
Bounding rectangle 
Extent type  Extent used for searching
* West longitude -122.334155
* East longitude -122.129467
* North latitude 44.340085
* South latitude 44.202966
* Extent contains the resource Yes

Extent in the item's coordinate system 
* West longitude 553200.000000
* East longitude 569396.000000
* South latitude 4894783.000000
* North latitude 4909863.000000
* Extent contains the resource Yes

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Resource Points of Contact  ▼►

Point of contact 
Individual's name Theresa Valentine
Organization's name Corvallis Forest Science Laboratory
Contact's position Spatial Information Manager
Contact's role  point of contact


Contact information  ▼►
Phone 
Voice 541-750-7333
Fax 541-758-7760

Address 
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area Oregon
Postal code 97332
Country US
e-mail address tvalentine@fs.fed.us or theresa.valentine@orst.edu

Hours of service m-f 8:00am-4:00pm
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Resource Maintenance  ▼►

Resource maintenance 
Update frequency  not planned


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Resource Constraints  ▼►

Constraints 
Limitations of use
In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data. TINing the points produces large triangles and hence the elevations may be less accurate within such areas. Elevation values for open water surfaces are not valid elevation values because few LiDAR points are returned from water surfaces. Triangles were created across water surfaces by interpolating from the nearest land points.
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Spatial Reference  ▼►

ArcGIS coordinate system 
* Type Projected
* Geographic coordinate reference GCS_North_American_1983
* Projection NAD_1983_UTM_Zone_10N
* Coordinate reference details 
Projected coordinate system 
Well-known identifier 26910
X origin -5120900
Y origin -9998100
XY scale 450445547.3910538
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 26910
Well-known text PROJCS["NAD_1983_UTM_Zone_10N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-123.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26910]]

Reference system identifier 
* Value 26910
* Codespace EPSG
* Version 7.11.2


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Spatial Data Properties  ▼►

Georectified Grid  ▼►
* Number of dimensions 2


Axis dimensions properties 
Dimension type  column (x-axis)
* Dimension size 16196
* Resolution  1.000000 m (meter)

Axis dimensions properties 
Dimension type  row (y-axis)
* Dimension size 15080
* Resolution  1.000000 m (meter)

* Cell geometry  area
* Point in pixel  center


* Transformation parameters are available Yes


* Check points are available No


Corner points 
* Point 553200.000000 4894783.000000
* Point 553200.000000 4909863.000000
* Point 569396.000000 4909863.000000
* Point 569396.000000 4894783.000000

* Center point 561298.000000 4902323.000000


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ArcGIS Raster Properties 
▼►
General Information 
* Pixel depth 8
* Compression type RLE
* Number of bands 1
* Raster format GRID
* Source type continuous
* Pixel type unsigned integer
* No data value 255
* Has colormap No
* Has pyramids Yes


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Spatial Data Content  ▼►

Image Description 
* Type of information  physical measurement
Attribute described by cell values value for shading based on solar azimuth and angle.


Band information 
* Description blue_hh_shd
* Maximum value 254.000000
* Minimum value 0.000000
Units 
Symbol m

* Number of bits per value 8


Image quality code 
Value n/a


Processing level code 
Value n/a


Triangulation has been performed No
Radiometric calibration is available No
Camera calibration is available No
Film distortion information is available No
Lens distortion information is available No


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Data Quality  ▼►

Scope of quality information  ▼►
Resource level  dataset


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Data quality report - Absolute external positional accuracy  ▼►
Dimension horizontal


Measure description LiDAR flight lines have been examined to ensure that there was at least 50% sidelap, there are no gaps between flightlines, and overlapping flightlines have consistent elevation values. Shaded relief images have been visually inspected for data errors such as pits, border artifacts, gaps, and shifting. The data was examined at a 1:2000 scale. LiDAR data has been collected and processed to the extent of the boundary shapefile provided.


Standard procedure identifier 
Value none


Quantitative test results 
Value GT 50
Units 
Symbol %

Value type percent coverage
Evaluation type  direct external
Evaluation method flight overlap and extent greater than 50 percent.


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Data quality report - Absolute external positional accuracy  ▼►
Dimension vertical


Measure description Root Mean Square Error


Standard procedure identifier 
Value root mean square error


Quantitative test results 
Value  0.052
Units 
Symbol m

Value type RMSE
Evaluation type  direct external
Evaluation method The Root Mean Square Error (RMSE) of the data set is 0.052 meters. Accuracy was assessed using 419 ground survey RTK (real time kinematic) points. Please see LiDAR data report for a discussion of statistics related to these datasets.


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Lineage  ▼►

Process step 
▼►
When the process occurred 2011-11-01 00:00:00
Description Acquisition. The LiDAR data was collected on October 27, 28 and November 1, 2011. The survey used a Leica ALS60ii laser system mounted in a Cessna Caravan 208B. Near nadir scan angles were used to increase penetration of vegetation to ground surfaces. Ground level GPS and aircraft IMU were collected during the flight.


Process contact 
Organization's name Watershed Sciences, Inc.
Contact's role  processor


Contact information  ▼►
Phone 
Voice 541-752-1204

Address 
Type postal
Delivery point 517 SW 2nd Ave.
City Corvallis
Administrative area OR
Postal code 97333
Country US
e-mail address watershedsciences.com

Hide Contact information ▲


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Process step 
▼►
When the process occurred 2011-12-01 00:00:00
Description Processing. 1. Flight lines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Laser point return coordinates were computed using ALS Post Processor software, IPAS Pro GPS/INS software, and Waypoint GPS, based on independent data from the LiDAR system, IMU, and aircraft. 3. The raw LiDAR file was assembled into flight lines per return with each point having an associated x, y, and z coordinate. 4. Visual inspection of swath to swath laser point consistencies within the study area were used to perform manual refinements of system alignment. 5. Custom algorithms were designed to evaluate points between adjacent flight lines. Automated system alignment was computed based upon randomly selected swath to swath accuracy measurements that consider elevation, slope, and intensities. Specifically, refinement in the combination of system pitch, roll and yaw offset parameters optimize internal consistency. 6. Noise (e.g., pits and birds) was filtered using ALS postprocessing software, based on known elevation ranges and included the removal of any cycle slips. 7. Using TerraScan and Microstation, ground classifications utilized custom settings appropriate to the study area. 8. The corrected and filtered return points were compared to the RTK ground survey points collected to verify the vertical and horizontal accuracies. 9. Points were output as laser points, TINed and GRIDed surfaces.


Process contact 
Organization's name Watershed Sciences, Inc.
Contact's role  originator


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Process step 
▼►
When the process occurred 2012-02-02 00:00:00
Description The hillshade command in spatial analyst was used with a sun azmuth of 345 degress and the altitude was set for 65 degrees.


Process contact 
Individual's name Theresa Valentine
Organization's name Corvallis Forest Science Laboratory
Contact's position Spatial Information Manager
Contact's role  processor


Contact information  ▼►
Phone 
Voice 541-750-7333
Fax 541-758-7760

Address 
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area Oregon
Postal code 97332
Country US
e-mail address tvalentine@fs.fed.us or theresa.valentine@orst.edu

Hours of service m-f 8:00am-4:00pm
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Geoprocessing history  ▼►

Process 
Process name 
Date 2012-02-02 10:43:15
Tool location c:\program files\arcgis\desktop10.0\ArcToolbox\Toolboxes\Spatial Analyst Tools.tbx\HillShade
Command issued
HillShade hh_bluerivws P:\HJA_LIDAR\blue_river\shaded_relief\blue_hh_shd 345 65 NO_SHADOWS 1
Include in lineage when exporting metadata No


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Distribution  ▼►

Distributor  ▼►
Contact information 
Organization's name Forest Science Data Bank
Individual's name Forest Science Data Bank
Contact's role  distributor


Contact information  ▼►
Phone 
Voice n/a

Address 
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area OR
Postal code 97331
Country US

Contact instructions
visit the website @ http://andrewsforest.oregonstate.edu/lter/data/metadata.cfm?topnav=115
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Distributor  ▼►
Contact information 
Individual's name Theresa Valentine
Organization's name Corvallis Forest Science Laboratory
Contact's position Spatial Information Manager
Contact's role  distributor


Contact information  ▼►
Phone 
Voice 541-750-7333
Fax 541-758-7760

Address 
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area Oregon
Postal code 97332
Country US
e-mail address tvalentine@fs.fed.us or theresa.valentine@orst.edu

Hours of service m-f 8:00am-4:00pm
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Distribution format 
Version arcGIS 10.1
* Name Raster Dataset


Transfer options 
Units of distribution zip file


Online source 
Location http://andrewsforest.oregonstate.edu/data/studies/spatialdata/gi01112.zip
Access protocol zip file
Function performed  download

Hide Distribution ▲

Fields  ▼►

Details for object blue_hh_shd.vat  ▼►
* Type Table
* Row count 255
Definition
raster data set
Definition source
source


Field Rowid
  ▼►
* Alias Rowid
* Data type OID
* Width 4
* Precision 0
* Scale 0
* Field description
Internal feature number.
* Description source
Esri
* Description of values Sequential unique whole numbers that are automatically generated.


Hide Field Rowid ▲


Field value
  ▼►
* Data type Integer
* Width 4
* Alias VALUE
* Precision 0
* Scale 0
Field description
value for shading based on solar azimuth and angle.
The value represents illumination, where 0 = shadow, and 255 = full sunlight.
Description source
source
Range of values 
Minimum value 0
Maximum value 255
Units of measure illumination

Hide Field value ▲


Field COUNT
  ▼►
* Alias COUNT
* Data type Integer
* Width 4
* Precision 0
* Scale 0
Field description
number of times a value code occures in the grid
Description source
esri
Description of values sum of cells for particular values


Accuracy information 
Accuracy sum of cells for particular values
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References  ▼►

Aggregate Information 
Association type  cross reference


Aggregate resource name  ▼►
Title LIDAR REMOTE SENSING DATA COLLECTION: BLUE RIVER WATERSHED, OR
Creation date 2011-01-31 00:00:00


Responsible party 
Organization's name Watershed Sciences, Inc.
Contact's role  point of contact


Contact information  ▼►
Phone 
Voice 541-752-1204

Address 
Type postal
Delivery point 517 SW 2nd Ave.
City Corvallis
Administrative area OR
Postal code 97333
Country US
e-mail address watershedsciences.com

Hide Contact information ▲


Resource location online 
Location http://andrewsforest.oregonstate.edu/lter/data/aerial/Blue_River_LiDAR_Report.pdf
Function performed  download

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Metadata Details  ▼►

Metadata language English (UNITED STATES)
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset
Scope name  * dataset


* Last update 2014-12-08


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2012-02-02 10:43:15
Last modified in ArcGIS for the item 2014-12-08 14:42:47


Automatic updates
Have been performed Yes
Last update 2014-12-08 14:32:15


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Metadata Contacts  ▼►

Metadata contact 
Individual's name Theresa Valentine
Organization's name Corvallis Forest Science Laboratory
Contact's position Spatial Information Manager
Contact's role  point of contact


Contact information  ▼►
Phone 
Voice 541-750-7333
Fax 541-750-7760

Address 
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area Oregon
Postal code 97332
Country US
e-mail address tvalentine@fs.fed.us or theresa.valentine@orst.edu

Hours of service m-f 0800-1630
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Metadata Maintenance  ▼►

Maintenance 
Update frequency  not planned


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Thumbnail and Enclosures  ▼►

Thumbnail 
Thumbnail type  JPG

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FGDC Metadata (read-only) ▼►

Entities and Attributes  ▼►

Detailed Description
Entity Type
Entity Type Label blue_hh_shd.vat
Entity Type Definition
raster data set
Entity Type Definition Source source

Attribute
Attribute Label Rowid
Attribute Definition
Internal feature number.
Attribute Definition Source Esri
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

Attribute
Attribute Label value
Attribute Definition
value for shading based on solar azimuth and angle. The value represents illumination, where 0 = shadow, and 255 = full sunlight.
Attribute Definition Source source
Attribute Domain Values
Range Domain
Range Domain Minimum 0
Range Domain Maximum 255
Attribute Units of Measure illumination

Attribute
Attribute Label COUNT
Attribute Definition
number of times a value code occures in the grid
Attribute Definition Source esri
Attribute Domain Values
Unrepresentable Domain
sum of cells for particular values
Attribute Value Accuracy Information
Attribute Value Accuracy sum of cells for particular values

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